Your Ultimate Guide to Internal Wall Insulation UK ()

• Internal wall insulation is cost-effective and can be up to 50% cheaper than external wall insulation.
• The typical cost of internal insulation ranges from £40 to £50 per square metre.
• Properly installed internal wall insulation can last up to 25 years, providing long-term energy savings and increasing the value of your home by up to 14%.
• Internal wall insulation is an effective way for homes located in protected or conservation sites to improve energy efficiency without altering the house's external appearance.

Poorly insulated walls are a significant source of heat loss, with up to 35% of your home’s warmth escaping through uninsulated surfaces. In the UK, where more than 21 million homes suffer from inadequate or non-existent insulation, this issue not only drives energy bills to all-time highs but also plays a major role in the country's carbon emissions—domestic energy use alone accounts for a staggering 27% of the UK’s total carbon footprint.

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For homeowners with solid walls or those living in properties where altering the exterior is not an option, such as historic homes, internal wall insulation presents a highly effective and practical solution. This approach is not only one of the most efficient ways to retain heat but also one of the most cost-effective. By choosing internal wall insulation, you could save between £140 and £700 annually on your energy bills while reducing your carbon emissions by 410 to 2,100 kg of CO2 each year.

In this ultimate guide, we will explore everything you need to know about internal wall insulation—from the different types available and methods of installation to costs involved—so you can make an informed decision about whether this is the best choice for your home. 

If you're ready to boost your home's energy efficiency and save on energy bills, let GreenMatch connect you with top-rated internal insulation specialists. Simply fill out our quick form to receive up to four free quotes from expert installers, ensuring you get the best advice and deals with no hidden costs. Click below to get started!

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What is internal wall insulation?

Insulating your internal walls involves adding a layer of insulation material to the inside of your home's existing walls. Attach rigid insulation boards directly to the wall or build a stud wall filled with insulation for effectiveness. Once insulated, apply smooth plasterboard for a finished surface, ready for painting or wallpapering.

The method includes several vital layers:

• Existing wall surface: The original interior wall is made of brick, stone, or other materials.
• Vapour control layer: A layer that prevents moisture build-up, reducing the risk of condensation and dampness. 
• Insulation layer: The main insulating material that acts as a thermal barrier, reducing heat loss.
• Plasterboard or internal finish: The final layer, typically plasterboard, provides a smooth, decorative surface.

Insulation for walls is especially effective for homes with solid walls that do not have cavities for insulation or in cases where cavity wall insulation is not possible. It is a cost-effective solution, often more affordable than external wall insulation, which can be up to 50% more expensive. Additionally, internal insulation is ideal for homes where the exterior cannot be altered, such as historic or protected buildings.

Only external walls separating your living space from the outside typically need internal insulation, not all walls. Internal walls usually don’t require insulation unless soundproofing or temperature control between rooms is necessary.

How do you know if your home has solid walls?

Determining whether your home has solid walls is important when considering internal wall insulation options. Here are a few ways to identify if your home has solid walls:

Age of your property: Homes constructed before the s in the UK likely have solid walls, as cavity wall construction was uncommon.

Brick pattern: Check your exterior brick pattern to identify solid walls. Solid walls show alternating long sides (stretchers) and short ends (headers) of bricks in sequence.

Wall thickness: Solid walls tend to be thinner than cavity walls. You can measure the thickness by checking at a window or door. Solid walls are typically around 260mm or less.

Drilling: Insulation specialists might use a small drill to inspect the wall's construction. This method is more invasive but can confirm whether the wall is solid or has a cavity.

Knowing if your home has solid walls is important because it affects the insulation options available. Cavity walls are designed for insulation within the cavity, adding internal insulation may not improve efficiency and could be costly. It can also lead to moisture problems and structural issues. Identifying your wall type will help you choose the best insulation solution for improving your home's energy efficiency.

Best insulation for interior walls

When insulating interior walls, choosing the best wall insulation is crucial. When choosing insulation, consider factors such as wall type, budget, and specific requirements. Prioritise materials with a high R-value that are also moisture-resistant and fire-resistant. A variety of materials are available for internal wall insulation, including:

• Rigid foam boards
• Fibreglass
• Cellulose
• Mineral wool 
• Cork boards
• Sheep wool

You can choose your material based on personal preference, but we’ve highlighted some of the best and most popular internal insulation materials in the UK.

