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Applying Insulation In Walls of Existing House

Applying insulation in existing walls

Cold walls, high energy bills, and draughts inside your home are some of the signals you need to install better quality insulation.

Among homeowners. insulation in the walls of an existing house is becoming more and more popular. With people living in older houses acknowledging the fact that insulation is key to ensuring internal comfort’s maintained, we see more and more renovations projects requiring a revamp.

Whether your house is as old as the hills, or has just recently been constructed, here’s how you can add insulation to the walls of an existing house the easy way…

Upgrading Existing Insulation: Why Do It?

Higher energy bills are the main reason why homeowners are becoming more aware of the need for proper insulation in their home.

Depending on the material you choose, you can save anywhere between 10 and 50 percent of your energy bill. Insulation starts with sealing air leaks, and then adding insulation.

Depending on the age of your home, as well as the location, the R-value of your home will vary. For example, houses built before World War II are nowhere near as sufficiently insulated as the properties that are constructed today.

The best part about wall insulation is that you can add insulation in walls of existing house without removing drywall. You do not even need to cut holes in the exterior siding. Some homes nowadays are specifically designed to be as energy efficient as possible.

Unfortunately, some modern homes still leave a lot to be desired, and they definitely need insulation to offset the high energy bills that ensue.

What Are The Costs?

There are many variables that determine the cost of insulating an existing house. For starters, the size of the surface area is the predominant, determining factor.

However, there are also many other factors at play. For example, if a home is more than one storey high, there will be additional costs because of the difficulty of the job.

The type of siding on the house is also a factor. Bear in mind that contractors work from outside of the house when insulating the exterior walls. The material of your home also plays its part.

Insulation Inspection: All You Need to Know

To attain a better understanding of your home’s insulation requirements, perform a simple test. You can easily check and evaluate the insulation in your home.

You can check the attic, floors, and walls in an unheated place. And you will see the type of insulation that’s currently there, and then measure the depth.

As for checking insulation, and inspecting the exterior walls, do the following. Start by turning off the power to the outlet. Now, remove the outlet cover, and then shine a flashlight into the crack around the outlet box.

You will be able to see if there is any insulation, and check its thickness.

Internal and External Insulation: What’s the Difference?

We mentioned previously that exterior insulation is usually the first choice. But let’s first determine the difference between internal and external insulation before we make any immediate assumptions. Like most things in life, each comes with its own set of advantages and drawbacks.

Internal wall insulation is cheaper to install, and you can do it room by room. However, you will slightly reduce the floor area of the room that you apply it to. The downside of internal wall insulation is that if installed by an unlicensed contractor, can leave you with decidedly dodgy repercussions.

External wall insulation, on the other hand, does not reduce the floor area of your home, and can be applied without disruption to the household. When applied, wall insulation renews the appearance of your outer walls.

By protecting the brickwork, external walls insulation increases the life of your walls, and improves the weatherproofing and sound resistance of your household. The downside is external wall insulation might require planning permissions, and you should check this with the local council.

applying insulation in existing walls

Why Solid Wall Insulation?

For homes built before 1930, external wall insulation is the only option. They do not have cavities that can be injected with insulation. Homes built before 1930 have solid walls benefit by slowing the movement of heat out through the walls.

One thing to note: installing solid wall insulation is not normally considered a D.I.Y project. Therefore, it is best to hire a professional contractor.

Why install solid wall insulation? Well, for starters, you can save up to £600+ on your yearly fuel bill, with the energy reduction between 10 and 50 percent.

The home is also now a breathable household, and insulation eliminates penetrating damp. In addition to the practical benefits, insulation in the walls of an existing house also significantly improves the exterior décor.

Insulation You Can Count On

All this talk about wall insulation, we are finally at the point where we can present a product we firmly believe is the best. The Home Logic wall insulation can insulate bricks, and every other porous building material.

The product works by chemically bonding to the surface, and then penetrating up to 17mm. This creates an invisible insulation barrier that will protect your home against rain, dirt, pollution, oil, algae, and other problems.

Do not worry about the building material and surface of your home. Wall insulation can bond with concrete, bricks, and every other material.

The wall insulation system will reduce water absorption by more than 95%, resulting in much better thermal efficiency of your home. In essence, this reduces the energy bills of your home.

An underrated aspect of the wall insulation is that your masonry will now be able to breathe, and be permeable to water vapour. At the same time, the masonry will allow air and moisture to pass through from one side to another.

In terms of maintenance, the wall insulation makes your exterior walls self-cleanable. Dirt particles are not able to hold on the brickwork. They will simply flow off with rainfall.

If you are still thinking about whether to install insulation in the walls of an existing house, think about this for a moment. According to tests, just 5% damp content will reduce the insulation performance of your home by 50%. Think of how much lost energy that is; why take the risk?

External Wall Insulation: How Is It Installed?

To help you understand that you won’t need remove drywall or do any special renovations, let’s explain the process of installing external wall insulation.

Everything starts with inspection. A team of professional contractors will inspect the outside walls of your property. Their goal is to identify problems that might occur during the installation process.

They will also perform a power wash, which is a way to remove years of accumulated dirt, mould, stains, and loosely adhered paint.

Once the foreign substrates are removed, the contractors will be able to highlight any areas that need repair. Just after the power washing process, the team will check for moss and/or algae, and treat the areas with fungicidal agents.

applying insulation in walls of existing house

It is now time to repair the walls. The team will repair all the cracks on the walls of your home, and remove loose debris. They will also use high-quality filler to repair damage and get a uniform surface. The render is due for repairing as well. Any areas with damaged render are removed and then re-rendered to match the existing surface.

After the repair process is finished, the team might perform bagging. This is a process in which surfaces of poor quality and unpainted surfaces get additional stabilization thanks to a SBR/Unibond Bag Coat. The team will also have to perform masking.

This will cover the areas that are not subject to spraying with heavy-duty paper and masking tape. The areas include: doors, drainpipes, gutters, windows, and similar objects.

Next up, it’s time for applying the insulation itself!  The primer coat is a specialist primer applied to the wall surface. The primer coat makes sure that there will be an excellent bond between the surface and the substrate.

It will also ensure you are left with a long lasting finish. For the coating application, the team uses industrial machinery for a fast application. The long life protective wall coating comes in different colours and textures. You can choose the one that suits your style the most.

In the end, the team of contractors will also clean the site, and remove all masking. You will be called to perform one final inspection after the work is done. If you have any complaints, the team will make sure they address them immediately.

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