If you have a flat garage roof and an attic above you can install the garage insulation from below using a standard ladder.
How to insulate a garage roof uk.
A warm roof on the other hand has insulation added above the joists with a waterproofing layer added on top.
In either case you will need to follow the general steps below to insulate your garage roof.
Here s my step by step process for how i added insulation to my garage.
Make sure that all of the pieces are the same size so that they fit into the trusses.
When it comes to insulating a flat roof you can go for two options.
Measure the height and width between the framing in the ceiling and pre cut the pieces you ll need.
For a cold roof where the insulation such as kooltherm k7 pitched roof board is fixed between the roof joists the roof needs to be ventilated by leaving a 50 mm gap above the insulation to create an air gap which is vented to the outside.
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To install the insulation overhead you need to staple the pieces to the roof trusses.
This will help while you re up on the ladder.
I wrote a tutorial on how to waterproof and seal your garage walls using drylok.
How to insulate a garage step by step.
This will prevent condensation forming in the roof.
Last chance to waterproof your wall.
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However if you have a cathedral style garage roof you will need a scaffolding to get into the upper areas of the roof.
Just remember to use thicker r 40 insulation.
A cold roof is when your insulation material is fixed between the roof joists.
A warm roof or a cold roof.
Flat roofs especially with the uk s ever changing weather are prone to pools of water forming on the surface.
If you didn t do that before you put the frame up you can still do it now although it s going to be.
If 180mm is to be installed then 100mm board might be introduced between the rafters there has to be a minimum 25mm air gap between the insulation and the underside of the tiles or slates with an 80mm board running across the rafters.
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With a warm roof the usual process is to split the insulation into two layers.
Insulating the ceiling of your garage involves the same process as insulating the walls.
You should use some foil tape to make sure that the insulation is stable on the roof edges.
Such water pools pose insulation problems.
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