To insulate the roof itself you either use spray foam or retrofit with it with rigid foam board.
Insulate tray roof.
Senior engineer manager at icynene john broniek makes the case for the unvented attic assembly and why insulating the underside of the roof makes sense.
In finished attic rooms with or without dormer insulate 2a between the studs of knee walls 2b between the studs and rafters of exterior walls and roof 2c and ceilings with cold spaces above.
Additionally insulation serves as a way to enhance sound proofing on the uppermost envelop of your house.
You can insulate a new or existing metal roof using a variety of different techniques.
Metal roofing is one of the most durable and long lasting roof materials on the market and can easily last for decades with little maintenance.
Make all cuts to the foam panels on the roof for more accurate cuts and quicker placement.
2d extend insulation into joist space to reduce air flows.
The best way to insulate a drop ceiling is to install batt insulation between the ceiling joists before installing the hanging grid.
Leave gaps between panels.
The quest for greater energy efficiency in buildings has led to increasing interest and need for insulation improvements in hvac equipment more airtight construction new materials and assemblies.
Try a spray foam insulation kit to fill cavities gaps cracks expansion joints and other sources of air leaks.
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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.
An advantage of spray foam is it s quick whereas foam board needs to be cut and measured which can be a chore.
Rolls are easy to transport and can be cut to the length you need.
To maximize the energy efficiency of these roofs the roof structure must be properly insulated.
In either case you will need to follow the general steps below to insulate your garage roof.
If you have a flat garage roof and an attic above you can install the garage insulation from below using a standard ladder.
Insulating in and around your roof attic space also prevents long term damage from moisture build up or ice damming which results from the warm air trying to escape through the apex of the roof but instead heating up the snow.
If you are seeking to add insulation to a suspended ceiling that is already in place however you will have to rest the batt insulation on top of.
Cut panels on roof.
This installation would proceed as any insulation installation.