Flat roof waterproofing: wrong product, wrong sequence, first rains
They used the same membrane spec as Nairobi — on a coastal deck with ponding and 90% humidity. The blisters showed before handover.
Coastal conditions change the product decision
Humidity, salt aerosol, and thermal movement punish generic specs. System build-up — primer, membrane, protection — must match the deck and exposure, not a catalogue cut from inland projects.
Installation technique that actually holds water out
Substrate moisture and primer cure before torch; lap width and roller pressure; upturn height at parapets; outlets formed before field sheets — not patched after.
Flood test or electronic detection before cover — defects found under tiles are disputes nobody wins.
Protection and other trades on the deck
Uncured membrane walked on by tilers or MEP — punctures blamed on waterproofing. Agree protection board, access routes, and handover between trades.
When pricing still matters
Price outlets, upturns, and testing as lines — but select system and sequence first.
For suppliers & trades
Glazing, electrical & plumbing packages — coast
Aluminium, electrical, and plumbing specialists: coastal towers need riser-ready packages with per-point or per-floor rates.
Register once to get matched RFQs. Young teams and established contractors are both welcome.
Handover checklist
Flood test passed; warranty and as-built details issued; protection in place until cover trades finish.
For suppliers & trades
Glazing, electrical & plumbing packages — coast
Aluminium, electrical, and plumbing specialists: coastal towers need riser-ready packages with per-point or per-floor rates.
Register once to get matched RFQs. Young teams and established contractors are both welcome.
Frequently asked questions
Can young teams register for coastal RFQs?
Yes — register at /network/register with honest rates, method statements, and references. Screening focuses on clarity and fit.
Do I need an account to browse opportunities?
Browse at /network/opportunities publicly. Sign in to apply and access scope briefs.
What should developers read next?
Construction cost risks; bill of quantities guide; and related trade insights linked from this article.