How to Choose the Right Wall Insulation and Home

Insulation was essential in making our space possible. It was so cold that our paint would freeze in winter and so hot in summer that you couldn't stay there for long. Today's post will be very practical and covers how to choose the right home insulation.

Let's start with the basics when it comes to insulation.

Different Types of Insulation

If you are a homeowner, you will have to choose between fiberglass insulation (which you ended up with) or spray foam insulation (which you seriously considered).

What are the main differences? Spray foam insulation is best installed by professionals. It also has a higher R-value. It seals tightly between the exterior wall and the studs.

The spray is applied to the wall cavity one at a time, layering it. It then hardens. Spray foam will be required for an exterior wall to attain a good R-value.

Fiberglass insulation is easier to install than traditional insulation. It could be installed in under an hour. However, you will still need to use a mask and ensure that the studs are as close as possible. Spray foam tends to cost a bit more than this.

What should be the R-value for exterior walls?

R-value is a measure of how well an area is insulated against heat loss and transfer. We once had an old exterior garden room that had insulation, but it was only R11, which is the minimum available. It wasn't properly installed (large gaps and insulation that wasn't thick enough).

In effect, this meant that we didn't get the minimum amount of insulation in this area. Do we recommend R11 insulation on exterior walls? If it is a shed, yes. If you intend to use the space for a prolonged period of time, it is not recommended.

Current codes require residential homes to have R18 insulation and, ideally, R24. This was possible with fiberglass insulation between the walls. When installing insulation, it is important to consider the ceiling space and the floor.

Considerations when insulating exterior walls

R11 insulation should not ever be used on exterior walls near windows. R11 insulation is almost ineffective in small areas. If you use it, increase its thickness or choose a product with a higher R-value.

Sealing cracks around exterior wall outlets is also important, as heat and air transfer can occur here.