Dense Pack Cellulose Insulation Cathedral Ceiling

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.

Dense pack cellulose insulation cathedral ceiling.

First cellulose has a natural density about two times that of fiberglass batts and four to five times that of loose blown fiberglass. Don t be dense cellulose and dense pack insulation. You achieve the maximum insulating capacity. Energy saver uses a long pvc pipe against the chimney to fill the cathedral ceiling s rafter bays with dense pack cellulose insulation.

Advantages to dense packing. Full of insulation and a well insulated building. There are several major advantages to dense packing completely filling a cathedral ceiling cavity with cellulose. The insulation installer is recommending opening the soffits and ridge.

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. This makes it much more difficult for air to move through the. The insulation will continue to keep the cavity filled. Many cellulose manufacturers and veteran installers claim problem free slant and unvented cathedral ceiling installations though i would recommend against it and that s probably because most roofing in existing homes does breathe to some extent and the dense pack significantly reduces air flow to the roof deck and can also safely store and.

Cellulose dense pack cathedral ceiling. It is a. Larry janesky of dr. In unvented cathedral ceilings greenfiber stabilized insulation or greenfiber loose fill insulation is dry dense packed over an air impermeable insulation as prescribed per irc 2009.

Energy saver suggests dense packing cellulose to insulate this cathedral ceiling where air flow will now be interrupted and insects and pests will be unlikely inhabitants. Cellulose is treated with borate a harmless naturally occurring mineral that has the ability to deter bugs. First the good stuff. One of the most effective ways of dealing with existing uninsulated frame walls is to blow cellulose into the wall cavities.

The pipe is inserted into each rafter bay through access openings made along the roof ridge. Figure 3 looks a whole lot better. Cathedral ceilings greenfiber stabilized insulation or greenfiber loose fill insulation is dry dense packed to a minimum density of 3 5 lb ft3 56 1 kg m3. I am thinking about this and my assembly would look like.

By filling the entire cavity with a dense pack you get the highest insulation ratings fiberglass or cellulose can achieve. Shingles roof felt ice guard osb taped seams dense pack cellulose intello drywall paint. Thank you glenn berger.