Roof Deck Leak Solution – Duradek Case History #165

Two-phase moisture management including a trough ceiling system couldn’t keep the water from leaking through the roof deck to the living space below.

See how Duradek dealers Lakeview Deck & Rail solved the leaking problem AND provided the attractive deck surface in one single product solution.


Residential Roof Deck Leak Solution – Simcoe, Ontario


This wood deck was situated over living space and had two methods of moisture management in place, yet it was still leaking in all of the critical detail areas.

This roof deck had leak issues despite a 2-phase waterproofing system.

The first level of protection was waterproofing through a traditional felt and tar on the roof under the deck boards. The secondary water management approach was utilizing a ceiling system that caught water and re-routed it to a trough. While his was intended as a ‘back-up’ system, it was clear that neither approach was working to protect the living area below from leaks.

2 phase waterproofing with felt and tar on top and trough system below could not provide adequate waterproofing.
2 phase waterproofing with felt and tar on top and trough system below could not provide adequate waterproofing.


Duradek Dealer, Lakeview Deck and Rail knew what needed to be done to resolve the leak issues for good.

To start, they tore off all of the existing deck and failed waterproofing. They established a slope with new framing on one foot centres, and installed all post blockings.

Untreated plywood substrate prepared for Duradek vinyl installation
Substrate preparation requires untreated plywood which is an environmental advantage over chemically treated wood

The new substrate was prepped by sheeting 3/4″ select fir T&G plywood and filling all joints to make it perfectly smooth for the application of the Duradek Ultra Cork Macchiato vinyl. Lastly, the installation of an aluminum picket railing system gave the homeowners a beautiful, low-maintenance new deck.

Duradek Forest Floor Alder
Duradek Forest Floor Alder made and attractive and
reliable, single waterproofing solution.


The homeowners on this project wanted a reliable solution, but at a reasonable price. To do the job right would be a pricy undertaking, so the homeowners carefully considered their options.

After a year of frequent questions to Duradek Dealer, Lakeview Deck and Rail, the homeowners decided to go ahead with Duradek. After the project was completed, these customers provided unexpected bonus tips to the crew which showed how very happy they were with their new, leak-free Duradek deck and the professionalism of its installers.

View or download the .pdf version of Case History #165 for the complete case history with installer details and before and after images.

If you have a decking project in your future and would like to know more about Duradek’s reliable, low maintenance waterproofing solutions, browse through our website or contact a Duradek Installer in your area for a free consultation.

Translate »