16 Inch Dense Pack Cellulose Roof

Fiberglass batts and cellulose used in walls earn similar conductive ratings between r 3 and r 4 per inch depending on density.

16 inch dense pack cellulose roof.

Pull out any existing fiberglass or make sure that you can dense pack the cellulose to the outside. Do not install cellulose below active roof leaks. What requirements are there for thermal insulation. I am thinking about this and my assembly would look like.

The 475 blog has a new post about unvented dense pack cellulose cathedral ceiling flat roof systems using intello membrane on the inside to allow the assembly to dry to the inside. Flat roof being dense packed the roof is opened up and cellulose is being blown into the roof cavity dense packing it. Because the space between the inner and outer walls creates a thermal break that reduces heat loss through the framing members the actual r value will. Consumer protection safety commission 16 cfr parts 1209 and 1404.

There are continuous soffit vents. For instance a 2 1 2 inch gap between the inner and outer frames creates a total 10 inch cavity that when filled with dense pack cellulose achieves a nominal insulating value of around r 31. This is a technique that dense packs 3 7 lb of cellulose per cubic feet into existing wall and roof cavities. And while the low density fiberglass insulation used in attics rates a much lower r 2 0 per inch there is typically very little space restriction in attics.

According to one source loose fill cellulose has an r value of r 3 8 per inch while dense packed cellulose at 3 5 pounds per cubic foot has a slightly lower r value of r 3 65 per inch. However according to bohdan boyko a technical rep from u s. When you dense pack an unvented roof here are factors to control for quality and performance. Address wet basements or crawlspaces before insulating your roof.

Shingles roof felt ice guard osb taped seams dense pack cellulose intello drywall paint. Flat roof there are a gazillion of these roofs that are uninsulated and need to be addressed. The house is a cape with a shed dormer roof with front pitch 6 12 and shed pitch 2 1 2 12. What is the r value of nu wool premium cellulose insulation.

The guy in the middle is jim fitzerald the absolute best guy in the world and he could not make it. Pull out the fiberglass and install r 20 dense pack cellulose by national fiber for the rafter bays at the cathedral and r 40 for the attic floor. The insulation installer is recommending opening the soffits and ridge.