Where the building meets the ground, precision is everything.
Plaza decks, paver systems, and foundation transitions demand precise execution from a team that has seen every site condition and knows how to respond.
That team is the Peter Ross Group, as we have spent over 60 years providing at-grade waterproofing services to the most complex commercial and high-rise projects across North America.

What Our At-Grade Waterproofing Actually Covers
Our scope of work at this level focuses on:
- Sidewalks & Paver Systems: We waterproof beneath concrete sidewalks and paver installations, ensuring proper drainage and long-term durability even under constant pedestrian use.
- Plaza Decks & Podium Slabs: Large horizontal surfaces over occupied space require robust, multi-layered membrane systems. We design and install these to protect everything below.
- Envelope Transition Details: The connection between your below-grade waterproofing and your above-grade cladding is one of the most failure-prone areas in any building. We specialize in getting these details right the first time.
- Planters & Landscaped Areas: Green spaces integrated into urban developments require waterproofing and root-barrier systems that perform for decades without compromising the structure below.
The Difference Between Good Enough and Built to Last
There is no shortage of specialists who can apply a membrane, but what separates the Peter Ross Group is the depth of understanding we bring to every project.
That depth comes from our entire family of companies, including Pacific Waterproofing, Universal Polymers, WeatherSeal, Peter Ross Roofing, and Peter Ross CA, each bringing specialized expertise that strengthens every scope we touch.
Across our group of companies, we have worked in the most challenging conditions this region has to offer, including soft soils, high water tables, tight urban sites, and complex multi-system buildings.
Which is why when a project like Vancouver House or the The Erickson Building calls for waterproofing that has to perform flawlessly for decades, we are the team that gets the call.

Built for the Scale You're Working At
The Peter Ross Group is not a small-scale residential operation.
We are a multi-location, North American business with the resources, crew depth, and technical capability to handle large commercial and high-rise projects from start to finish. With offices in Vancouver, Calgary, Seattle, and California, we are positioned to support your project wherever it is being built.
If your project demands precision at every level, from the foundation up, we want to be part of it.