Rigid foam boards

Rigid foam boards, such as polyisocyanurate (PIR), extruded polystyrene (XPS), and expanded polystyrene (EPS) boards. They are highly effective insulation options due to their high thermal resistance (R-value) and ease of installation. These boards are particularly effective at reducing heat loss, making them ideal for homes with solid walls. 

Additionally, they offer good moisture resistance, making them suitable for areas prone to dampness. These boards can be applied directly to your internal walls, providing excellent insulation with minimal thickness. They are an ideal solution for those looking to maximise interior space while enhancing energy efficiency.

Fibreglass

People commonly use this material for internal wall insulation because it effectively traps heat and is affordable. Manufacturers treat it with a fire-retardant substance, enabling it to withstand temperatures up to 540 degrees Celsius, ensuring safety in case of fire or high heat.

However, it does not provide an airtight seal, which can lead to moisture issues. The material can absorb water, reducing its ability to block heat transfer and lowering its R-value. This can create conditions conducive to mould and mildew growth.

Despite these drawbacks, this insulation is an excellent choice for budget-conscious projects or where ease of installation is a priority. It is particularly well-suited for insulating stud walls.

Cellulose

Cellulose insulation is an eco-friendly, effective option for internal walls, made from recycled paper treated with fire-retardant chemicals.

Though moisture-resistant, cellulose can sag in damp conditions, so proper ventilation is crucial to prevent long-term issues. We do not recommend cellulose for homes with stone walls, as moisture management poses a significant concern in those cases.

Despite these drawbacks, cellulose remains an excellent choice for those seeking a sustainable insulation material with a good R-value. It provides an effective airtight seal when properly installed and is one of the most cost-effective sustainable insulation options available.

Spray foam

This type of internal wall insulation comes in two forms: open-cell and closed-cell spray foam. When applied, spray foam expands to fill gaps and cracks, creating a highly effective thermal barrier. Closed-cell foam provides excellent insulation and moisture resistance, while open-cell foam excels at soundproofing.

However, spray foam insulation is among the more expensive insulation options. It requires careful handling, as the chemicals can harm the skin and respiratory system. This necessitates protective gear during installation. Despite these drawbacks, spray foam is an excellent choice for insulating areas with complex shapes or hard-to-reach spaces where traditional insulation may fall short. It is also ideal for adding structural strength to walls.

How to insulate internal walls

You can install internal wall insulation using various methods, depending on the insulation material, your home's specific needs, and your budget. Before selecting the most suitable method for your home, it is essential to follow these preparatory steps:

1. Assess the condition of your walls: Inspect your walls for any signs of dampness or damage. It's crucial to repair any issues before installing insulation to ensure its effectiveness and prevent future problems.
2. Understand the dew point: The dew point is the temperature at which air becomes saturated with moisture, leading to condensation. If the temperature of your internal walls drops to or below the dew point, moisture can condense on the surface. Properly managing the dew point within the wall structure is essential. This may involve adding a vapour barrier to prevent condensation in areas that could cause long-term damage.
3. Remove fixtures: Remove fixtures like electrical outlets, radiators, skirting boards, curtain rails, and shelves. Turn off power and drain radiators, and carefully unscrew or pry off items. Label and store all hardware for easy reinstallation after insulation. Repair any wall damage before proceeding with insulation and plasterboard.
4. Address potential thermal bridges: Identify areas prone to thermal bridging, such as window and door reveals, floor voids, beams, joists, and pipes. These areas can easily allow heat to escape. Properly insulate them to maintain the continuity of the thermal envelope before starting the main insulation installation.
5. Prepare the wall surface: Remove any old plaster, wallpaper, or paint to create a smooth, clean surface to ensure proper insulation adhesion and effective performance.

Once you're familiar with the necessary steps to prepare for internal insulation, you can select your preferred installation method. Here's how to insulate internal walls:

Stud wall insulation

Stud wall insulation involves building a 100 mm thick secondary wall, with a 40 mm cavity between it and the existing wall. Though reducing floor space, it supports thicker insulation, offering excellent thermal performance and space for wiring or plumbing.

After constructing the stud wall, insulation is installed between the studs. The insulation must fit snugly, as gaps cause thermal bridging and reduce overall effectiveness. After installation, a vapour barrier prevents condensation and moisture issues within the wall. The final step involves fixing plasterboard panels over the stud wall framework to create a smooth, finished surface.

