A steel-framed flat roof system with only R-25 continuous insulation (c.i.) above the roof deck.[1] An I-joist flat wood roof system with both cavity insulation below the roof deck and continuous ...

Key Takeaways. Roof insulation costs are fairly consistent, with a low end of $1,000 and a high range of $2,500.The average costs for a typical insulation project are around $2,000.; The materials ...

If your attic insulation is good, the snow will stay on for a long while (and actually will add insulation to the roof, since snow is an insulator). The best snowstorm for these observations will ...