Waterproofing Systems
NLS Contractors installs waterproofing for basements, podium decks, roofs, wet areas and tanks in Riyadh, Jeddah, Dammam, Khobar and across the Kingdom, using bituminous sheet, polyurethane or cementitious systems. A flood test is recorded before covering, and handover includes system data sheets, test records and any warranty the contract requires.
Waterproofing is a thin layer that decides whether a building leaks for decades, and it is covered up fast, so the work is judged on preparation and testing as much as on the membrane. The package covers basements and foundation walls, podium and plaza decks, roofs, wet areas such as bathrooms and kitchens, and water tanks.
The system is chosen by the specification. Bituminous sheet membranes, torch-applied or self-adhesive, are common on roofs, basements and podium decks. Liquid-applied polyurethane suits roofs and balconies with many upstands and penetrations that sheets handle poorly. Cementitious systems suit wet areas and the inside of concrete tanks. The offer prices the named system and its manufacturer.
Preparation comes first. The substrate must be sound, clean and dry as the product requires, with screed laid to falls on roofs and decks, and sharp edges and honeycombing repaired. Detailing comes next: upstands at walls, drain outlets, pipe penetrations, expansion joints and corners are where nearly every leak starts, so each gets its own detail and its own check before the main sheet or coating goes on.
A protection course goes over the membrane before it is covered with screed, tiles, soil or paving. The flood test holds water on the area for the period the specification states, with the level marked at the start and read at the end. The result is recorded and signed before the next layer is placed, because after that point a leak means breaking up the finish above it.
Warranty terms are set by the contract and the system manufacturer, and the offer states what it will provide, whether a certificate or none, so the position is known at award. Roof membranes in Saudi summers face high surface temperatures and UV where left exposed, so the product must be rated for that. Send the waterproofing specification and details, the basement and roof plans, BOQ areas in square metres, the warranty requirement, the site city and the programme.
Specifications
- ✓Areas: basements, podium decks, roofs, wet areas and tanks
- ✓Systems: bituminous sheet, polyurethane and cementitious
- ✓Details: upstands, drain outlets, penetrations and joints treated before the main membrane
- ✓Protection course placed before screed, tile, soil or paving
- ✓Testing: flood test recorded and signed before covering
- ✓Handover: system data sheets, flood test records, warranty certificate where the contract requires one
Frequently Asked Questions
Which waterproofing system suits a flat roof?+
Bituminous sheet and liquid-applied polyurethane are both common. The roof detail, the number of penetrations and the exposure decide, and the specification names the system the offer must price.
What is a flood test?+
Water is held on the finished membrane for the period the specification states, with the level marked at the start and checked at the end. Any drop is investigated before the area is covered.
Who gives the waterproofing warranty?+
The terms are set by the contract and the system manufacturer. The offer states what it will provide, so the warranty is known at award and not argued at handover.
Does waterproofing include the screed and protection?+
The protection course is part of the system. Screed to falls, or tiles and paving over the membrane, can be included or left to another package, and the BOQ lines show which.
Who supplies Waterproofing Systems in Saudi Arabia?+
NLS Contractors (Northlane Solutions Company) supplies Waterproofing Systems across Saudi Arabia, including Riyadh, Jeddah, Dammam and Jubail. Send your specification and quantities to info@nlscontractors.com or info@northlanesolution.com for a quotation.