Constructing a stud wall requires more labour and materials, making it pricier but ideal for older or damp-prone walls. While not always more efficient, it accommodates thicker insulation and addresses problematic walls, making it valuable in certain situations.

Direct wall insulation

Direct wall insulation simplifies internal insulation by applying materials directly to the interior surface of existing walls. This method commonly uses rigid foam boards, which are typically glued to the wall's surface.

After installing the insulation, carefully seal the joints between the boards to prevent air leakage. Next, cover the insulation with a vapour barrier and finish with plasterboard, creating a smooth, durable surface.

This method is ideal for homes with flat walls and few to no damp issues. It is cost-effective, less invasive, and relatively easy to install. Direct wall insulation is a space-efficient solution that can significantly improve a home's energy efficiency, making it warmer and more comfortable while reducing heating costs. 

Proper wall preparation and moisture management are crucial for long-term insulation performance and preventing issues like condensation. Specialised fixings are required to reattach items like cabinets and mirrors, potentially increasing costs compared to traditional fixings.

Batten wall insulation

Batten wall insulation is a method of internal wall insulation where wooden or metal battens are attached to the interior surface of the existing wall, forming a grid or framework. Insulation material is placed between these battens, followed by plasterboard or another finishing material.

There are two main types of batten wall insulation: cold batten insulation and warm batten insulation

• Cold batten insulation: The battens are fixed directly to the wall in this more common method. It’s beneficial for uneven walls but has the downside of potentially causing thermal bridging, as the battens are in direct contact with both the cold external wall and the warm internal surface. Additionally, the screws that secure the battens can pierce the vapour barrier, reducing its effectiveness in resisting moisture.
• Warm batten Insulation: This method involves placing the insulation directly onto the wall, with the battens positioned on top and secured through the insulation into the internal wall. Keeping the battens insulated from the wall reduces the likelihood of thermal bridging and battens rotting. Since the insulation is applied directly to the wall, this method offers better moisture resistance and thermal performance.

Insulating plaster application

Insulating plaster for internal wall insulation utilises a specialised plaster containing insulating materials. This plaster is applied directly to the interior walls of a building. This method seamlessly combines plastering with the benefits of insulation, providing a streamlined approach to enhancing a home's thermal efficiency without additional layers or bulky insulation boards.

Insulating plasters are designed to be breathable, allowing moisture to pass through the walls. This feature helps prevent condensation and damp issues, making it suitable for older buildings or homes with solid walls.

Insulating plaster adds minimal thickness, preserving more floor space compared to methods requiring thick boards or stud walls. While insulating plaster improves thermal efficiency, it provides less insulation than rigid foam boards or batten wall insulation.

Internal wall insulation cost

The cost of internal wall insulation for a typical semi-detached three-bedroom house is approximately £7,500. However, this can vary depending on factors such as the type of insulation material, wall condition, installation method, room size, and labour costs. Typically, internal wall insulation costs between £40 to £50 per square metre, including materials and labour. For more complex methods like stud wall insulation, costs can rise to about £100 per square metre.

It's crucial to repair any wall damage, such as holes or cracks, before insulation, typically costing around £120. Addressing these issues is essential to prevent dampness, structural damage, and thermal bridging, which could compromise the insulation's effectiveness. 

Labour costs can account for up to 60% of the total expense, with insulation installers generally charging around £250 per person per day. The project's complexity can extend the installation time, leading to higher costs.

To help offset these costs, several grants for internal wall insulation are available:

• Great British Insulation Scheme: Available in England, Wales, and Scotland, this grant offers free or low-cost insulation to homeowners, landlords, and tenants. Eligibility is based on factors like EPC ratings or specific Council Tax bands.
• Energy Obligation Grant (ECO): This scheme requires energy suppliers to assist low-income, fuel-poor, and vulnerable households by installing insulation to reduce energy bills.
• Warmer Homes Scotland Scheme: Covers costs for energy improvements for eligible households in Scotland, targeting specific criteria like age, income, and benefits.
• Affordable Warmth Scheme (Northern Ireland): Assists low-income individuals with energy efficiency improvements in private accommodations.

To explore these grants and determine eligibility, contact your local authority or visit your government's website for more details.

