The most common insulation materials are fiberglass cellulose and foam.
Attic insulation types oregon.
For temperate climates like the pacific northwest you re shooting for an r value of r 38.
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The type of insulation you need depends on which type is currently installed and the required r value.
Closed cell and open cell aka 2 pound and pound respectively.
Just as there are two types of blown insulation fiberglass and cellulose and two types of people those who divide everything into two groups and those who don t there are two types of spray foam open cell and closed cell.
Choose from two types.
For diy attic insulation you ve got two choices.
Spray foam offers the best attic insulation performance available.
Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.
Installing this type of insulation is an.
Loose fill or batt the common term for blanket insulation.
Once you ve decided which type is best for you examine the material options and prices to home in on the right product.
It s available in fiberglass mineral wool plastic fibers and natural fibers.
Blanket batts and rolls are typically constructed with fiberglass although versions made of cotton mineral wool and plastic fibers are also available.
Odoe also serves as a member of the construction industry energy board and the 2017 oregon residential specialty code review committee offering energy efficiency guidance and recommendations.
The department of energy recommends different r values for different climates so you ll need to be sure you re choosing a material that meets the standard for attic insulation in portland oregon.
Each has its pros and cons as well as its own set of adherents who will tell you never to use the other type.
They sport insulation values of approximately r 6 5 and r 3 6 per inch respectively.
Both can be added to uninsulated attics or layered over existing material.
Insulation types include loose fill batts rolls foam board spray board and vapor barriers.
This type of insulation.