Thermal mass and insulation
I have a question regarding thermal mass for a home in a tropical climate (hot and humid year round). The exterior walls will be built using grouted CMU, which is pretty standard in the tropics. For simplicity, I was planning on having exposed masonry on the exterior and finishing it with a cementitious plaster and an exterior grade paint. On the interior, steel stud framing to provide a service cavity and also to fill the bays with R15 mineral wool.
However, I have many doubts and still not sure if I quite understand how thermal mass works. I’ve read that typically you would want to keep the thermal mass inside in a hot climate, in order to keep it from absorbing solar energy, and subsequently heating up your house at night. I guess the question that pops into my head is whether the interior insulation is going to perform well. My guess is it would slow down the transfer of thermal energy from the walls to the interior space as it radiates throughout the night. Is the thermal performance of the assembly affected substantially by whether the insulation is on the exterior or interior?
Any reading material on the matter would be greatly appreciated, thanks in advance.
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