I am down to two quotes, one for Kommerling and one for Rehau with a £800 difference, are Kommerling that better?
1 kommerling is 5 chamber reha u is 3
Kommerling only comes in 70mm(he said)
So, is Rehau A rated?
How is the 70 mm profile mesured, is it top to bottom, inside to outside etc...