Questions/Comments: I have a cold flat roof, tar and gravel with R13
insulation between the rafters, built in 1960. A 4/12 pitched roof has been
added without removing any of the tar and gravel. The ceiling height is
already to low to insulate from inside. I was wondering how to address
this? Will I have to remove the tar and gravel down to the rafters and
remove the old insulation no matter if I go with cold or warm?
Also Is EPDM rubber the best? or should I go with a liquid roofing system?