MacLennan were engaged to design waterproofing and take liability on their PI as well as supplying all necessary detailing and specification
MacLennan were also engaged to install all waterproofing so there wasn’t any split liability between design and installation.
MacLennan installed Type C Cavity Drain system with a PAC Upgrade and Gas Membranes to create a Grade 3 Habitable Space in accordance to BS8102:2009 which was also gas proof and complied with all regulations and code of practice. The deck was waterproofed with MacLennan Polyprufe spray applied polyurea system applied to the deck and cementitious coatings to lightwells. The finished project was on time with no hidden extra costs. The waterproofing was guaranteed with the MacLennan insured warranty and GPI insurance.