Insulation (cont. p. 4)

Wall Insulation

Blown Fiberglass 

Blown fiberglass insulation, like cellulose, is a type of “loose fill” insulation.  It provides a compacted fill of wall cavities, virtually eliminating possibility of gaps and air pockets.

 

Fiberglass is blown in dry, requiring netting to hold it in place in the wall cavity.

 

Spray Foam Insulation

Spray foam insulation is applied as a liquid.

It quickly solidifies to semi-rigid form, bonding to the wall studs and sheathing.

It is excellent at sealing cracks in gaps and joints.

It will probably be your most expensive wall insulation option.


Of the four types of wall insulation, fiberglass batts are the cheapest option, and I believe the least effective.

That is not to say that batts can’t do a decent job if carefully installed, but the loose-fill types and spray foam will do a better job of stopping air penetration into walls.

There is no one correct answer in choosing insulation.  Compare cost, R-value, and density rating to make a choice that satisfies you and your budget.  

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