There’re commonly used on new build houses in the UK — new roofs in the UK have a waterproof but breathable membrane under the tiles Also see https://roofit.so

There’re commonly used on new build houses in the UK — new roofs in the UK have a waterproof but breathable membrane under the tiles Also see https://roofit.solar/ https://roofit.solar/ used in a few houses… mainly self build a or architect designed