hat
Si ou pa, presize ke li dwe. Sa a se wout la sèlman ou ka garanti ke materyèl yo twati enstale sou do kay ou yo se materyèl yo menm teste pa Laboratwa Underwriter a.
eng
If not, specify that it must. This is the only way you can guarantee that the roofing materials installed on your roof are the same materials tested by Underwriter’s Laboratories.