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.
Maine attic insulation requirements.
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.
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.
Residential registered vendor for insulation and air sealing.
As an example foundation walls will now require continuous r 15 insulation and concrete floors will require r 1o.
Another major performance issue with insulation and energy savings is its air sealing capability.
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.
Upgrades completed within the last.
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.
Inspecting your attic 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.
New construction including additions is not eligible for weatherization rebates.
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 us department of energy estimates that up to 40 or more of your home s energy loss is due to air leakage.
There are minimum u factor requirements for windows and skylights as well.
Insulation requirements for slab on grade floors are further specified in iecc section r402 2 10.
The correct amount of attic insulation will help reduce your southern maine house bills during harsh winters.
The table below shows what levels of insulation are cost effective for different climates and locations in the home.
Efficiency maine recommends that the entire building envelope be insulated.
Fortunately this is a fairly easy fix.
Lifetime limit of one wall insulation one attic insulation one basement insulation and one air sealing rebate per building.
The higher the r value the better the insulation.
Injection foam insulation s higher r value.
Insulation requirements for slab on grade floors are further specified in iecc section r402 2 10.
Meet the fenestration requirements in table r402 1 2.
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.
Attics cathedral ceilings all wall cavities rim joists basement walls and crawl spaces.
Insulation level are specified by r value.
R 5 insulation shall be provided under the full slab area for heated slabs in addition to slab edge insulation r values.
