16 Inch Dense Pack Cellulose Roof

However according to bohdan boyko a technical rep from u s.

16 inch dense pack cellulose roof.

Flat roof being dense packed the roof is opened up and cellulose is being blown into the roof cavity dense packing it. Pull out any existing fiberglass or make sure that you can dense pack the cellulose to the outside. The guy in the middle is jim fitzerald the absolute best guy in the world and he could not make it. There are continuous soffit vents.

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. 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. What is the r value of nu wool premium cellulose insulation. Shingles roof felt ice guard osb taped seams dense pack cellulose intello drywall paint.

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. When you dense pack an unvented roof here are factors to control for quality and performance. Fiberglass batts and cellulose used in walls earn similar conductive ratings between r 3 and r 4 per inch depending on density. 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 house is a cape with a shed dormer roof with front pitch 6 12 and shed pitch 2 1 2 12. Section r 302 10 of the 2012 irc requires cellulose insulation to pass the following tests. Consumer protection safety commission 16 cfr parts 1209 and 1404. Greenfiber the fiberized cellulose introduced in 1990 has about the same r value per inch.

What requirements are there for thermal insulation. 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. Address wet basements or crawlspaces before insulating your roof. Flat roof there are a gazillion of these roofs that are uninsulated and need to be addressed.

I am thinking about this and my assembly would look like. The insulation installer is recommending opening the soffits and ridge. 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.