Discover the Duradek Difference In the Details

Since 1974, Duradek has demonstrated an attention to detail in every aspect of bringing a successful product to market. We will discuss how Duradek sets itself apart from the competition and has become the proven leader paving the way in vinyl membrane construction, waterproofing details, and extensive technical support.

Vinyl Membrane Construction

Duradek Membrane Construction

Let us begin with the construction of the Duradek membrane.  Constructed of Polyvinyl Chloride (PVC), Duradek is a 60 mil 100% waterproof vinyl membrane with built in UV protection and mold and mildew inhibitors.  Unlike many competitors, these inhibitors are present throughout both the top (1) and bottom (2) vinyl layers. This aids in extending the life of the membrane and helps to avoid brittleness and discoloration. Duradek’s top layer (1) is a PVC/acrylic finish textured for slip resistance and walkability. The vinyl is laminated to a woven polyester fabric (3) for added strength and durability yet Duradek still maintains its elasticity and can stretch and shrink with the movement of the substrate through the varying seasonal climate changes.

Waterproofing Details

Duradek waterproofing details are time-tested and adhere to accepted industry standards and codes. For an overview of the intricate details that go into the waterproof system, check out installation details here. Each detail is an integral part of the waterproof system.  Lack of the proper training and skill in these details can lead to water intrusion and a breakdown of the entire system. We will discuss three details as a sampling of Duradek’s complete waterproof system — seams, inside corners, and deck to wall intersections.

Heat welding a seam


Seams are the most critical element of the Duradek system.  They must not only maintain their waterproof integrity through normal deck use but also not detract from the overall attractive finish.  This balance is obtained with seams that are ¾” overlapped and heat welded with a hot air heat welder.  You will find many of our competitors require at least 1 inch or wider seams. This brings undue prominence to the seams. Duradek requires two passes of a hot air heat welder.  The first pass fuses the two layers together in a waterproof manner.  A second pass caps the weld to further protect the seam from water intrusion and from furniture legs, heels, and claws snagging the edge.

Folded inside corner

Inside Corners

Inside corners where snow and ice can sometimes collect are made by folding into a dog ear and then fusing the vinyl without the use of relief cuts.  Logic dictates that any time a cut can be avoided only adds to the overall integrity of the waterproof system.

Deck to wall intersection

Deck and Wall Intersection

The deck and wall intersection particularly at the outside edge of the deck presents a special waterproofing challenge especially for rehabs where siding or other exterior cladding may need to be removed.  For proper waterproofing, though, the Duradek needs to be extended 6” in all directions from the face of the deck with a 4” unadhered flap allowing for positive overlap with the building paper.

Technical Support

Duradek has excelled in providing technical support via their extensive website, local representatives, and trained installers. 

Duradek’s user-friendly website provides a plethora of educational and technical material for homeowners, builders, and architects alike who can research the product thoroughly and feel confident they are making the right decision by choosing Duradek. Homeowners have several tools at their disposal like the Dek-Vision tool for making their product selection and the overview of what to expect during the installation process. Builders will benefit from The Best Practice Guide for Builders as well as Techtalks on substrate requirements for a successful install. Architects will find an extensive library of BIM and CAD drawings they can incorporate into their plans. Also, architects will find options for free AEC continuing education courses that they may pursue to stay on top of the latest waterproofing trends and design considerations.

Duradek’s network of regional distributors assume the roles of local representatives for Duradek providing accredited lunch and learns for architects interested in continuing education courses as well as providing homeowners with customer support to address any needs or concerns, but their key role is the training of prospective installers. The one clear distinction between Duradek and its competitors is its commitment to only allowing trained installers to purchase and install their products.  Duradek understands that without the proper training in the proven details of the Duradek system, the system can fail and lead to catastrophic ramifications to the entire building envelope.  That is why Duradek prides itself in giving these committed installers the tools they need for a successful Duradek install.

For further information on what sets Duradek apart or to get names of local installers, please contact us.

2 Replies to “Discover the Duradek Difference In the Details”

  1. Hello there! This post could not be written any better! Reading through this post reminds me of my old room mate! He always kept chatting about this. I will forward this article to him. Pretty sure he will have a good read. Many thanks for sharing!

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