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Community and Q&A

Metal Ceiling and Condensation

mikeysp | Posted in General Questions on

zone 4a.

Hi.

Will I have condensation problems if I install a metal ceiling?

Shop building with pretty good air sealing and insulation.
I will not heat and cool 24/7
Nashville area humidity and temp swings from 30F to 70F in several hours happen.

Details:
vented attic
blow-in fiberglass insulation
metal with sealant at seems

I am prepared to install OSB ceiling if metal will be a problem.

Thank you.

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Replies

  1. Expert Member
    Michael Maines | | #1

    You will have condensation if the panels drop below the dewpoint temperature, which varies with relative humidity. My guess is that with those temperature swings, and knowing that Nashville can be humid, you will probably have condensation occasionally. The material choice doesn't really matter; if you have condensation on metal, you'll have it on OSB as well--you just won't see it because it will absorb into the panel.

    1. mikeysp | | #2

      Thanks Michael. I dont mind any moisture getting drawn into the OSB as it will dry itself out; whereas, dripping ceiling would not be good. So, I will use the OSB.

      Can I run the OSB smooth side facing room, so the paint coating will be on a smoother surface? Was not sure if there was any difference beyond the smooth vs roughness?

  2. ErikOlson | | #3

    You can get the metal panels with a coating applied that temporarily retains the condensation:
    http://www.agwaymetals.com/product/condenstop/

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