What is the cheapest way to insulate internal walls?

Insulating internal walls affordably depends on wall condition, DIY skills, and insulation needs. Here are some cost-effective methods:

1. Thermal lining paper: This thick, insulating wallpaper can be applied directly to internal walls. It typically costs around £10 per m2, but the price depends on the brand. It's easy to install and makes for a good DIY project. All you need is the lining paper, adhesive, and basic tools.
2. Insulated plasterboard: You can install this plasterboard, which comes with attached insulation, directly onto internal walls, combining insulation and finishing in one step. Simply glue or screw the boards to the wall, then seal the joints before finishing, making it ideal for a DIY project.
3. Loose-fill insulation for stud wall: If you have stud walls in your home, you can insulate it with material such as fibreglass or cellulose with both materials costing on average £10 per m2. While it's possible to use a professional installer ensures even coverage and better results. This method is particularly effective if you already have stud walls in place.

Grants in the UK are only available for insulation work carried out by certified installers. While DIY can save on labour costs, you will not be able to apply for grants.

Another effective way to reduce costs is by comparing multiple quotes for materials and insulation specialists. Finding the right insulation specialists can be time-consuming and complex. GreenMatch simplifies this by offering up to four quotes from top specialists in your area. Fill out our quick 30-second form to receive the quotes for free, with no obligation.

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Internal wall insulation regulations in the UK

When installing internal wall insulation in the UK, understanding the relevant regulations is crucial to ensure that the work improves energy efficiency without compromising the building’s integrity or causing issues like dampness or poor ventilation.

• Thermal performance: UK regulations require insulation added to existing walls to meet specified thermal performance standards. Typically, internal wall insulation should achieve a U-value of 0.3 W/m2K or lower to comply with these standards.
• Insulation thickness: While there are no strict requirements for insulation thickness, it’s generally recommended to use around 100mm of insulation to achieve the required U-value.
• Ventilation: Proper ventilation is essential when installing insulation. The Building Regulations mandate that insulation work not compromise the building’s ventilation. This may require adding ventilation features like air bricks or mechanical systems to prevent moisture buildup.
• Moisture control: Ensuring that walls are free from damp before installing insulation is critical. Any damp issues must be resolved beforehand, and the insulation process should include vapour barriers to prevent condensation within the wall structure.
• Breathability: For older buildings, particularly those with solid walls, breathable insulation materials may be necessary to allow moisture to escape, reducing the risk of damp-related problems.
• Fire safety: Insulation materials must comply with fire resistance standards. Internal wall insulation typically involves using fire-retardant-treated materials and ensuring proper installation to minimise fire hazards.
• Listed buildings: If your property is a listed building or located in a conservation area, planning permission is often required before installing internal wall insulation. It’s essential to contact your local authority before starting any work that could affect the appearance of these types of homes.

While understanding these regulations is important, the most crucial step is to contact your local authority. They will review your plans and ensure that all work meets the necessary regulations.

Pros and cons of internal insulation

Internal wall insulation is a highly effective way to improve a home's energy efficiency, especially in properties with solid walls that cannot accommodate cavity wall insulation. However, it's essential to be aware of the potential drawbacks of this method before making a final decision.

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Pros

• Cost-effective: Internal vs external wall insulation is more affordable for solid walls and often can be almost 50% cheaper. 
• Long-lasting: When properly installed and maintained, internal wall insulation can last for decades, often up to 25 years, providing long-term energy savings. 
• No external changes: Since the insulation is installed indoors, it does not change the exterior appearance of the building. This is especially beneficial for listed buildings or homes in conservation areas where external modifications may not be allowed.
• Improved energy efficiency: Internal wall insulation significantly reduces heat loss, leading to lower energy bills and a warmer home.
• Increased property value: Adding insulation to increase your EPC rating can boost your home's value by up to 14%.
• Breathable options: For older homes with solid walls, breathable insulation materials can allow moisture to escape, reducing the risk of damp issues.

Cons

• Disruption to rooms: The installation process may cause disruption, as it may require moving furniture and render rooms unusable while work is ongoing.
• Reduction in room space: When installing internal insulation, you can expect to lose an average of around 100 mm of floor space per wall.
• Damp issues: Improper installation of internal wall insulation can trap moisture within the walls, which may result in condensation and damp problems. This is especially concerning if the installation does not include vapour barriers or proper ventilation.
• Impact on fixtures and features: Existing fixtures such as electrical outlets, radiators, and skirting boards need to be removed and reinstalled during the installation process, thus increasing the time and cost of the project.
• Thermal efficiency: While internal wall insulation provides adequate thermal efficiency, it is less effective than external insulation.

