Insulation Board Under Siding

To be completely efficient this insulation type has to mold perfectly with the inside of your home siding.

Insulation board under siding. It comes in standard size 4 8 sheets and smaller sizes in many different thicknesses from 1 4 inch to 2 inches. To secure the foam use two inch cap nails. In reality rigid foam board which sometimes comes in fanfold usually only has an insulating factor of r 1 and does not add any appreciable insulation effect to your home. In fact you can check if it is a correct insulation installation by pressing on the house siding.

The nails have a plastic cap that keeps them from damaging the foam. 0 25 in x 4 ft x 50 ft 1 faced polystyrene foam board insulation item 304092 model 100000050460. Foam board insulation is easy to use and is a great diy way to add some insulation. Wall 4 r 19 in the cavity plus r12 2 foam board under the vinyl.

Some people use roofing nails but if a strong gust of wind gets under the siding it may not hold. The method works for both new construction and remodeling and doesn t affect siding and trim details very much. Wall 2 insulated with high density spray foam at a nominal 4 inches in the cavity. Using exterior rigid foam board insulation is a great way to make a building more energy efficient quieter and more likely to prevent moisture infiltration problems.

Wall 1 insulated with only r 19. Moisture can get trapped between the siding and the foam leading to paint failure and causing clapboards to cup and curl. Insulated foam sheets are also used as an insulated sheathing underlayment for exterior siding. Bottom line is exterior foam insulation is a good investment.

This eliminates thermal bridging which is the energy lost through wall studs. Fit the rigid foam insulation snugly and seal all seams with the specialized tape. The studs conduct more heat than the insulation between them. Kingspan insulation r 1 common.

And even though some manufacturers call it rigid foam insulation for the purpose of vinyl siding it basically has the same insulating value as a piece of plywood. 0 25 in x 4 ft x 50 ft. For a cavity r value of 24. Apply sealant around windows doors and trim.

Some types of thicker foam board insulation are available but they may need to be special ordered. Installation of this insulation type under fiber cement siding can create an incredible 600 more energy efficient home.