A Guide to Proper Attic Insulation

This guide to proper attic insulation includes tips on vent areas, gaps, right side up, puckers, loose or compressed insulation, animal nests, mold, mildew and rusty nails.

| September/October 1985

Thinking about putting some (or some more) insulation in your attic? This guide to proper attic insulation can help. 

A Guide to Proper Attic Insulation

Although installing insulation in an unheated attic is usually a fairly straightforward job, a variety of pitfalls await the unwary. So, with cold weather approaching in most parts of the country, we present this Chamber of Horrors of attic insulation mistakes, maladies, and oversights. Look it over, and then pay a critical visit to your own attic—if you dare.

Vent Areas Blocked in the Eaves 

Don't push batt or blanket insulation past the top plate at the end of joist runs . . . or fold it back and up between the rafters . . . or pour fill insulation into such areas. If you do, you'll obstruct the flow of air from soft-it vents (or, in older homes, from gaps between the outer wall and the roof). In fact, if your roof's pitch is steep enough to allow access to the eaves, you can install a slanted-board baffle at the end of each joist run to prevent insulation from clogging the area.

Holes and Gaps in the Attic Floor 

Fill in the extra space around openings where pipes, ducts, and wires enter the attic floor, using unfaced fiberglass or caulk. Caulk nail and drill holes, as well.

10/15/2014 7:41:59 AM

I have always been told and practiced taking a cool shower after handling fiberglass, never a hot one.

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