Is interior wall insulation worth it?

Internal wall insulation is a beneficial investment for homeowners seeking to improve energy efficiency, lower heating costs, and enhance living space comfort. Not only does internal wall insulation significantly reduce heat loss, leading to lower energy bills, but it also contributes to reducing your carbon footprint and helps you to lead a more sustainable lifestyle. Additionally, it can increase the value of your home while eliminating cold spots and drafts, thus enhancing overall comfort.

It's essential to weigh the benefits and drawbacks of internal wall insulation. The installation process can be disruptive, making rooms temporarily unusable. However, despite these short-term inconveniences, the long-term benefits, such as increased energy savings and improved home comfort, often outweigh the initial disruptions.

Ultimately, investing in internal wall insulation depends on your specific circumstances. If you have a home with solid walls, face high energy bills, or want to reduce your environmental impact, consider adding internal wall insulation to your property.

To make an informed decision, it's crucial to gather quotes from multiple certified insulation specialists. They have the expertise to assess your home's unique needs, provide detailed cost estimates, and help you estimate potential energy savings. By comparing quotes, you can pinpoint the ideal solution for your budget and objectives, ensuring that your insulation investment is strategic and impactful.

At GreenMatch, we streamline the process by offering up to four complimentary quotes from top internal wall insulation specialists. Say goodbye to wasting time and money—complete our quick form to receive these quotes with no hidden fees or obligations. Click below to learn more and take the first step towards a more energy-efficient home!

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FAQ

Interior wall insulation is a valuable investment for homeowners aiming to improve energy efficiency, reduce heating costs, and enhance comfort, particularly in properties with solid walls. It is also the most cost-effective wall insulation option, making it ideal for those who are budget-conscious.

In the UK, internal wall insulation typically needs to be around 100 mm thick, depending on the insulation material and the desired thermal performance. Thicker insulation, around 100mm, can achieve the required U-value of 0.3w/m2k.

Yes, internal wall insulation can cause damp if not properly installed, as it can trap moisture within the walls. To prevent this, it’s important to include a vapour barrier and ensure adequate ventilation to manage moisture effectively.

The best insulation for internal walls depends on your specific needs, but rigid foam boards are a top choice for their superior thermal efficiency, moisture, and fire resistance. For an eco-friendly option, cellulose is an excellent choice as it is both cost-effective and sustainable.

Did you know? Around 35%to 40% of heat loss in a house occurs through windows, walls, and doors in the winter. That mainly happens in older houses, which have solid brick walls, where the result is the climate effect and more spending on electricity to keep the room temperature stable during the summer and winter.

However, there’s a growing concern of climate change and rising energy bills. House owners are looking for an alternative way to make their homes energy efficient. This is where the Internal Wall Insulation comes as a great solution.

It’s an additional layer of wall that is installed on the interior of the outside wall to prevent heat loss during winter and cool air during summer, reduce noise, save money on energy bills and be environmentally friendly.

These days internal wall insulation is getting popular because of its numerous advantages. But, there are so many homeowners who are unfamiliar with internal wall thermal insulation. Don’t worry!

So, if you’re planning for internal wall insulation in your home as a cost effective and energy efficient solution, then keep reading.

In this guide, we will deep dive into detail, its types, how it works, benefits, and how to install in your home. Let’s find out!

What is Internal Wall Insulation?

Internal wall insulation is a process of adding insulation materials to the inner side of a building’s external walls. These insulation materials act as a thermal barrier on the inner walls which keep the warmth within the building during winter and cool air during the summer.

This helps to keep the building’s inside temperature appropriate and control the temperature flow. It overall leads to reducing energy bills and is environmentally friendly.

In some cases, it is also called Drilling, which is bonded or screwed to the walls. Internal wall thermal insulation is a cost effective option for homeowners who have solid brick walls, have high energy consumption, or are planning for renovation.

