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FIBER VS SPRAY FOAM INSULATION  

 

 

Fiberglass Cellulose and Insulation Spray Foam Insulation
Spray foams are plastics like polyurethane and includes agricultural products, like Polyols refined from castor beans, Water, Corn & Sugar. Cellulose insulation is recycled paper, mostly from newsprint. Fiberglass is tiny strands of glass.
Foam Spray Insulation insulating power comes primarily from the material. Insulating power of open cell spray foam comes primarily from thousands of tiny trapped air pockets. Insulating power comes primarily from air spaces between the fibers of the material.
Spray foam insulation does not shrink or change shape once it has expanded and set. Insulating power is reduced when the insulation’s air spaces are compressed. Insulating power declines over time as the material settles under its own weight.
Spray foam insulation expands when applied, filling and sealing even the tiniest cracks and openings. This virtually eliminates air movement through exterior walls. Wind and air pressure force outside air through wall and ceiling cracks and openings, allowing heat, sound, moisture, dirt and allergens to be transported by outside air, through the insulation’s porous air spaces and into interior living areas.
Performance typically exceeds published R-Values because laboratory tests of insulating power do not consider heat transfer due to air movement, which spray foam blocks. Performance is typically less than published R-Values because laboratory tests of insulating power do not consider heat transfer due to air movement, settling and imperfect installation fit.
Solid barrier means no pathways through insulation for dirt or moisture to accumulate. No conditions for mold, mildew and bacteria to grow. Dirt and moisture carried into insulation’s air pockets with outside air create breeding conditions for mold, mildew and bacteria. Outdoor and indoor air pressure differences can eventually force harmful organisms into interior living spaces.
Spray foam insulation expands to fill any space, regardless of dimensions, shape or surface irregularity. Fiberglass batts do not fit perfectly into spaces between wall studs and ceiling joists. A two percent gap can reduce effective R-Value by as much as 23 percent.
Attic air space is insulated because insulation can bond to the underside of the roof sheathing. Attic air space stays as much as 40 percent cooler during the summer. Attic air space is not insulated because the insulation can only be placed between ceiling joists on the “floor” of the attic. Attic air temperatures can reach 150 degrees or more during the summer.

 

 

 

 

 

 


     
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