GN12 Ponding on Flat Roofs

This single page guidance note addresses some common queries around why ponding water may be present but also tips on key questions for contractors to ask at tender/quotation stage and how standing water can be avoided.
NFRC GN12 Ponding on Flat Roofs (MRK209).pdf GN08 Underlay Labelling and Suitability.pdf.png

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