Waterproofing systems
Vinyl deck waterproofing
The core system: a single-ply 60 mil PVC sheet that is the waterproofing and the finished floor at once.
Deck construction
Multi-level deck building
A multi-level deck is not just a bigger deck. Each change in elevation adds a stair stringer, a landing, a post penetration and a wall junction — and each of those is a detail that either sheds water or collects it.
Detailing Full envelope integration
Why it works
What this actually involves
In short
- Waterproofing carried through every elevation change and landing
- Post penetrations and stair terminations detailed, not just sealed
- Scales from single-family homes to multi-residential buildings
- Traditional and contemporary patterns across all levels
- Handles freeze-thaw movement without cracking at the joints
Our installers are trained specifically on the detailing, not just the field membrane. Rolling a sheet across an open deck is the easy part. What determines whether the assembly lasts is how the membrane is terminated at stairs, wrapped at posts, and lapped into the envelope at every elevation.
We treat those transitions as the actual work. The flat areas take an afternoon; the details take the rest of the job, and they are the ones keeping water out of the structure.
Assembly detail
You are not buying a deck surface.
You are buying the ceiling below it.
Duradek is one sheet doing two jobs. It is the waterproofing and it is the floor you walk on, which means there is no seam between the two for water to find.
Where it matters most is the point the drawing shows on the left: the membrane turns up the wall and sits behind the cladding, so the drainage plane runs unbroken from the deck into the building envelope. That detail is invisible when we are finished. It is also the reason the deck is still dry long after a caulked joint would have let go.
- Membrane60 mil single-ply PVC sheet
- ChemicalTested to ICC-ES AC39
- WarrantySpeak to a specialist
- Membrane turns up behind the cladding
- Hot-air welded seam
- 60 mil PVC membrane
- Sloped to drain
Also available
Deck construction
Rooftop deck building
Turn a flat roof into a private terrace with one membrane that is both the roof and the walking surface.
Sundeck waterproofing
Sundeck waterproofing
The cheapest usable square footage you can add to a house — and it roofs whatever is underneath.
Waterproofing systems
Waterfront decks
Built for the wind-driven rain, salt and constant damp of a West Coast waterfront lot.
Want a number for this?
We measure on site, check what is underneath, and give you an itemised quote with a timeline. No charge and no obligation.