Foam Board On Top Of Spray Foam

Old 12-24-22, 10:28 AM
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Foam Board On Top Of Spray Foam

A few years ago I had spray foam installed under the floor of an addition (raised floor supported by helical piles).
I believe the amount that was sprayed is not sufficient. Is there any reason why I cannot place foam board on top of the spray foam to increase the R value ?
Should I Tuck Tape it at the joints ?
Old 12-25-22, 04:57 AM
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What R value do you have currently? As insulation goes, up, out, and down are the typ paths that require insulation, probably not going to hurt anything but gains may be minimal!

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