Unless you opt for spray foam then the insulation choices normally come down to cellulose and fibreglass.
Better for attic insulation fiberglass or cellulose.
Cellulose has 38 better air infiltration than fiberglass.
The two main least expensive and most commonly used residential insulation materials is cellulose and fibreglass.
What does matter is the type of fiberglass or cellulose and how well it was installed.
Cellulose forms a dense continuous mat of insulation in your attic.
Rather than trying to meticulously lay fiberglass insulation over the attic homeowners and builders can simply blow cellulose insulation throughout the attic.
When used in an attic space however both types of insulation are ineffective at air flow across the attic floor such as a strong gust of wind.
Both cellulose and fiberglass insulation have their pros and cons but i feel that cellulose is the better bet overall.
R values of fiberglass and cellulose insulation.
Cellulose insulates better than fiberglass especially in very cold weather.
If fiberglass batts become compressed losing some of their air pockets then this insulation may be more affected by air flow than cellulose which performs well regardless of density.
So what are the advantages and disadvantages of each of these.
This keeps the air from moving within the insulation and from penetrations between the air conditioned space and the attic.
Per square inch of insulation cellulose has a higher r value than.
A given sample of cellulose insulation will provide better thermal performance than an identically sized sample of fiberglass insulation.