If you use the attic for living space you should insulate the ceiling of the attic if not then do the ceiling of the house itself.
R19 or r30 in attic.
What you want to do is fill the space between the framing members.
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.
Drill holes in the sheathing and blow insulation into the empty wall.
In florida 2 000 sq ft ceiling r19 to r30 reduces btus by 2 002 btus with r4 duct in the attic.
Don t stuff r 30 into a space that just fits r 19 5 1 2 because you will lose efficiently if you do.
Wall insulation whenever exterior siding is removed on an.
Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.
So if r 19 is designed for 3 1 2 and r 30 is designed for 5 1 2 and you still need an inch or so for ventilation of the plywood you need to have at least 10 rafters.
Get free shipping on qualified r21 r30 r19 fiberglass insulation or buy online pick up in store today in the building materials department.