Insulating Roofs With No Attic

I ve weatherproofed and insulated it as well as i could but there is one room that is giving me real headaches.

Insulating roofs with no attic.

This is because the top floor ceiling is no longer the air barrier for the house the spray foam at the roof deck underside in the attic is the air barrier. Additionally insulation serves as a way to enhance sound proofing on the uppermost envelop of your house. In practical terms you can choose between mineral wool or insulation boards. Covering up the soffit vents with loose fill or batts which can happen if you stuff insulation along the eaves is a huge no no.

Insulating an unfinished attic can be a simple diy project. Suggestions for un vented or hard to vent building roof cavities. How to avoid condensation leaks attic mold insulation mold structural damage to roof framing when roof venting is not possible cathedral roof and knee wall insulation venting air path options in older homes hot roof designs. Insulating a roof with no attic space.

I have restored an historic building and am now running it as a b b. So insulating the floor of the attic is not only the best solution but it is also the simplest and cheapest. According to energy star our local area falls under zone 5 which means the insulation s r. The airflow from the soffits to the ridge vent keeps the roof cool and prevents ice dams and the material will block that flow.

Insulating in and around your roof attic space also prevents long term damage from moisture build up or ice damming which results from the warm air trying to escape through the apex of the roof but instead heating up the snow. They are the easiest to insulate because the insulation is installed between the framing members or joints of the floor according to the university of tennessee extension. If you put cellulose up there it will help insulate but you need a vapor barrier above the ceiling because you ll have warm ceiling air hiiting colder roof surface and condensing which will turn the cellulose into a moldy mess. For the same reason insulation shouldn t touch the roof s underside.

Worries about the hot roof un vented cathedral ceiling designs how to. The r value of the attic insulation. In an unvented attic penetrations through the ceiling directly below the attic do not need to be air sealed. Roof repair and replacement pros recommend looking at the r value of the attic insulation that will be used.

An unfinished attic is an attic that is not considered part of the living space.