Attic Insulation R Value Seattle

I the second r value applies when more than half the insulation is on the interior of the mass wall.

Attic insulation r value seattle.

The power of cleanliness often neglected the attic and crawl spaces play a crucial role in maintaining a safe and energy efficient home. For homes in the seattle washington area we ve already established that the correct insulation r value climate zone is 4. Know exactly how much you need with our project calculators. Does my attic need to be ventilated.

Batts are approximately r 3 to r 3 8 per inch of thickness. 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. Vapor retarders shall not be required in roof ceiling assemblies where the ventilation space above the insulation averages 12 inches or greater. Intermediate framing denotes standard framing 16 inches on center with headers insulated with a minimum of r 10 insulation.

The higher the r value the greater the insulating effectiveness. R value measures how well certain building insulation materials can resist heat. 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. In addition to climate r value also depends on the age of your home.

Try to achieve an overall r 38 to r 49 rating with additional insulation. Seattle crawl space and attic services. The higher the r value the greater the insulation performance. Loose fill cellulose is r 3 13 to 3 7 per inch and loose fill.

The suggested r value for attic insulation is r38 or about 10 14 inches of insulation. 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. Climate zone 2 r 25 minimum rigid board or air impermeable insulation r value. 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.

When determining how much insulation you need don t guesstimate calculate. The easiest way to determine if you need more insulation in your attic is to poke your head in and take a look.