About Chaplin Building

Flat roof waterproofing — what actually lasts

21 January 2026

Most flat-roof failures we're called to aren't material failures — they're detail failures at upstands, outlets and penetrations. Whatever system you choose, the detailing matters more than the headline product spec.

Liquid-applied PMMA and polyurethane systems give excellent results on complex geometries; single-ply (TPO/EPDM) is fast and cost-effective on simpler roofs; hot-melt is the long-life choice for inverted roofs and podiums. We'll specify based on the roof, not the brochure.

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