Upgrading R38 insulation not worth it? - GreenBuildingTalk ...
Jan 15, 2010 · The problem with all this is that if the insulation under consideration is loose or batted fiberglass, it isn't delivering anywhere near R thirty whatever or R forty whatever, mostly …
R-38...how thin can you get - Love Plumbing & Remodel
Oct 31, 2009 · It was also stamped (on another page) "min 1" of air space; extend baffle 6" above batt insulation; 12" above blown WSEC 502.1.4.5." Considering I have 2x6 rafters and need 1" …
R38 vs. R44 - GreenBuildingTalk - GreenBuildingTalk - Green …
Jul 14, 2017 · I'm building a 4300 sq. ft. home in South Texas and my builder wants $900 to change the ceilings from R38 to R44 and $800 to change the walls from R13 to R15.
R38 vs R60 attic fiberglass diminishing returns?
Jan 11, 2017 · Plan is to have existing insulation removed, then we would personally vacuum and clean attic and air seal all ceiling penetrations, voids, etc. Motivation is both efficiency and …
Blown Cellulose vs. Blown Fiberglass? - GreenBuildingTalk ...
Jan 19, 2017 · I first want to air seal the ceiling deck...around cans, and other cracks that might exist...before having him blow in the R38 insulation. I plan on using a latex roof elastomeric …
2x4 roof truss insulation - Love Plumbing & Remodel
Sep 27, 2019 · To get to code minimum compliance on a U-factor basis (=U0.026 max, = R38.5 "whole assembly") takes only about R35 if all the insulation is continuous, not thermally …
insulation between TJI joists - GreenBuildingTalk
Nov 18, 2010 · Then install the 2nd layer of foam. After that I simply net off the bottom of them and dense pack the rest with cellulose, so 7.5" at r-3.7 would give me r27-30. This gives me a …
Cellulose insulation and cielings - GreenBuildingTalk ...
May 2, 2012 · The dead-weight loading of R75 (~24", initial depth) is on the order of ~3lbs per square foot. For R38 it's about half that. If you want to go truly high-R it's generally better to …
Insulating water lines in attic? - Love Plumbing & Remodel
Nov 2, 2010 · Pipe penetrations in lumber are protected now by nail plates. If the insulation had been placed above the piping, you wouldn't have this problem. However, since the insulation …
Practical attic insulation value? - GreenBuildingTalk ...
Dec 13, 2012 · However, it is pretty cheap to add extra attic insulation. Since you've already spent money on ICF construction with R25 walls, you could consider going as high as R49 to reduce …