R Value Wood Siding

Siding wood bevel.

R value wood siding.

In construction the r value is the measurement of a material s capacity to resist heat flow from one side to the other. In hardwood it is 0 71. In simple terms r values measure the effectiveness of insulation and a higher number represents more effective insulation. Here s a brief list of siding materials and their r values.

Per inch r value of softwood is 1 41. R value of typical 3 4 thick pine softwood about r 1 25 30 wood door solid per inch. Know exactly how much you need with our project calculators. Soft wood lumber 1 25 2 inch nominal 1 inch 1 88 2 x 4 3 inch 4 38 2 x 6 5 inch 6 88 cedar logs and lumber 1 33 sheathing materials plywood 1 25 inch 0 31 inch 0 47 inch 0 63 inch 0 77 inch 0 94 fiberboard 2 64 inch 1 32.

Wall outside air film winter 0 17. 1 01 1 41 softwoods 0 71 hardwoods the r value of wood varies by wood density species moisture content. This value when compared to other insulating materials is actually pretty low. Most siding materials have an r value of less than 1.

If you are using thicker 5 8 inch shingles the installed siding will have an r value of at most about r 1 9. That includes standard vinyl steel or aluminum siding without added foam insulation. R value measures how well certain building insulation materials can resist heat. The higher the r value the greater the insulation performance.

It is so low that it is below many industry standards. Varies by species no authoritative source. If any readers think that the r value of cedar shingles might be higher it s worth consulting standard r value tables for a reality check. Assembly r value 1 assembly u value 1 u studs x u cavity x component.

When determining how much insulation you need don t guesstimate calculate.