Source: https://tendernation.io/opportunities/01a13d07-9ccf-7308-a6f3-c084a17bf120/spray-waterproofing-c4-kcsl closed GB open procedure # Spray Waterproofing C4-KCSL [Kilnbridge Construction Services Ltd](https://tendernation.io/buyers/kilnbridge-construction-services-ltd) Estimated value £100,000 to £150,000 Published 28 Jan 2025 Deadline Closed 31 Jan 2025 ## Who can bid - Open procedure Anyone can submit a full tender; there is no shortlisting stage. ## About this tender Kilnbridge have secured the HS2 Old Oak Common Station Works Package WP13.1-Urban Realm Civils, Utilities and Earthworks. Part of this scope requires the installation of waterproofing to the roof slabs of the Western HS2 attenuation tank and the GWML attenuation tank. Western HS2 Attenuation tank roof slab to be waterproofed = 1379m2. GWML Attenuation tank roof slab to be waterproofed = 225m2 Works are expected to be completed in 2 to 3 mobilisations commencing in Q4 2025 and Q4 2026. The waterproofing systems shall be a spray applied membrane to BBA certification. The membrane is to be applied to an in-situ concrete substate and achieve a U4 finish compatible with system requirements and BBA Roads and Bridges Certification requirements. Coatings shall be a BBA certified liquid applied structural waterproofing system suitable and certified for below grade applications on horizontal surface. The design life is 120years. All necessary precautions shall be taken to protect membrane from damage during construction operations. All Testing shall be in accordance with BBA certification requirements. ## CPV classification Waterproofing work Source Contracts Finder (UK) [View official notice](https://www.contractsfinder.service.gov.uk/notice/76b97ab6-4dab-4836-a169-8473b660836a) Never miss a tender like this again Get AI summaries, deadline alerts and a bid pipeline for tenders matched to your business. Free to start. [Track tenders free](https://tendernation.io/register) [Buyer profile Kilnbridge Construction Services Ltd: past awards and live tenders](https://tendernation.io/buyers/kilnbridge-construction-services-ltd) [Sector More Construction work tenders](https://tendernation.io/sectors/construction-work) ## More tenders like this [Bannister Sports Centre Athletic Track Soft Market Testing Exercise · Harrow Council · 38 days left · 26 Nov 2026](https://tendernation.io/opportunities/01a1540d-d9e4-71cb-ad57-1603e9042fec/bannister-sports-centre-athletic-track-soft-market-testing-exercise) [Treloweth Community Hall Alterations and Extension Project · Carn Brea Parish Council · 49 days left · 7 Dec 2026](https://tendernation.io/opportunities/01a154e4-4991-71db-baac-ffae413f1c41/treloweth-community-hall-alterations-and-extension-project) [Norwich City Verges Mowing 2026 · Norse Eastern Ltd · 30 days left · 18 Nov 2026](https://tendernation.io/opportunities/01a15476-5fd9-70eb-b920-a66dc3e661e1/norwich-city-verges-mowing-2026) [Gwasanaethau Toeau - Gwaith cyfalaf wedi'i gynllunio ac atgyweiriadau ymatebol / Roofing Services - Planned capital works and responsive repairs · Denbighshire County Council · 28 days left · 16 Nov 2026](https://tendernation.io/opportunities/01a15476-6094-72b9-928b-5c887e7ceea4/gwasanaethau-toeau-gwaith-cyfalaf-wedii-gynllunio-ac-atgyweiriadau-ymatebol) [Repair of St Michaels and All Angels Church Wall · Aylsham Town Council · 31 days left · 19 Nov 2026](https://tendernation.io/opportunities/01a15476-6316-7235-8948-8f108b3da399/repair-of-st-michaels-and-all-angels-church-wall) [Building Minor Works · Derbyshire Support and Facilities Services Limited · 25 days left · 13 Nov 2026](https://tendernation.io/opportunities/01a15408-9087-7003-bd47-df7bc19d7ff7/building-minor-works)