Benefits of Internal Wall Insulation

Here are some key benefits of internal wall insulation:

1. Improved Energy Efficiency

One of the biggest reasons why every homeowner is planning to install internal wall insulation is energy efficiency. If your home is not insulated or has solid brick walls, then the heat or cool air does not stay in your home and transfers through the windows, walls, and doors. And it increases the spend on electricity. However, internal wall insulation keeps the heat during the winter and cooled air during the summer, which leads to energy efficiency and reduces energy consumption.

2. Moisture Control

If your home has moisture infiltration, then it can damage your property, cause poor indoor air quality, and various health risks. That’s why having insulation in the interior walls is a better option. Insulating interior walls have moisture resistant material that acts as a protective layer. It keeps the temperature balanced in summer as well as winter, improves air quality, and prevents mold growth.

3. Cost Savings

After internal wall insulation, it lowers the energy bills by maintaining the thermal temperature and reduces the damage on property. As a result, it saves cost on energy and property maintenance.

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4. Comfortable Living

Another amazing benefit of internal wall insulation is reduced noise from outside. It overall leads to a comfortable and peaceful living without any outer disturbance and pure air quality.

5. Enhanced structural durability

By installing internal wall insulation, your home is not only soundproof and maintains thermal temperature. But it also helps to enhance the structural integrity and durability of your home. When there’s a proper temperature flow, pure air quality, and noise reduction, then it minimizes the risk of cracks, warping, and other damages and ensures durability for a long time.

Internal Wall Insulation Types

Here are four main types of internal wall insulation that you should know:

1. Rigid Insulation Boards

One common type of wall insulation is rigid insulation. It is made up of dense sheets of foam material such as polyiso, polystyrene, or polyurethane. It is directly placed on internal or external walls and acts as a barrier against heat transmission. However, it’s quite an expensive type of insulation as compared to other types of insulation and requires careful installation.

2. Insulated Plasterboards

It’s a combination between a layer of insulation and a layer of plasterboard which is used. It is also known as foam backed plasterboard or thermal plasterboard. It is an energy efficient insulation type which can reduce energy cost and improve wall’s durability. It’s available in different thickness and sizes with easy installation.

3. Blown-in Insulation

Blown-in insulation is also known as loose fill insulation. It’s a process that blows loose material into cavities with a special machine and hose. There are different types of material used for blown-in insulation such as cellulose, fiberglass, mineral wool, rock wool, natural wool and styrofoam pellets. This insulation has a high R value and tight air seal. However, this insulation might settle with time.

4. Foam Insulation

It is a low density polymer that provides thermal insulation. It’s lighter, has better insulation, and is of high quality. It comes in various forms, such as Spray on foams, rigid form panels, custom pre molded shapes, cellular foams, flexible foams, and more. It’s used in homes, commercial buildings, and other spaces. It’s a better insulation but has a high upfront cost and installation complexity. Also, foam insulation contains some chemicals like isocyanates, which can affect skin and lung sensitization.

Materials Used for Internal Wall Insulation

Here are some key materials used for internal wall insulation:

1. Mineral Wool

Mineral wool is a type of fibrous material which is made from minerals like stone or silica. Two common examples of mineral wool are rock wool and slag wool. They have thermo acoustic properties, fire resistant insulation and are durable. It can not be burned and has low water absorption. It is mainly used because of fire resistant and sound absorbing properties.

2. Polystyrene

Another common material required for wall insulation i.e, Polystyrene. It is mostly used in buildings for heat prevention and available in different formats such as foam, boards and sheets that are placed inside the walls to maintain the thermal temperature. It’s a colorless and transparent thermoplastic which is used to make foam board, beadboard and concrete block insulation. However, the thermal resistance or R value of Polystyrene foam board depends on its density.

3. Polyurethane Foam

Polyurethane is a popular choice for internal wall insulation. Most homeowners and builders use this wall insulation material because of its high R value per inch of thickness, which provides high energy efficiency. It is available in both closed cell and open cell formulas. Whereas closed cell foam has high density cells and is filled with gas to expand and fill the space around it. On the other hand, open cell foam has a lower R value and is filled with air to give a spongy texture. So, it can be used as a liquid spray or rigid foam board.

4. Natural Materials

Some natural internal wall insulation materials are also used such as hemp, wood fiber boards, cellulose, cork, cotton, sheep’s wool, straw or perhaps fluffy insulation batts with a timber framework. These natural insulation are becoming popular among homeowners who are looking for eco-friendly materials for inner insulation.

