R value is a measure of insulation s ability to resist heat traveling through it.
Required thicknes for attic insulation in oregon.
While federal and in some cases state guidelines for insulation levels are merely recommendations the local building code is the true authority over insulation requirements.
Insulating materials are installed such that the manufacturer s r value mark is readily observable upon inspection.
Ceiling insulation must be much higher at r 30 and a raised floor must be at least r 13.
For block walls interior insulation must meet or exceed r 7 8 and exterior insulation must be r 6.
First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation.
Get fair costs for your specific project requirements.
The table below shows what levels of insulation are cost effective for different climates and locations in the home.
If you re thinking about putting new insulation in your home or just want to evaluate the insulation you already have you ll want to be able to make an informed choice.
Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.
Inspecting your attic insulation.
See professionally prepared estimates for attic insulation work.
Insulation level are specified by r value.
It covers specific information on attic insulation and ceiling insulation that will assist with proper installation to meet resnet grade 1 criteria for fiberglass and mineral wool batt insulation.
Covers topics from hatches to ventilation baffles and provides links to publications and videos for more information.
Framed wall insulation must meet or exceed r 13.
See typical tasks and time to insulate an attic along with per unit costs and material requirements.
Foam in place insulation can be blown into walls on attic surfaces or under floors to insulate and reduce air leakage.
The thermal resistance r value of insulation has been determined in.
The cost to insulate an attic starts at 1 68 3 25 per square foot but can vary significantly with site conditions and options.
Residential requirements for insulation are divided by the location in the home.
You can use the small pressurized cans of foam.
Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces.
Quality attic insulation is particularly important in portland oregon due to the fact that the weather can vary so widely over the course of the year.
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.
303 1 4 insulation product rating.
