Structural Waterproofing Membranes for Laval Projects
When a foundation or plaza deck must stay dry through decades of freeze-thaw and hydrostatic pressure, MasterSeal is the engineered membrane system. Laval Concrete applies BASF MasterSeal with full protocol compliance, from substrate prep through protection layer, backed by system warranty.
MasterSeal is BASF's answer to structural waterproofing: multi-storey foundations that must remain dry, plaza decks carrying foot traffic over occupied space, underground structures, tunnels, and any assembly where water intrusion is a structural failure, not a maintenance issue. The membrane is specified by the structural engineer because the waterproofing is part of the load-bearing design.
We install as a BASF-system installer, meaning we follow the full protocol: substrate cleaning and repair, primer application, membrane installation at engineered thickness, joint detail at every transition, and protection layer where required. The system warranty is backed by our compliance with BASF spec and our documentation.
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 sequence.
Prepare the concrete surface
Substrate is cleaned to BASF standard, existing cracks are repaired with compatible material, and joint areas are isolated and prepped for membrane installation.
Apply primer and membrane
BASF primer is rolled or sprayed, then the MasterSeal membrane is installed at the engineered thickness with full coverage at joints, penetrations, and transitions per the engineer's detail.
Install protection and document
Protection layer is applied where required (below-grade or traffic-exposed), the system is photographed and documented for warranty support, and the waterproofing is ready for backfill or service.
Engineering coordination
Why Structural Waterproofing Demands Precision
Most MasterSeal projects involve a structural engineer because the waterproofing protects load-bearing assemblies. The engineer's specification drives the product selection, membrane thickness, joint detail, and protection strategy. Our role is to deliver that spec with documentation that supports structural review and warranty claims.
Coordinate with other BASF concrete systems on the same project, especially MasterFlow if equipment pads or structural grouting are part of the scope. The slab waterproofing and the grout system work together to protect the structural assembly.
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, Laval
★★★★★
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, Montreal
★★★★★
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, Terrebonne
★★★★★
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, Longueuil
From the blog
Concrete Guides & Articles
Practical reading on planning, finishes and caring for concrete in Laval.
