How To Insulate An Attic Plus Porch Roof Rafters

If your attic is going to be converted into livable space then you will need to insulate the roof rafters.

How to insulate an attic plus porch roof rafters.

With a warm roof the usual process is to split the insulation into two layers. Use 3 8 inch heavy duty staples every six inches. On new construction in northern nj spray foam companies are huge advocates of insulating at the rafters. To install the air chutes staple them directly to the roof decking.

I am an advocate of spray foam but my experience tells me that unless there is much ductwork in the attic the attic plane is very complex or there is a very low ceiling height i would rather seal and insulate any ductwork properly and insulate at the attic floor to keep the overall. Staple it to the rafters or scabbed on boards with a staple gun so that the paper backing is toward the interior of the room to act as a vapor barrier. Step 3 installing the insulation. Airspace from the soffit to the ridge by installing a continuous air chute in each rafter bay.

How to insulate roof rafters. Insulating a finished attic there are two basic ways to insulate a finished attic. If 180mm is to be installed then 100mm board might be introduced between the rafters there has to be a minimum 25mm air gap between the insulation and the underside of the tiles or slates with an 80mm board running across the rafters. Step 2 cutting and fitting the insulation.

In this case the area behind the knee wall will be uncomfortably hot or cold. Install ventilation baffles into the space between the rafters before you install the insulation usually by stapling into place. Step 1 measuring the space. Plan to pull up the flooring and layer new insulation on top of the old.

To cut blanket style insulation place the product over a piece of plywood with its paper or foil side down. Lay a two by four on top temporarily compressing the insulation to a manageable. Staple them directly to the roof decking for better insulating roof rafters. To effectively ventilate your roof create a 1 in.

If only the living space will be insulated wrap the insulation around the room s walls and ceiling and then continue along the floor of the non living space. Attach the insulation to the rafter scab board by the paper flange so as not to compress the fiberglass.