How To Insulate A Flat Garage Roof

We are only looking at how to insulate a flat garage roof in detail as this is the most common construction.

How to insulate a flat garage roof.

Whatever your reason for installing garage insulation it needs to be done correctly to ensure that you get the maximum benefit from your investment. Garage roof sheets are made from a variety of materials and each material comes with its own benefits so it is important to select the best one for your garage roof. This article will outline these unique features and offer advice to help you put theory into practice. The u values needed to achieve this on a flat roof are shown below.

Step 1 choose the type of insulation. Metal roof sheets metal garage roof sheets are popular due to their ability to withstand extreme weather conditions affordability and ability to withstand high temperatures. Warm deck flat roof insulation is now the standard way to insulate a flat roof click to enlarge flat roofs for example on extensions bathrooms and dormer windows are not the best of ideas. Cold roof systems are highly inadvisable as insulation from the inside will inevitably lead to the formation of condensation.

Most garages have flat roofs which means that there is less than 10 degrees of pitch in the roof. However if you have a cathedral style garage roof you will need a scaffolding to get into the upper areas of the roof. A single garage roof without decking will take about 4 hours. A double garage flat roof will take a day if you only replace the felt but with the decking too allow a day and a half.

Here is a guide on how you can insulate the garage roof in a few easy steps. Achieving a u value of 0 20w m meaning your roof will be better insulated than your walls will need 120mm thickness of rigid foam or 200mm of mineral wool or natural insulation. If you have a flat garage roof and an attic above you can install the garage insulation from below using a standard ladder. A cold roof is when your insulation material is fixed between the roof joists.

With a flat roof this issue does not arise but the u value constraint and the amount of insulation needed is just the same. Cold roof a very bad idea. Flat roofs are harder to insulate through diy and it s recommended that your find a professional to help with installation. To produce a hot roof rigid insulation is fitted outside above the weatherproofing.

This is then covered with a further weatherproofing layer. In either case you will need to follow the general steps below to insulate your garage roof. They lose loads of heat and are prone to leaking causing the materials to deteriorate. The task of insulating a garage roof is not hard to complete if you follow a few tips and hints.