Batts Which Direction Attic Knee Wall

In tight attics or odd shaped wall conditions i e.

Batts which direction attic knee wall.

Kneewalls short walls under sloped ceilings are common in story and a half homes and in bonus rooms above garages. Case study attic knee walls in littleton. The interior gable wall obviously extends to the ridge. I have a room with a vaulted ceiling.

Then cover that same area with an r 8 fsk affixing it using cap nails. Another alternative for knee walls conditions is to remove and reinstall the batt insulation to qii standards. Finish interior of knee wall. Until recent building code changes these walls have essentially been insulated the same way since the beginning and are.

The bottom plate of the knee wall rests on the open floor joists and the top plate is secured against the roof deck rafters. I need a way to hold batt insulation in the stud bay so they do not fall out into the attic. Install an air barrier on the exterior of attic knee wall insulation and to block open floor joist cavities under attic knee walls. 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 knee wall cavities were filled with unfaced r13 batts and the roof rafters were filled with r19 faced batts although several of the batts had come unattached and are lying on the floor of the knee wall. They are present in most any home that has ceilings of different heights. 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. The green curmudgeon wrote another article on poorly installed batts recently with photos of knauf fiberglass.

Rake walls it s easier to handle than plywood or thermo ply and still gives you an r 19 r121 assembly. Product installed in the back of the knee wall cavity r 19 and a radiant reflector with r 13 fiberglass batt and 0 75 furring on the back of the knee wall prior to placing the knee wall and nailing it to the floor and rafters attach a 1 x 2 nominal furring strip to the back of each knee wall stud. Install a top and bottom plate or blocking at the top and bottom of all knee wall cavities. Speaking of fiberglass batt insulation carl seville a k a.

I would like to insulate this gable wall against the attic. On the opposite side of the gable wall is a vented attic space with insulation on the attic floor. Install insulation without misalignments compressions gaps or voids in all knee wall cavities. 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.

When i accessed the knee wall attic i discovered that both the roof deck and the knee walls were insulated with fiberglass batts.