Tender: Flat Roof Repair and Replacement for Theatr Mwldan – Eight Roofs (525.5m2)

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Theatr Mwldan is seeking a contractor to undertake roofing refurbishment works for eight flat roofs totaling 525.5m2, for repair or full replacement. The scope requires building up a warm, mechanically fixed roof system with bespoke tapered insulation to prevent pooling or standing water, new outlets to all internal gutters, and encapsulation and waterproofing of all parapet walls. Designs must meet current Building Regulations (Part B and Fire and Safety), relevant British Standards and drainage guidance such as BS 6229 with correct falls (recommended 1:40 design fall to achieve a minimum 1:80 post-settlement) to prevent standing water under Approved Document H. Contractors must comply with the Building Safety Act and CDM 2015 requirements including duty holder accountability, the “golden thread” of traceable product data (for example BBA-approved membranes), and provide a robust Construction Phase Plan. As the works replace more than 25% of the surface area, tapered PIR insulation must be installed to achieve a maximum U-value of 0.18 W/m²K under Building Regulations Part L.