Dense Pack Cellulose Insulation Cathedral Ceiling

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.

Dense pack cellulose insulation cathedral ceiling.

Cellulose dense pack cathedral ceiling. One of the most effective ways of dealing with existing uninsulated frame walls is to blow cellulose into the wall cavities. First the good stuff. Thank you glenn berger.

This makes it much more difficult for air to move through the. Don t be dense cellulose and dense pack insulation. First cellulose has a natural density about two times that of fiberglass batts and four to five times that of loose blown fiberglass. The insulation will continue to keep the cavity filled.

Cellulose is treated with borate a harmless naturally occurring mineral that has the ability to deter bugs. There are several major advantages to dense packing completely filling a cathedral ceiling cavity with cellulose. 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. 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.

How can one be certain that the cavities are full and are there moisture concerns. You achieve the maximum insulating capacity. Full of insulation and a well insulated building. The insulation installer is recommending opening the soffits and ridge.

Larry janesky of dr. It is the dense packing of unvented cathedral ceilings or unvented flat roofs that is the problem. Energy saver uses a long pvc pipe against the chimney to fill the cathedral ceiling s rafter bays with dense pack cellulose insulation. By filling the entire cavity with a dense pack you get the highest insulation ratings fiberglass or cellulose can achieve.

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 pipe is inserted into each rafter bay through access openings made along the roof ridge. Advantages to dense packing. 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.

So bees ants and termites won t find that ceiling so inviting. Shingles roof felt ice guard osb taped seams dense pack cellulose intello drywall paint. 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.