Make sure it is flush against the wood as even a 1 inch gap can cause a 20 percent heating loss.
Insulate attic rafters illinois.
For rolled insulation place it between roof rafters.
You should only insulate your rafters if you have baffles installed to separate the actual rafters themselves from the insulation.
You can buy air ducts that staple to the inside of your roof above the eave vents and fit between the rafters.
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.
You can use rigid foam panels or do as tom silva does with nearly all houses these days.
Walls between living spaces and unheated garages shed.
Place the plastic sheeting on top of the rolled insulation.
If your attic is usable space but not lived in then you won t need to insulate the roof rafters as long as the ceiling floor that separates the roof from your living area below is insulated.
Together with an expert you should inspect and consider the condition of your attic s current insulation if it has any.
Extend insulation into joist space to reduce air flows.
Achieving greater r values in attics.
Attic baffles also known as rafter vents go along the sides of your attic and keep your soffit vents from being blocked by insulation.
All exterior walls including.
Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces.
Home ceilings are usually insulated in order to seal off the extreme temperatures in your attic.
Ceilings with cold spaces above.
You can achieve better thermal performance in your attic by adding an.
In finished attic rooms with or without dormer insulate.
The will hold open an air gap of approximately 1 inch to allow airflow past a layer of insulation.
The ones i ve used are made of styrofoam and iirc they cost around 2.
Between the studs of knee walls.
Then feed the rolled insulation under wires and pipe if either is present.
This is an important step as you may find roof problems or rafter damage which a roofer should correct before you install new insulation.
Between the studs and rafters of exterior walls and roof.
The higher the r value the better the thermal performance of the insulation.
