Jeff Remas Posted January 12, 2009 Report Share Posted January 12, 2009 You are doing phase insepctions on single family home in climate zone 5 currently under construction. During the rough electrical, plumbing and mechanical inspection you notice that the builder had the HVAC company install 1" duct board for the feed and return of the gas forced air heating system. On the 1" thick Knauf if marked R4.3. The installation is in an unfinished basement that is 75% below grade. When you question the builder about the R value and the fact that it will need to be R8, he replies to you that he will not be installing insulation in the floor framing. Instead he will be placing a pvc coated R10 blanket insulation on the basement walls from top to bottom and R19 against the rim board instead of placing R30 in the underfloor framing. Is this an acceptacle, code compliant installation to eliminate having to use 2" R8 duct board? Quote Link to comment Share on other sites More sharing options...
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.