Do I need to reconsider open-cell foam vs. fiberglass insulation?
I have a 16 X 28 work shop with a metal roof installed over felt and OSB Sheating with silver radiant barrier on the underside. The outside walls are covered by 7/16 OSB and Hardi Board planks.
I live in South Texas where it gets extremely hot and while building, I added soffits and a ridge vent with gable vents to help the air flow but it still gets fairly hot inside. I will install an 8 ft interior ceiling made of sheet rock and for the walls, I will use 7/16 OSB.
I have been told that open foam insulation is best for what I should use and the installer said he has to close off all the venting to make the building and insulation work right. After reading an article about needing fresh air I became concerned. Much of the time I can keep windows open and when needed, I have a small window air conditioner (12,000 BTUs) but I don't leave it running all the time. Sometimes I am gone for 5-6 weeks during the hot summer and the building stays closed.
Will this cause problems? Am I making the right choice to go with the blown in open foam insulation vrs fiberglass batting? Am I creating a hazard by not having an air system? Lastly, will the metal roof cause condensation/heat thermal problems?
Posted Tue, 04/08/2014 - 21:30
Edited Wed, 04/09/2014 - 05:32
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