Dense Pack Cellulose Insulation Attic

The purpose of the fiberglass is to keep the cellulose in place.

Dense pack cellulose insulation attic.

Install a layer of fiberglass at the bottom of the truss cavity staple fabric to the bottom of the trusses and dense pack the cellulose above the fiberglass. Loose filled sanctuary loose fill can also be blown in or dense packed into walls and floors and it works great in attics. Professional insulation contractors know how much each type of cellulose can settle and they can counteract the phenomenon by installing extra. A quick look at an dense packed cellulose insulation installation in progress.

Spray foam installs faster but cellulose costs less. Dense pack cellulose does an excellent job of stopping air movement and its hygroscopic nature allows it to absorb and release moisture throughout the seasons. I ve had three cellulose insulation contractors tell me how they propose to insulate the cathedral ceiling. When evenly packed dense pack cellulose insulation effectively seals the whole cavity.

There is no such thing as a bad insulation only bad applications. Sure there s insulation in your attic and crawlspace. The biggest weakness for dense blown cellulose is the lack of understanding of its qualities and effectiveness. Dense packed cellulose insulation provides excellent thermal resistance an r value of 3 0 3 5 per inch sound proofs the wall and greatly retards air flow.

The more insulation the better. Or attic staircase hatches. In spite of all their benefits neither fiberglass nor cellulose insulation provides an adequate air seal. Read this article to learn how to install dense pack cellulose insulation correctly.

But there s probably nothing to prevent air from moving past plumbing air duct and electrical penetrations. It can often be installed over existing insulation without removing the old insulation letting you reach the necessary r value with no fuss. I love cellulose insulation. 3 normally i keep quiet and move on but sometimes the nonsense can result in real damage particularly the stuff about dense.

Cellulose insulation has an r value range of 3 6 to 3 8. 1 in fact i love all insulations. Or whole house fans. Called dense packing the cellulose is slightly compressed during the installation process allowing more fibers to fit in the same space.

2 but it irritates the heck out of me when folks say stuff that is not true particularly salesmen. Like wool insulation cellulose is frequently used for residential buildings.