Batts Which Direction Attic Knee Wall

Rake walls it s easier to handle than plywood or thermo ply and still gives you an r 19 r121 assembly.

Batts which direction attic knee wall.

In tight attics or odd shaped wall conditions i e. A knee wall is generally referred to any vertical wall between the conditioned space and an attic. Then cover that same area with an r 8 fsk affixing it using cap nails. I have a room with a vaulted ceiling.

I would like to insulate this gable wall against the attic. Until recent building code changes these walls have essentially been insulated the same way since the beginning and are. Another alternative for knee walls conditions is to remove and reinstall the batt insulation to qii standards. Although kneewalls can help turn attics into living space they often present insulation challenges most builders install fiberglass batts between the studs and some type of blown insulation between the floor joists.

Knee walls are the bane of energy and comfort in homes by which i mean they are vertical half height walls built to convert normally unconditioned attic into liveable space. The interior gable wall obviously extends to the ridge. On the opposite side of the gable wall is a vented attic space with insulation on the attic floor. Rather than being a bully like guardian did to me a couple of years ago they commented on the article and asked for a dialogue on how to get better installation in the.

Install an air barrier on the exterior of attic knee wall insulation and to block open floor joist cavities under attic knee walls. Finish interior of knee wall. If i place vertical runs of r 30 unfaced against the current plastic barrier i d use a perforated barrier to hold them in place. They are present in most any home that has ceilings of different heights.

They are 2 4 construction kraft faced r 11 batts in the wall with the paper facing the drywall and a plastic vapor barrier in the knee wall attic. When i accessed the knee wall attic i discovered that both the roof deck and the knee walls were insulated with fiberglass batts. The green curmudgeon wrote another article on poorly installed batts recently with photos of knauf fiberglass. Kneewalls short walls under sloped ceilings are common in story and a half homes and in bonus rooms above garages.

Install insulation without misalignments compressions gaps or voids in all knee wall cavities. Case study attic knee walls in littleton. Speaking of fiberglass batt insulation carl seville a k a. I need a way to hold batt insulation in the stud bay so they do not fall out into the attic.

The bottom plate of the knee wall rests on the open floor joists and the top plate is secured against the roof deck rafters.