Does anyone know the building codes for over-rafter insulation? All I can find is stuff from the UK, which is not too helpful.
We have a 1900s brick construction home in Denver that gets a lot of sun, and the upstairs converted attic gets really hot during the day. We are getting to the point of needing to do a tear-off for this roof and there is already fiberglass insulation between the rafters so we would like to find a way to lower heat gain during the summer and heat loss during the winter. We do not have any ventilation for the roof currently.
I've read a little bit about over-rafter insulation, or warm roofs, but everything says shake or slate on top.
Ok, now the question:
Can I do this legally in the US? in Colorado? Can I put composite shingles over it? Does anyone have any experience with this type of insulation? Thanks.