The us department of energy estimates that up to 40 or more of your home s energy loss is due to air leakage.
Maine attic insulation requirements.
New construction including additions is not eligible for weatherization rebates.
There are minimum u factor requirements for windows and skylights as well.
The higher the r value the better the insulation.
Attics cathedral ceilings all wall cavities rim joists basement walls and crawl spaces.
The table below shows what levels of insulation are cost effective for different climates and locations in the home.
Special insulation exceptions related to ceilings with or without.
Meet the fenestration requirements in table r402 1 2.
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.
As an example foundation walls will now require continuous r 15 insulation and concrete floors will require r 1o.
You might open up your attic and find bare joists with fiberglass or cellulose insulation between the joists.
Inspecting your attic insulation.
The higher the r value the better the thermal performance of the insulation.
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.
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.
Efficiency maine recommends that the entire building envelope be insulated.
Injection foam insulation stops air leakage.
R value is a measure of insulation s ability to resist heat traveling through it.
The correct amount of attic insulation will help reduce your southern maine house bills during harsh winters.
Insulation level are specified by r value.
R 5 shall be added to the required slab edge r values for heated slabs.
R 5 insulation shall be provided under the full slab area for heated slabs in addition to slab edge insulation r values.
First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation.
Lifetime limit of one wall insulation one attic insulation one basement insulation and one air sealing rebate per building.
Insulation requirements for slab on grade floors are further specified in iecc section r402 2 10.
Injection foam insulation s higher r value.
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.
Fortunately this is a fairly easy fix.
