https://www.reeca.com.au/reeca-blog daily 0.75 2026-03-16 https://www.reeca.com.au/reeca-blog/waterproofing-an-external-pavement-sure-why-not monthly 0.5 2026-03-16 https://images.squarespace-cdn.com/content/v1/66b865ec2cb6fa7aae1d8b7e/037ba978-8f31-4655-939f-9cd5f36d1b76/ChatGPT+Image+Mar+13%2C+2026%2C+08_28_26+PM.png reeca Blog - Waterproofing an External Pavement? Sure, Why Not. Anyone involved in building design will recognise the moment. A project stalls — not because the engineering is difficult — but because the interpretation of a clause becomes the problem. Recently we encountered exactly that situation with NCC Clause F1D5 – External Waterproofing Membranes. At face value, the clause appears straightforward: A roof, balcony, podium or similar horizontal surface part of a building must be provided with a waterproofing membrane… Most practitioners read this as referring to elements of the building envelope — roofs, balconies and podium slabs. 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