Installing Knee Wall Attic Insulation

Bring the attic inside insulating between the rafters simplifies the air sealing details.

Installing knee wall attic insulation.

More details online 1. Here are the three keys to sheathing an attic kneewall properly. One of the best methods is rigid foam board with sealed joints over insulation in the knee wall. Insulating and air sealing knee walls unvented version.

Keep the attic outside insulating a kneewall and the attic floor behind the kneewall is possible but tricky. The advantage here is that your knee wall is probably already insulated this way so it s just a matter of buying some foam so cheap. Friction fit insulation between and parallel to the framing members in full contact with rigid backing top and bottom plates. This is not very easy in most of the older houses we work on because the hatches and attics are too small to get rigid foam board through.

Verify that top bottom plates and a fire rated rigid backing have been installed. The disadvantage is that it would be very very hard to reach the desired r value from r 49 to r 60 depending on climate for attic insulation. Insert each strip of faced insulation between the studs in the knee wall with the facing directed toward the living space of the attic. 7 staple the edges of the facing into each of the studs.

Now that the kneewall is. Verify insulation material is the correct width and r value. Sheathe the kneewall during framing. There are as many ways to do it as there are people who do it.