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Case Code: PHEMAT-S2024Completed Verified
Basement Sealing
Commercial Plaza Underground Parking Block
Client Developer
Apex Commercial Hub Kenya
Location
Westlands, Nairobi
Completion Year
2024
Status
Tested & Approved
Executive Case Summary
The Westlands Hydrostatic Ingress
Located in Westlands, Nairobi, this three-level commercial underground parking park suffered from intense subterranean water table pressure. Hydrostatic forces drove moisture through retaining wall cracks and floor cold joints, causing active stream leaks, mineral salt efflorescence, and vehicle damage.
The Crystalline & Injection Solution
Our engineers executed high-pressure hydrophobic polyurethane foam injection to immediately choke off active water streaming points. Once dry, we power-chipped the concrete walls and applied a premium negative-side crystalline slurry that penetrates the concrete pores to form an integrated, permanent moisture barrier.
⚠️ Ingress Challenge
Subterranean spring channels below Nairobi Westlands created constant high hydrostatic water pressure, which repeatedly washed away standard cement mortar repairs.
🛠️ Engineered Solution
Our engineering team used high-pressure water-activated polyurethane grout. Upon contacting the leaking water, it instantly foamed to create a elastic seal inside the structural pores, drying out the parking block.
Visual Performance Comparison
BEFOREAFTER
Detailed Technical Scope Executed
- Injecting dynamic expanding polyurethane grout into active leaks under high pressure
- Placing a robust cementitious crystalline barrier onto the concrete retaining walls
- Installing perimeter sub-floor channels to divert minor subterranean seepage
- Anti-salt chemical washes to prevent salt crystallization
Specified Materials & Formulations
🧪 Penetron Crystalline Slurry🧪 Sika Injection-201🧪 Dryzone Anti-Salt Wash
"Our basement car park has been bone dry for over a year now, despite heavy rains. Phemat solved a problem that three other contractors failed to fix."
Eng. Charles Mutua
Chief Facilities Engineer, Apex Plaza
📊 Project Metrics
Area Treated2,500 m²
Application Duration14 Days
Contract ValueKES 3.2M
Warranty Period10-Yr Structural
Do you have a similar waterproofing issue?
Water travels through unpredictable paths in masonry and concrete slabs. Do not waste waterproofing compounds. Contact Peter Mwanzia for a customized structural inspection of your property.