Finishing Attic Walls

The location of the top of the knee is marked and after checking the level long boards are attached to the ceiling joists.

Finishing attic walls.

In rare cases especially in new construction homes the attic may have been built unfinished with the correct flooring in place with the idea that the homeowner could later on finish the space. Step 1 check the ceiling height. For a finished attic to be to code it must satisfy the same living requirements of other rooms sometimes called the rule of sevens any living space in a home needs to have at least 7 feet 2 1 m of clearance from the floor to the ceiling and there needs to be at least 70 square feet of space available at least 7 feet 2 1 m in each direction. If you re finishing your attic insulating it to the proper r value can cause a dramatic loss of headroom if you limit yourself to fiberglass batts.

I tried linking panels with spray foam instead of taping. I sealed all the gaps in the wall with canned foam and the xps is glued around the perimeter. Finishing the attic my preference is to push the knee walls close to the eaves creating as much floor space as possible. To meet all three goals insulating your finished attic ventilating the roof and maximizing headroom use a combination of dense batt insulation rigid foam sheeting and air chutes.

Use r 30 insulation for the ceiling and r 13 for the walls. Enforcement varies but codes typically say that at least half of a finished attic must be at least 7 feet high and that this area must be a minimum of 7 feet wide and 70 square feet. Don t mash or compress the insulation into the space. I ve attached a few before and after pics.

Now let s read about the steps for properly finishing the attic walls and ceiling. Knee walls and flat ceilings running plumb from the roof rafters to the attic floor joists knee walls eliminate some of the roof s slope at the expense of less square footage of floor space in the. It needs a certain amount of loft to work properly. In the first step a knee wall is installed.

At least 50 step 2 make sure the attic has a full size staircase. There are no special exceptions just because it s living space in the attic. I used xps because it was on sale for crazy cheap and i haven t put up the ignition barrier yet. Staple insulation between the wall studs and ceiling joists image a.

Every attic is different but a few established norms and practices will guide your renovation. Step 1 framing of the top and sides of the knee wall. I have a very similar attic wall to yours. Finishing an attic turns the finished parts into standard living spaces making them subject to all of the same rules that apply to other living areas of the home.

Follow the rule of 7s. Low cabinets and bookcases fit snugly in the space under slanted ceilings.