Maine Attic Insulation Requirements

You might open up your attic and find bare joists with fiberglass or cellulose insulation between the joists.

Maine attic insulation requirements.

Attics cathedral ceilings all wall cavities rim joists basement walls and crawl spaces. Insulation requirements for slab on grade floors are further specified in iecc section r402 2 10. 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. R 5 insulation shall be provided under the full slab area for heated slabs in addition to slab edge insulation r values.

The higher the r value the better the thermal performance of the insulation. 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. Insulation level are specified by r value. Fortunately this is a fairly easy fix.

Upgrades completed within the last. Injection foam insulation s higher r value. Special insulation exceptions related to ceilings with or without. 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.

As an example foundation walls will now require continuous r 15 insulation and concrete floors will require r 1o. Inspecting your attic insulation. 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. The table below shows what levels of insulation are cost effective for different climates and locations in the home.

The correct amount of attic insulation will help reduce your southern maine house bills during harsh winters. There are minimum u factor requirements for windows and skylights as well. The us department of energy estimates that up to 40 or more of your home s energy loss is due to air leakage. 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 higher the r value the better the insulation. Insulation requirements for slab on grade floors are further specified in iecc section r402 2 10. 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. Residential registered vendor for insulation and air sealing.

First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation. Efficiency maine recommends that the entire building envelope be insulated. New construction including additions is not eligible for weatherization rebates. R value is a measure of insulation s ability to resist heat traveling through it.

R 5 shall be added to the required slab edge r values for heated slabs. Meet the fenestration requirements in table r402 1 2.