Maine Attic Insulation Requirements

Special insulation exceptions related to ceilings with or without attic spaces masonry veneer and thermally isolated sunrooms are set forth in iecc section r402.

Maine attic insulation requirements.

There are minimum u factor requirements for windows and skylights as well. Residential registered vendor for insulation and air sealing. Injection foam insulation stops air leakage. The following summary details the requirements by building enclosure element for maine zone 6 all of maine is zone 6 except aroostook county which is zone 7.

Meet the fenestration requirements in table r402 1 2. Injection foam insulation s higher r value. Special insulation exceptions related to ceilings with or without. Attics are one of the easiest places in a house to insulate especially if you d like to cap your existing attic insulation add insulation to what you already have.

New construction including additions is not eligible for weatherization rebates. Attics cathedral ceilings all wall cavities rim joists basement walls and crawl spaces. The correct amount of attic insulation will help reduce your southern maine house bills during harsh winters. R value is a measure of insulation s ability to resist heat traveling through it.

Upgrades completed within the last. Insulation level are specified by r value. Efficiency maine recommends that the entire building envelope be insulated. The higher the r value the better the thermal performance of the insulation.

Insulation s ability to reduce heat transfer is rated in terms of its r value with a higher r value making the home more efficient and comfortable. 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. Inspecting your attic insulation. As an example foundation walls will now require continuous r 15 insulation and concrete floors will require r 1o.

Insulation requirements for slab on grade floors are further specified in iecc section r402 2 10. R 5 shall be added to the required slab edge r values for heated slabs. Fortunately this is a fairly easy fix. You might open up your attic and find bare joists with fiberglass or cellulose insulation between the joists.

The higher the r value the better the insulation. R 5 insulation shall be provided under the full slab area for heated slabs in addition to slab edge insulation r values. Insulation requirements for slab on grade floors are further specified in iecc section r402 2 10. Lifetime limit of one wall insulation one attic insulation one basement insulation and one air sealing rebate per building.

First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation. The us department of energy estimates that up to 40 or more of your home s energy loss is due to air leakage.