What insulation should be used for wood-frame walls?

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A building’s energy efficiency is a feature that construction contractors are increasingly paying attention to. Proper insulation is one of the best ways to help generate energy savings.

Wood-frame walls used in many projects have a hollow space that can be insulated with different materials. But what is the best insulation for this type of wall?

Insulating wool for wood-frame walls

Generally sold as preformed mattresses that are easy to insert between the studs of wood-frame walls, insulating wool slows the spread of heat, cold and noise in structures. It achieves this by trapping air pockets.

Fiberglass insulating wool

Composed of extremely fine glass fibres, it is marketed in different densities. It is commonly used for the insulation of exterior walls because of its R-value, which can range from low to very high.

Mineral wool

Mineral wool is formed by spinning or drawing molten mineral or rock materials such as slag and ceramics. Its fibres are positioned in any way relative to each other. Its R-value is also variable.

Cellulose: an eco-friendly alternative for wall insulation

Cellulose insulation is an ecological, effective and non-toxic thermal solution that is worth considering. Most often, it is sprayed inside the walls by professionals and reaches a density that oscillates around 3.5 pounds per cubic foot.

Cellulose is “green”. It includes post-consumer recycled newsprint. The fibre is chemically treated with non-toxic borate compounds to resist fire, insects and mould.

Rigid insulation panels for insulating prefabricated walls

Rigid insulation panels can be used to insulate almost any part of your home, from the roof to the foundation. However, they are particularly effective for insulating walls made of prefabricated panels. They offer a thermal resistance up to 2 times higher than most other insulating materials of the same thickness. In addition, they reduce heat conduction by structural elements, such as wood. The most common types of materials used in the production of foam panels include polystyrene and polyurethane.

Polyurethane foam sprayed into the walls

In addition to being a very high R-value thermal insulator, spray polyurethane foam also acts as an air and vapour barrier when applied inside a wood-frame wall. It fits perfectly into the shape of the walls and is also moisture resistant.

However, this insulation technique is more expensive than insulating wools and bulk cellulose. In addition, it is recommended that polyurethane foam be applied by qualified technicians for the best results.

Insulation is included when you choose UsiHome wood-frame walls

In conclusion, choosing insulation to maximize the energy efficiency of wood-frame walls is no easy task, with all options having their advantages and disadvantages.

At UsiHome, we always include the insulation of our wood-frame walls to make your life easier. Don’t hesitate to contact one of our representatives to find out how our machined wood structures can contribute to the success of your construction project.

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