Peter writes to show his appreciation for the hard working Iso-Spray Installation Team. Peter has a lovely period property and did extensive research on roof solutions and spray foam companies before entrusting Iso-spray with his job. Peter particularly wanted to retain the character of his slate roof but needed a solution for nail fatigue (fixing nails corroded through) that was causing many of the slates to head south and ugly repairs with lead tingles was becoming a yearly exercise. Spray foam will not only insulate a roof but also firmly grip and bond the slates to stop them sliding out of position. Roof timbers are protected by providing a foam that has a slightly open cell structure permitting the timbers to breathe.