Seattle crawl space and attic services.
Attic insulation r value seattle.
Batts are approximately r 3 to r 3 8 per inch of thickness.
Proper attic ventilation is important to keep your insulation and attic space dry and healthy.
If your insulation is lower than the joists in your roof then you need more insulation.
We are the number one service provider for attic and crawl space cleaning insulation installation and removal and animal proofing in the seattle and surrounding areas.
The power of cleanliness often neglected the attic and crawl spaces play a crucial role in maintaining a safe and energy efficient home.
Loose fill cellulose is r 3 13 to 3 7 per inch and loose fill.
Climate zone 2 r 25 minimum rigid board or air impermeable insulation r value.
Know exactly how much you need with our project calculators.
The suggested r value for attic insulation is r38 or about 10 14 inches of insulation.
K for single rafter or joist vaulted ceilings the insulation may be reduced to r 38.
The higher the r value the greater the insulation performance.
Intermediate framing denotes standard framing 16 inches on center with headers insulated with a minimum of r 10 insulation.
Does my attic need to be ventilated.
Try to achieve an overall r 38 to r 49 rating with additional insulation.
The higher the r value the greater the insulating effectiveness.
Vapor retarders shall not be required in roof ceiling assemblies where the ventilation space above the insulation averages 12 inches or greater.
When determining how much insulation you need don t guesstimate calculate.
Typical recommendations for exterior walls are r 13 to r 23 while r 30 r 38 and r 49 are common for ceilings and attic spaces.
If you look at the chart above you can see that the attic should achieve an r value between r 38 and r 60 depending on the current insulation levels.
Depending on where you live and the part of your home you re insulating walls crawlspace attic etc you ll need a different r value.
In addition to climate r value also depends on the age of your home.
For homes in the seattle washington area we ve already established that the correct insulation r value climate zone is 4.
