Gatineau Structural Waterproofing with BASF MasterSeal
When a foundation, plaza deck, or underground structure needs to stay dry for decades, MasterSeal is the membrane system that engineers specify. Gatineau Concrete applies the full BASF protocol: substrate prep, primer, membrane at engineered thickness, and protection layer. Free written estimate with firm schedule.
MasterSeal is BASF's answer to structural waterproofing: the membrane that protects load-bearing concrete from water intrusion over the life of the building. Multi-storey foundations that sit below grade, plaza decks with occupied space underneath, tunnels and underground parking, basement walls on institutional projects. These are the applications where a leak is not a repair cost but a structural failure.
We install as a BASF-system installer, meaning we follow the BASF protocol for substrate prep, primer application, membrane installation at the engineered thickness, and protection layer placement. The system warranty depends on that protocol being met; we document every step.
We work with the structural engineer to confirm which MasterSeal variant (sheet membrane, liquid-applied, or hybrid system) matches the substrate, exposure conditions, and construction schedule.
Prepare the concrete surface
Substrate is cleaned, cracks are repaired with BASF-compatible material, and joint areas are isolated per BASF specification for membrane installation.
Apply primer and membrane
BASF primer is rolled or sprayed, then the MasterSeal membrane is applied at the engineered thickness with full coverage at all joints, penetrations, and transitions.
Install protection and document
Protection layer is placed where required (below-grade and traffic areas), the system is photographed and documented for warranty support, and the slab is ready for backfill or service.
Engineering coordination
Why Structural Waterproofing Requires an Engineer
Most MasterSeal projects involve a structural engineer because the waterproofing is protecting a load-bearing assembly. The engineer specifies the product, the thickness, the joint detail, and the protection layer. Our role is to install to that specification and provide documentation that supports the structural review and warranty claim.
System types, structural engineer coordination, warranty and protection.
Below-grade structural waterproofing on commercial or institutional projects, plaza decks over occupied space, and any application where the engineer specifies BASF. We install when MasterSeal is specified rather than recommending it over alternatives.
Most MasterSeal projects do, because they involve structural assemblies. The engineer specifies the product and the install detail; we deliver to that spec with documentation.
For below-grade and traffic-exposed applications, yes. The membrane needs physical protection from backfill or traffic; the protection layer is what keeps the membrane functional through service.
Yes, system warranty applies when installed by a BASF-system installer to BASF spec. We deliver the documentation that supports the warranty submission.
Depends on area and system. Foundation walls can be done in days; large plaza-deck systems with multiple layers stretch over weeks. The schedule is in the quote.
MasterSeal below-grade install on a structural foundation. Documentation supported the engineering review, install passed inspection. The system path was clean from spec through warranty.
Z. G6
Structural Engineer, Gatineau
★★★★★
Plaza deck MasterSeal with multiple protection layers. They knew the BASF protocol cold, joint detail at every transition. Holding through full traffic exposure.
Y. G6
GC, Ottawa
★★★★★
Structural waterproofing with BASF spec on a complex below-grade project. The install matched the spec, documentation supported the audit. Real engineering-grade work.
Q. G6
Engineer, Barrhaven
★★★★★
Below-grade MasterSeal across a foundation, full system warranty in our project file. Dry through three springs of melt. Worth doing right at structural scale.
X. G6
Property Developer, Nepean
From the blog
Concrete Guides & Articles
Practical reading on planning, finishes and caring for concrete in Gatineau.
