Its even worse than it sounds. Turned up to fit 4 houses, and had a mile of mastic everywhere. Went to the site office and got a v/o then spent four hours on each house, cutting it out. Then, after the carpets were fitted, all except one, failed the air test. They took the carpets up, put the mastic back, then they all passed. Got us mugs back to remove gripper, cut the mastic out again, then re-fit. What a ball ache.