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Insulation question: Commercial building with a metal roof.
Posted on 6/17/16 at 1:31 pm
Posted on 6/17/16 at 1:31 pm
Is there a way to improve the insulation after the fact?
Backstory:
4400' single story brick and stucco. Has a metal roof screwed into wooden purlins. Between the drop ceiling and the purlins is about 3-4' of space. On top of the ceiling tiles is a layer of about 6" of insulation(fiberglass).
Should I consider spray foam to the underside of the metal roof or just add more rolled insulation?
Definitely meeting w/ a insulation company, but there's a wealth of knowledge and experience here so I'd like to hear your thoughts.
Looking to improve summertime AC performance and I feel we are getting a lot of heat from the roof.
Backstory:
4400' single story brick and stucco. Has a metal roof screwed into wooden purlins. Between the drop ceiling and the purlins is about 3-4' of space. On top of the ceiling tiles is a layer of about 6" of insulation(fiberglass).
Should I consider spray foam to the underside of the metal roof or just add more rolled insulation?
Definitely meeting w/ a insulation company, but there's a wealth of knowledge and experience here so I'd like to hear your thoughts.
Looking to improve summertime AC performance and I feel we are getting a lot of heat from the roof.
5
Posted on 6/17/16 at 1:32 pm to VetteGuy
Seems like spray foam would work.
Posted on 6/17/16 at 1:34 pm to AUCE05
quote:
Seems like spray foam would work.
Just have to be careful using that due to leak detection from the metal roof. Open cell, I guess, would be better than closed.
Posted on 6/17/16 at 1:45 pm to VetteGuy
Flat roof?
Posted on 6/17/16 at 4:25 pm to Sao
Pretty much, slight pitch
Posted on 6/17/16 at 4:29 pm to VetteGuy
I feel reasonably certain the OB would recommend a combination of Flex Seal and Flex Foam.
Posted on 6/17/16 at 4:32 pm to VetteGuy
there are methods to attached blanket insulation between the purlins that are cheaper especially if you won't be able to see it. You can use chicken wire or metal strapping to hold it in place
spray foam is great but there are fire code issues with it that should be addressed
spray foam is great but there are fire code issues with it that should be addressed
Posted on 6/17/16 at 4:36 pm to VetteGuy
I've done many metal roofs with spray foam applied directly to the sheeting. It makes a huge difference.
Posted on 6/17/16 at 4:47 pm to BoostAddict
OK, so you would apply it to the underside of the metal? spray purlins and everything, I assume?
Posted on 6/17/16 at 4:52 pm to cgrand
quote:
spray foam is great but there are fire code issues with it that should be addressed
Will review this for sure.
Posted on 6/17/16 at 5:02 pm to VetteGuy
yes you spray everything including the purlins
it will also help to stiffen your roof assembly
it will also help to stiffen your roof assembly
Posted on 6/17/16 at 5:07 pm to VetteGuy
quote:
OK, so you would apply it to the underside of the metal? spray purlins and everything, I assume?
Yes.
Posted on 6/17/16 at 5:08 pm to cgrand
What about leak detection? Also, heat flex?
I hear that rascal pop every now and then.
I hear that rascal pop every now and then.
Posted on 6/17/16 at 5:09 pm to BoostAddict
Clean.
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