Maine Attic Insulation Requirements

R value is a measure of insulation s ability to resist heat traveling through it.

Maine attic insulation requirements.

Residential registered vendor for insulation and air sealing. 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. 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. Another major performance issue with insulation and energy savings is its air sealing capability.

R 5 insulation shall be provided under the full slab area for heated slabs in addition to slab edge insulation r values. The table below shows what levels of insulation are cost effective for different climates and locations in the home. There are minimum u factor requirements for windows and skylights as well. The higher the r value the better the thermal performance of the insulation.

New construction including additions is not eligible for weatherization rebates. Injection foam insulation stops air leakage. The correct amount of attic insulation will help reduce your southern maine house bills during harsh winters. The higher the r value the better the insulation.

Upgrades completed within the last. Attics cathedral ceilings all wall cavities rim joists basement walls and crawl spaces. R 5 shall be added to the required slab edge r values for heated slabs. You can sister the joists by cutting 2 x8 boards the same length as the joists applying construction adhesive and affixing each to a joist with nails.

Fortunately this is a fairly easy fix. 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. Special insulation exceptions related to ceilings with or without attic spaces masonry veneer and thermally isolated sunrooms are set forth in iecc section r402. 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.

Efficiency maine recommends that the entire building envelope be insulated. Insulation requirements for slab on grade floors are further specified in iecc section r402 2 10. Inspecting your attic insulation. Injection foam insulation s higher r value.

As an example foundation walls will now require continuous r 15 insulation and concrete floors will require r 1o. Meet the fenestration requirements in table r402 1 2. Special insulation exceptions related to ceilings with or without. You might open up your attic and find bare joists with fiberglass or cellulose insulation between the joists.

Insulation level are specified by r value. Insulation requirements for slab on grade floors are further specified in iecc section r402 2 10.