How To Deck Attic With Blown Insulation

Baffles prevent insulation from blocking the vents.

How to deck attic with blown insulation.

Seal any gaps around the perimeter of the attic with caulk and install baffles on the roof decking over the soffit vents. Place the 1 by 6 boards down over the floor joists in the attic so that they run at a perpendicular angle to the joists. They often simplify insulation and air sealing details versus conventional insulation on the floor of the attic that may be compromised by numerous penetrations from recessed lighting fans equipment and ductwork. We offer our review of the three most popular types of attic insulation with a look at each one s pros and cons.

For the center areas hold the hose level and blow in insulation evenly until you ve reached your level lines photo 6. Step 2 drill 3 inch screws through the boards and into the joist where they cross over the joists. Run the boards down along the side of the attic to create the first row. Blowing insulation into walls is best left to the pros because it involves drilling into stud spaces that may contain electrical.

Building air tightness would now preside at the top of the building enclosure at the roof deck and attic walls gables. Step 2 lay sheets of the plywood onto the floor spanning the joists with a 1 2 inch space between the walls of the attic and the edges of the plywood. Handy homeowners can install blown in insulation in the attic. Make sure the fill s depth is uniform across the attic.

To make it easy to eyeball how level the material is as you blow it in screw depth guides to joists throughout the space. Your options for attic insulation range from radiant barriers to sheets of mineral wool but most homeowners stick with products made from cellulose or fiberglass. Move across the attic until you ve hit your desired height at every point. Blow in insulation until the hopper is empty.

Blown in spray foam batts and blankets.