June 20, 2019
Quick-Applied Flashing Options for Every Detail
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Versico offers three different types of VersiGard® EPDM Quick-Applied (QA) Flashings to tackle the variety of details found on any given roof. All three feature the proven weatherability of EPDM and come with 30-mil of QA seam tape to create a watertight seal. The primary difference among the three is the amount of cure in the rubber, and the process used to manufacture them.
QA Uncured EPDM Flashing is used to flash irregularly-shaped objects or details with multiple angle changes. The uncured state of the flashing allows the rubber to be formed and stretched into place without reverting to its original shape, like cured rubber. The flashing formulation is designed to cure on the roof with exposure to heat. Since we need to limit heat exposure in the manufacturing process to keep the product uncured, we require all edges to be lap sealed. This is to keep water from getting between the flashing ply and the tape ply while the material cures on the roof. T-joints, corners, and pockets are all made from uncured flashing; which has a 9-month shelf life.
QA Overlayment Strip – often called “semi-cured” flashing – utilizes the same uncured flashing formulation, but is semi-cured with heat during the manufacturing process. The overlayment strip has the dark black look of uncured flashing, but is 70% cured to add tear resistance for stripping in metal edging or end laps. QA Overlayment Strip is packaged without the diamond pattern film as it is removed during the semi-curing process. This gives you an easy way to tell the difference between a roll of QA Uncured Flashing and QA Semi-Cured Flashing. Due to the semi-cured nature of QA Overlayment Strip, it can seal step-offs at splice intersections of 60-mil rubber without the need for T-joint covers. QA Overlayment Strip is better suited to strip-in seams than QA Uncured EPDM Flashing, as you can eliminate the need for lap sealant and T-joints.
QA Cured Cover Strip is made with the same 60-mil non-reinforced membrane as our standard sheeting, and is then laminated to 30-mil of QA seam tape. This product is primarily used for stripping-in metal or end-laps, and offers the same finished appearance as the field membrane. Due to the fully-cured nature and thickness of the product, T-joints are required at splice intersections.
VersiGard White EPDM Peel & Stick Flashing is available in uncured flashing and cured cover strip options; and is approved for use on both EPDM and TPO roofing systems. VersiGard’s White EPDM Peel & Stick Uncured Flashing has a more aggressive cure package to account for the fact that the white flashing will not gain as much heat naturally on the roof. This translates into a shorter shelf life of 6 months. Keeping your white or black uncured flashings cool during long term storage will help you to maximize its shelf life.
Versico has all your flashing needs covered. For more information about pressure-sensitive flashings, please contact your Regional Technical Manager.
EPDM Product Manager