Installing Foam Board Insulation Ceiling

R 13 1 polyiso rigid foam insulation board 613010 the home depot after installing and taping the r max board i managed to find blow in insulation the nice white cellulose type for 3 00 55 gallon bag.

Installing foam board insulation ceiling.

Leave an air gap between the roof sheathing and the board. Hire a pro to install spray foam insulation. Foam board the last option that i considered and the one i m using is foil faced polyiso insulation board. Foam board insulation would be a more economical especially if you are supplying the labor see photo.

The air space will be continuous down to the soffit vents and. How to install astroboard polystyrene foam board insulation. Foam blocks airflow needs no vapor barrier and has a higher r value per inch than loose fill. It comes in standard size 4 8 sheets and smaller sizes in many different thicknesses from 1 4 inch to 2 inches.

In most cases however insulation will not help prevent moisture. Some types of thicker foam board insulation are available but they may need to be special ordered. I m using 2 foam board 2 foil faced polyiso r value is approximately r14 fastened to the bottom of the 2 6 truss chord which leaves a nice 2 1 2 air space. Got it at the home depot here s a link rmax thermasheath 3 2 in.

Spray foam is a very expensive option however. There s two ways you can go about with foam board insulation. Press the cut insulation board to fit between the rafters or joists. A brief snippet of how and why i used rigid foam insulation for some areas of the tiny house.

Always cover the tops of the ceiling joists to make sure the insulation is deep enough to reach your target r value and to prevent thermal bridging the heat loss that occurs through the wood framing. Secondly and this is the best way you can install a drywall to frame the wall before applying foam board insulation. The brand i used was r max thermasheath. Align the front of the board with the face of the rafter or joist.

Firstly you can apply it directly onto the house s concrete walls with the help of a construction adhesive that will hold it in place.