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Waterproof Bladder Masterclass for Professional Deck Builders
The Dr.Decks Waterproof Bladder Masterclass gives professional deck builders and contractors practical training on an EPDM drainage method we use in custom deck construction. In this course, we cover planning, sourcing, installation, and testing in one clear sequence.

Making decks that push the limits of design and structure.
Build a Better Understanding of Underdeck Drainage
Waterproofing below a deck involves more than choosing a product. The layout has to account for the shape of the deck, the direction of water, the depth created within each joist bay, the connection at the house, and the route into the gutter and downspout.
In the Waterproof Bladder Masterclass, we teach the system as a sequence. You see how the pieces are measured, prepared, installed, joined, and tested instead of receiving a loose collection of tips. That makes it easier to understand how one decision affects the next, especially on curved, angled, cantilevered, or above-grade deck layouts.
We designed this course for builders who already understand deck construction and want to study a specialized drainage method. It is not a substitute for construction experience, job-specific planning, applicable codes, manufacturer instructions, or professional judgment.
