Everything You Need to Know About Insulating Your Garage Conversion

A garage conversion is a fantastic way to make more room in your home. It’s a great alternative to spending time and money on building an extension. However, one thing that garages don’t normally have is sufficient insulation. So you’re going to have to think about insulating your garage.

Whether you are converting your garage into an office, bedroom or dining space, you need to keep the people in it warm. So take these actions to insulate your garage effectively.

Consult building regulations and u-values

Building regulations say that your garage conversion should meet certain thermal standards. The walls, floor and roof will require insulating so its u-value meets or is below the required value. The u-value represents the rate of heat loss through the product. The lower it is, the more heat the building retains.

Wall insulation

There are two different wall insulation types to consider:

External wall insulation: This kind of insulation is best for detached garages. This is because the insulation and render go on the outside of the garage. A benefit to this is that it gives you the most amount of space in your garage as possible.

Internal wall insulation: You can use insulated plasterboard with drywall screws over a damp proof course to insulate your garage. This technique is more popular and often simpler but will reduce the amount of inside space you have.

The roof

The majority of garages have flat roofs that can be insulated on the inside or outside. Warm roofs are insulated above and between the roofing joists. If your garage already has this then you don’t need to do anymore. However, for cold roofs, where insulation is just between the roof joists, you need to create adequate ventilation. This will help to prevent condensation. You might have to add more insulation to ensure your garage roof meets the required u-value.

The floor

Believe it or not, you also need to insulate your garage floor. You need to work out the Perimeter/Area (P/A) Ratio, which is the perimeter of the exposed walls divided by the floor area. You can use this to work out the insulation thickness you need to get the right u-value. You need to think about the floor level in your garage compared to the rest of your home. If the floor is lower than the rest of your property, you can add insulation and build up the flooring to the same height as the rest of your home. But if your current flooring is already level, you may need to dig up the floor to add damp proof course and insulation.

Your insulation professional and builder should be able to give you advice on the best way to insulate your garage conversion. Simply complete our online form to get quotes from up to 4 professionals in your local area.

Evy Coe

Evy works for Quotatis as a Content Marketing Executive. She loves to write about interior design and help homeowners with their DIY projects.