Insulation Recommendations For Attic

The recommended r value for attic insulation in ontario is between r 50 and r 60.

Insulation recommendations for attic.

Your attic should have a certain amount of insulation in it and the recommended level of insulation for your attic is dependent on where you live. Contractor or insulation installer s fee. Typical recommendations for exterior walls are r 13 to r 23 while r 30 r 38 and r 49 are common for ceilings and attic spaces. Rigid foam boards trap air or another gas to resist conductive heat flow.

R values of common types of insulation. Batt and roll insulation and loose fill sometimes known as blown in insulation. R value is a measure of insulation s ability to resist heat traveling through it. Unlike fiberglass insulation.

See install batt and roll insulation for details. Batt and roll insulation works well between joist and stud spaces or if you have a wide open space or a crawlspace. You can mix the type and material of insulation too. The r value of the insulation for every inch of thickness depends on the type of insulation.

Insulation level are specified by r value. Loose fill cellulose insulation is composed of pulverized paper and fabric material treated with a flame retardant. Insulation materials run the gamut from bulky fiber materials such as fiberglass rock and slag wool cellulose and natural fibers to rigid foam boards to sleek foils. Achieving greater r values in attics.

Bulky materials resist conductive and to a lesser degree convective heat flow in a building cavity. Inspecting your attic insulation. First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation. Loose fill blown in insulation is best for tight spaces or if your attic already has a layer of insulation.

See the department of energy s doe ranges for recommended levels of insulation below. The ideal attic insulation r value is different than the ideal wall insulation r value. The two distinct types of attic insulation are loose fill material also commonly known as blown in insulation and batting. Insulation ratings can be improved by adding more layers of insulation.

According to home advisor insulating your attic can cost between 1700 to 2100. Recommended home insulation r values. Recommended inches of cellulose attic insulation. Square footage of your attic.

So it s time to pay close attention to what s happening up there. Type and material of your insulation. The main factors that impact the cost are. The higher the r value the better the thermal performance of the insulation.