Insulation between joists


Old 11-04-08, 01:11 PM
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Join Date: Nov 2008
Location: Midwest
Posts: 4
Insulation between joists

I have never installed insulation before. We are gutting a first floor bedroom in our 110 year old house. I wanted to put insulation between the joists in the ceiling for a sound barrier. The problem is the joists are set at different centers. I think the builder was drunk that day. They range from 12.5 to 19.5" centers and all measurements in between. I can't figure out why. Is there a simple to use product that would work in this situation? I really don't want to cut the batts to width. Is spray in expanding insulation realistic for this small of a job? Is this type of insulation usually expensive?

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Old 11-04-08, 05:00 PM
Join Date: Oct 2008
Posts: 82
No, spray in will be very expensive and not do very much.Isolation is what stops sound. Get some rocksol, cut to fit. then strap the cieling with brazilion channel (steel) on 16" center.

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