Insulation Board Under Siding

The method works for both new construction and remodeling and doesn t affect siding and trim details very much.

Insulation board under siding.

0 25 in x 4 ft x 50 ft. But if you use wood clapboard siding foam sheathing can cause trouble. 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. The nails have a plastic cap that keeps them from damaging the foam.

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. To be completely efficient this insulation type has to mold perfectly with the inside of your home siding. To secure the foam use two inch cap nails. Wall 3 r 19 in the cavity plus r6 1 foam board under the vinyl.

0 25 in x 4 ft x 50 ft 1 faced polystyrene foam board insulation item 304092 model 100000050460. It comes in standard size 4 8 sheets and smaller sizes in many different thicknesses from 1 4 inch to 2 inches. 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.

The panels provide a continuous energy efficient surface. Apply sealant around windows doors and trim. The studs conduct more heat than the insulation between them. Some people use roofing nails but if a strong gust of wind gets under the siding it may not hold.

Wall 2 insulated with high density spray foam at a nominal 4 inches in the cavity. 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. This eliminates thermal bridging which is the energy lost through wall studs. Wall 4 r 19 in the cavity plus r12 2 foam board under the vinyl.

Wall 1 insulated with only r 19. Foam board insulation is easy to use and is a great diy way to add some insulation. Kingspan insulation r 1 common. Installation of this insulation type under fiber cement siding can create an incredible 600 more energy efficient home.

For a cavity r value of 24. Bottom line is exterior foam insulation is a good investment.