DIY Home Improvement, Remodeling & Repair Forum

DIY Home Improvement, Remodeling & Repair Forum (
-   Insulation and Radiant Barriers (
-   -   Roof Insulation Advice (

dancestudio 01-15-2011 09:18 PM

Roof Insulation Advice
We have A dance Studio in a old warehouse the roof is not insulated there is no attic just open space from floor to the underside of the roof. Question can I use faced or unfaced bat insulation on the underside of the roof, the room is heated and cooled year round . Thanks

BrianKiernan 02-09-2011 06:51 PM

If you are not going to sheet-rock I would used non paper and then staple 6mil plastic as a vapor barrier over the insulation (1 solid pc.)

The paper on the insulation is a vapor barrier, but the issue is if you don't cover the paper with sheet-rock the paper is a fire hazard. The plastic then become the vapor barrier.

nealtw 02-09-2011 08:08 PM

You will want to leave a space between your insulation and the roof sheeting for air flow and you will need air flow from the sofit to ridge vent in every bay.
In new construction when this is planned for they strap the rafters with 2x4s under the sheeting, witch allows regular venting to work.

BrianKiernan 02-12-2011 06:23 PM

Good point Neal you do need air flow there is a product that you can put between the insulation and plywood around here it is called prop-r vent not sure on the spelling but basically it is a piece of ridged foam board or Styrofoam that creates this gap for air flow.

JohnsonCustomInsulation 03-04-2011 03:55 PM

Is it a steel roof or wood? If you have fiberglass insulation right against any roof you'll cause moisture which causes mold\rot and a new roof If there is no room to ven i suggest 2 pound foam

All times are GMT -6. The time now is 06:09 PM.