is xps a vapor barrier?
#1
is xps a vapor barrier?
Is XPS a vapor barrier if a put tuck tape on all the seams and tape up where the xps meets the walls and ceilings?
Everything I'm reading says it is not considered a vapor barrier but a vapor retarder and does actually breathe a bit.
If it is a vapor barrier then why do products like ISOCLAD come with a foil vapor barrier 'built in'?
Everything I'm reading says it is not considered a vapor barrier but a vapor retarder and does actually breathe a bit.
If it is a vapor barrier then why do products like ISOCLAD come with a foil vapor barrier 'built in'?