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Foaming roof rafters or higher SEER A/C

13 years ago

We have been going through our estimates and realized that the cost of foaming the roof rafters (vs. R38 blown in insulation) is roughly the cost of jumping from a 13 SEER to a 15 SEER a/c unit on all of our units.

We live slightly north of Atlanta in Northeast Georgia so we have a fairly mild climate. Gets really hot but rarely drops below freezing.

Any thought about which is better? We would love to eliminate the foam and go with the 13 SEER for cost reasons but if it makes sense to do one or the other we would be willing to spend the extra (almost 8k) to do so.

We plan to live here for 30 plus years so any cost benefit would be long term.

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