R value is a measure of insulation s ability to resist heat traveling through it.
Maine attic insulation requirements.
Injection foam insulation s higher r value.
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.
Special insulation exceptions related to ceilings with or without.
Meet the fenestration requirements in table r402 1 2.
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.
The correct amount of attic insulation will help reduce your southern maine house bills during harsh winters.
Residential registered vendor for insulation and air sealing.
You might open up your attic and find bare joists with fiberglass or cellulose insulation between the joists.
Injection foam insulation stops air leakage.
Efficiency maine recommends that the entire building envelope be insulated.
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.
There are minimum u factor requirements for windows and skylights as well.
R 5 shall be added to the required slab edge r values for heated slabs.
Insulation requirements for slab on grade floors are further specified in iecc section r402 2 10.
Insulation level are specified by r value.
As an example foundation walls will now require continuous r 15 insulation and concrete floors will require r 1o.
New construction including additions is not eligible for weatherization rebates.
The us department of energy estimates that up to 40 or more of your home s energy loss is due to 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.
Upgrades completed within the last.
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.
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.
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.
Special insulation exceptions related to ceilings with or without attic spaces masonry veneer and thermally isolated sunrooms are set forth in iecc section r402.
