I’ve just built a SIP panel flat roof extension, it took a weekend to put up, a half day to lay the epdm roof and then I waited for a rare fine day to cut open the EPDM, slotted this Upstand in glued it and screwed it down. The dimensions were perfect, the U value exceeds a timber based one and I am delighted with the end result. Why make life hard work when, with good planning you can build on a budget and when convenient. Highly recommend this company, give em a call.