How To Blow Insulation Into Walls From The Attic

If your walls and attic aren t insulated cellulose can be blown into your walls from the inside or outside through small 1 inch 2 5 cm holes and installing insulation in the attic is even easier.

How to blow insulation into walls from the attic.

Use a stud finder to locate each stud and any horizontal blocks that exist at or near the center of the wall s height. For the center areas hold the hose level and blow in insulation evenly until you ve reached your level lines photo 6. Blown in spray foam batts and blankets. Blowing in insulation step by step 1 use a stud finder to locate studs in the wall.

With boric acid added for fire resistance shredded recycled telephone books tax forms and newspapers all contribute to making safe cellulose insulation blown in cellulose is injected into the wall cavities by a series of holes drilled into either the inside or outside of the walls. Go slow to ensure the cavity gets packed tight. Insulating a completed wall with an insulation blower is easy. With a hole saw cut a small hole between 2 and 3 inches wide between two studs and near the top of the wall and place the cut portion aside you will reattach this later.

We offer our review of the three most popular types of attic insulation with a look at each one s pros and cons. Blown insulation both cellulose and fiberglass comes in bags and is available at most home and hardware stores. As the cavity fills pull the hose out of the hole. You may even get a bargain since some stores actually provide the equipment for free.

Place the head of the blown in insulation hose into the hole and continue to let it drop towards the bottom. To install blown in insulation in existing walls holes are drilled at the top of each stud space usually on the exterior and material is blown in via a long flexible hose. Use a drill and hole saw to make a penetration on center between each pair of studs into the. You can blow three rafter bays on each side of the attic from one position.

Wrap and hold a rag around the hose where it touches the wall and have your friend turn the blower on. Then mark each stud. Your options for attic insulation range from radiant barriers to sheets of mineral wool but most homeowners stick with products made from cellulose or fiberglass. Repeat this step between each pair of studs.