How to Install Internal Wall Insulation?

Here’s the step by step process of installing internal wall insulation:

1. Preparation

The very first step for internal wall insulation in your home is preparation. It’s very important to keep your things ready, such as choosing the right insulation material and setting up the installation areas, which include clearing furniture, protecting floors from dust, proper ventilation to avoid dust, and electricity outlets cut off for safety purposes.

2. Measuring and Cutting Insulation

Then you need to accurately focus on the measurements before insulation. You need to measure the height and width of each wall where you plan for insulation and calculate the total area. So based on these measurements, you can define the amount of insulation required and cut to fit each section precisely.

3. Fixing Insulation to Walls

Now, it’s time for the internal wall insulation. Here you need to choose which type of insulation you want to install, whether it’s plugs and screws based on a special adhesive, plasterboards, or blown in. However, each installation required professional help. So, you can consider hiring an internal wall insulation service provider for perfect insulation.

4. Adding a Vapour Barrier

After the installation, adding a Vapor barrier is essential to prevent moisture within the wall cavity. First select a vapor barrier then unroll it across the insulated wall and make sure proper overlap at edges and corners. Then cut and fit the barrier around doors, windows and electrical outlets and then use specialized tape to create a moisture proof barrier.

5. Finishing

Once the insulation and vapor barrier are properly done, then you can start focusing on finishing the inner insulated walls, such as installing plasterboard, drywall, or other cleaning materials to give a final look at your newly insulated walls.

Cost of Internal Wall Insulation

Internal wall insulation is a cost effective option compared to external wall insulation. The average cost for internal wall insulation comes on average between $0.50 to $1.25 per square foot. However, the estimated upfront cost of internal wall insulation depends on various factors.

Initial Costs

The cost of internal wall insulation depends on various factors:

• Type of Insulation:

There are different types of insulation available, from rigid boards to blown-in. You can choose any type of insulation based on your budget and preferences.

• Size of the Wall:

Another factor that affects the cost of insulation is size of the wall. If the size of the wall is large then it requires more insulation material and installation efforts that overall leads to more cost.

• Additional Materials:

If you plan for add ons such as fixing, adhesives, a vapor barrier, and finishing, then it can also affect the cost of insulation.

• Complexity of Installation
• Complexity of inner wall insulation installation can also impact the cost because of irregular shapes, many windows/doors, electrical wiring complex and that collectively increase the cost.
• Professional Installation Cost

Hiring a professional insulation service provider is essential because installation requires skills and hands on experience, and it’s better to let the professional do it. So that’s another cost of internal wall insulation.

These factors mainly impact the initial cost of internal wall insulation. It’s always preferred to get a quote from a professional internal wall insulation service provider for an accurate estimated cost.

Long-term Savings

While it seems like a high upfront cost for internal wall insulation, there are long term savings. After having successful internal wall insulation, it acts as a thermal barrier. Which will keep your home warm in winter and cool air in summer. It is overall leads to low energy consumption and long term savings.

Conclusion

Internal wall insulation for solid walls is becoming a popular option for homeowners. It enhances their energy efficiency, reduces electricity consumption, keeps the home noise free, provides comfort at home, and makes the property long term durable. However, there are many things to consider before installing the internal wall insulation. Such as the type of insulation, the material required, etc. We hope this guide helps you know everything about internal wall insulation, its types, materials, benefits, and how to install it. It is highly recommended that you consult with a professional before installing internal wall insulation to get the solution to your specific needs. Now, it is your turn to find the most reliable wall insulation service provider for your home and let the professionals do the things for you.

FAQs

1 How Long Does Internal Wall Insulation Last?

The average lifespan of internal wall insulation is around 25 years. However, it also depends on the type of material used for insulation. It is better to consult with a professional first to get the best suggestion as per the needs of your home.

2 Can Internal Wall Insulation Be Installed in Older Homes?

Old houses should prefer internal wall insulation because of their thick stone walls then inner insulation helps to maintain thermal temperature.

3 What Are the Maintenance Requirements for Internal Wall Insulation?

Internal wall insulation is highly durable and it remains in good condition for years. However, it’s preferred to inspect at least once a year. Sometimes problems occurred due to negligence such as condensate blockage, use ladders carefully, prevent leaks etc.