For the tightest nooks and crannies of the attic many people choose loose fill insulation.
How to install attic insulation shield.
After your 2 x 4 box has been.
Once you have figured out where your chimney system will pass through you will build a simple framing box.
Calculate how much you need.
Climb into your attic and locate where your chimney system will enter this space.
Choose your insulation type.
For the majority of installations there are basically two different methods used to install radiant barrier foil in an attic.
Most common though is blanket style insulation made of either fiberglass or rock wool.
What you will need step 1.
The first is stapling foil to the bottom of the roof rafters the second is laying it out over the existing attic ceiling insulation.