How Do I Insulate A Garage Roof

As you see in the photos i have already insulated the walls with r15 batt installation.

How do i insulate a garage roof.

The first thing you need to do is choose the type of insulation you are going to use. Similar to wearing a hat in the winter you need to make sure the top of the garage is protected to trap the heat in. Last chance to waterproof your wall. Here s my step by step process for how i added insulation to my garage.

If you didn t do that before you put the frame up you can still do it now although it s going to be. So before insulating go around the garage with a can of low expanding spray foam and seal all gaps and cracks that let in the daylight. If you have a flat garage roof and an attic above you can install the garage insulation from below using a standard ladder. Step 1 choose the type of insulation.

Some do it yourselfers commonly forget to leave air space between the fiberglass and the underside of the wood roof sheathing. It creates a breeding ground for mold and mildew and ruins the air trapping pockets that block heat flow. Look for water stains on the roof sheathing or damp or moldy spots on attic joists and existing insulation as a clue to where leaks might be. Consider all aspects of insulating your garage not just the walls but also the garage doors and the ceiling particularly if you plan to add a heating and or cooling system.

I wrote a tutorial on how to waterproof and seal your garage walls using drylok. Water is insulation s enemy. There are two main types of insulation. If you are insulating the garage ceiling not only by the truss level but also up by the roofline then you must leave at least 1 1 2 to two inches of air between the fiberglass and the underside.

How to insulate a garage step by step. Insulating the ceiling is the most important part of the garage because heat rises and escapes through 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. I do not have soffit vents but there is a ridge vent on the roof already installed.

And don t forget to take flooring into account. For example while an epoxy coating will add a protective layer to the floor it won t necessarily add insulating. Here is a guide on how you can insulate the garage roof in a few easy steps. The task of insulating a garage roof is not hard to complete if you follow a few tips and hints.

Box out light fixtures. In either case you will need to follow the general steps below to insulate your garage roof.