May 18, 2018 · The solutions involve either: (a) adding more framing depth on the interior of the rafters to install R-49 insulation, or (b) adding enough rigid foam on the exterior side of the roof sheathing to bring the assembly up to R-49. Solution (b) requires a second layer of roof sheathing on the exterior side of the rigid foam, as well as new roofing.

Mar 29, 2019 · Yes, you can use cellulose to insulate your attic floor. For more information on this issue, see "How to Insulate an Attic Floor." Concerning the 12-in-12 roof (the lower section of your gambrel roof): You will be creating an insulated sloped roof assembly.

Insulating a Mansard or Gambrel Roof on Existing Construction. If you have an existing house with this style, then dense pack cellulose or pour in place open cell foam are your only options. There is no access into the small sidewall areas and thus must be accessed by drilling holes in the sidewalls (in this case the roof), and using dense pack ...

Mar 13, 2013 · Some of the principles used when insulating homes with kneewalls also apply to homes with gambrel roofs. This article may help you decide where you want to put the thermal barrier: Two Ways to Insulate Attic Kneewalls .

Insulate the attic flat, foam top plates and penetrations. Insulating over the sheathing with a gable end window kinda defeats the purpose of the insulation. Whatever you do make sure you have a continuous pressure and thermal boundary

Jul 4, 2017 · We insulated the walls during construction, which are then panelled with a textured 3/8" plywood (looks like beadboard). The roof is Gambrel, with metal sheathing on the exterior and felt underlayment, OSB sheathing. The interior was primered and painted. The interior members are 2x4. There is a loft that is 12' deep.

Jul 9, 2009 · Looking for advise in proper techniques for insulating the ceiling in a Gambrel roof. The rafters are 2×4’s spaced on 19″ centers. The rafters do not hang over or have any vents. Currently the insulation has big gaps (see in pictures).

While vital for energy efficiency, improperly installed insulation can also hinder proper gambrel roof ventilation. Insulation lined too closely under the roof sheathing blocks fresh air from flowing through soffit vents. Meanwhile, gaps between insulation boards or compressed batts open pathways for conditioned air loss.

Jan 19, 2001 · I will be building a gambrel roof garage with a heated studio on the second floor. I plan to insulate with fiberglass. These are some of my questions. Should I use larger lumber for rafters to fit more insulation? Do I need to use the styrofoam channels (if that's what they're called) for ventilation? If so does it run the entire length of each ...

Mar 21, 2023 · Keep your insulation firmly in place by using this Simpson Strong-Tie Insulation Support. Installs between joists and offers optimum flexibility and strength.