GARAGE ROOF INSULATION

Garage roof insulation is an airtight barrier that prevents cold air seeping through a roof, designed to regulate temperature and create a far more comfortable temperature throughout the building. It not only keeps the noise down but also slows down heat loss and protects the building from rapid changes in temperature. Garage roof insulation is referred to as DIY insulation as it is easy to fit. While you are insulating the ceiling of your garage, you might want to also consider insulating your garage door. You will also want to insulate its roof if you will be adding a heating or cooling system to the garage. The most popular garage roof insulation used in the UK is either 15mm Xtratherm PIR or 12mm Celotex.

CHEAPEST WAY TO INSULATE A GARAGE ROOF

The two cheapest most popular materials for garage insulation are Polystyrene and Fiberglass roll insulation. Fiberglass roll insulation is easily unrolled and installed on horizontal surfaces. On other hand, EPS polystyrene insulation can be glued or fit between the wall studs with the vapor barrier facing the inside of the garage. However, fiberglass roll insulation is the cheapest and easiest type to install costing a little as £2.96/m².
 

CORRUGATED GARAGE ROOF INSULATION

Corrugated metal roofing can provide relatively poor thermal insulation properties in comparison to many other material alternatives. For this reason it need to be well insulated to keep the building below at a comfortable and consistent temperature all year round. It can also absorb sounds and reduce noise transfer, creating a quieter, more relaxed environment in the building below. By adding installation to a corrugated roof structure you can add a significant amount of value to the building itself. The more energy efficient the building, the higher it will be rated in terms of value. When it comes to insulating a corrugated roof, you have 3 options to choose from: either PIR rigid insulation board, Fibreglass or Spray Foam. 
Spray foam comes in the form of a liquid foam which is carefully sprayed into the correct position through high-pressure spray equipment. As the foam reacts with the air, it expands, hardens and cures within just minutes, creating a durable thick and rigid foam layer. However rigid foam (PIR) insulation is a more popular choice for corrugated metal roofs as it is far denser and thicker. It provides excellent water resistance and with correct installation, could last for up to 80 years. On other hand fibreglass is a budget-friendly and versatile product that can be cut easily to accommodate the shape and size of your roof structure. Flexible batts are perfect for tricky corrugated profiles. Fibreglass also helps to minimise the level of noise that travels from the outside in, creating a more productive and comfortable environment.

GARAGE ROOF INSULATION PRICES

The amount of money you spend on garage roof insulation can vary greatly depending on the type, so it's important to know what you're getting before you buy. You would be shocked at the cost to insulate the garage roof depending on the materials that you select. It could cost you anywhere from £2.40 to £55.60/m2. As of 2022 the cheapest type of UK roof insulation would be fibreglass (glass wool) costing as little as £2.96/m². For sure, PIR insulation is also a cost-effective building material that will pay for itself over time. Average cost of insulating your garage may cost you as of 2022 accordingly:

1. Fibreglass insulation - £2.96/m²
2. Rock wool insulation - £10.51/m² 
3. PIR Rigid insulation - £18.78/m²
4. Phenolic insulation - £41.16/m²
5. Spray foam insulation - £39.50/m²

IS IT WORTH INSULATING A GARAGE ROOF?

By insulating the garage roof you lower energy bills. This is true if your garage is joined to your house by a wall. It feels a lot better to work in a garage that’s not freezing in the winter and roasting in the summer. If you operate tools and machinery inside your garage your insulation will act as somewhat of a sound barrier. Moreover, an insulated garage is less likely to cause your vehicle’s windows to frost over on those extra cold mornings. All of the benefits of insulating your garage only come when you insulate your garage the right way. If you are in the garage for 6 hours or more then insulation is worthwhile. If you only pop out for a 1 hour then it isn't worth it.

CAN I INSULATE MY GARAGE ROOF?

Sure, you can and it is very important to insulate the ceiling of your garage. This is particularly important for the warmer and cooler months. The insulation will keep the heat trapped in your home and allow you to save on your heating bill, during the cooler months. According to current regulations you can insulate the garage roof the same way as when fitting loft insulation in your home. To give it the best fire resistance, it is recommended to use fire rated insulation such as Rockwool RWA45. Garage roofs, like the walls, can have the insulation added to the inside or the outside of the construction. Choosing the right garage roof insulation for your property will largely depend on whether your garage has a pitched or a flat roof. Garages with pitched roofs can be insulated in much the same way as when fitting loft insulation in your home. High-quality PIR insulation boards in conjunction with a multifoil system will protect your garage from mould and damp, as well as make it a far more comfortable space. What’s more, these products are quick and easy to install, with no need for specialist tools.