Keep Your Membrane Splices On Par With Industry Standards
March 14, 2019
One of the biggest challenges in the application of single-ply roofing systems is ensuring that all seams, curbs, and miscellaneous items are flashed-in per industry standards. Installing a water-tight single-ply roofing system is necessary to ensure a successful, long-lasting, and effective roofing experience. Seams are a fundamental part of the system,and their central purpose is to tie-in one sheet of membrane to another. The proper mating of both sheets at this connection point not only creates one uniform system,but also serves as the first line of defense to moisture infiltration.

Many warranty claims can be credited to this aspect of a single-ply system and is a very common reason for roof failure. VersiGard® Pre-Cleaned Non-Reinforced EPDM roofing membrane makes installing seams easier and ensures seam integrity in the long term –resulting in less call-backs,and a better relationship between the contractor and customer.

Here are a few benefits to installing seams on VersiGard Pre-Cleaned Non-Reinforced EPDM membranes:

  1. The membrane is pre-cleaned to remove mica dust, therefore eliminating the need to clean the seam areas with Weathered Membrane Cleaner prior to the application of primer.
  2. Pre-cleaned EPDM allows primer to be applied with a roller.
  3. Versico’s Quick-Applied Tape is available on all VersiGard Pre-Cleaned Non-Reinforced EPDM membranes up to 10-feet wide,which greatly reduces the seam completion time.

The above steps will save on labor in the field, create less jobsite waste,and result in a quality-controlled installation. Please reach out to your local Versico Representative for more information about our VersiGard Pre-Cleaned Non-Reinforced EPDM products.

For more information about EPDM products, please contact Ryan Ferguson.



    Ryan Ferguson
    EPDM Product Specialist
    Product Marketing
    ryan.ferguson@carlisleccm.com
January 9, 2020
Installation Tips for QA Uncured Flashing Products

STORAGE: Heat exposure is what causes Quick-Applied (QA) Uncured Flashing to cure on the roof after installation, so storing all your QA Uncured Flashing in a cool place will maximize its shelf life. Versico performed an experiment where Peel and Stick (P&S) White EPDM Corners were refrigerated for 18 months and they were still uncured and usable. Pretty "cool" for a product with a 6-month shelf life! HEAT: Want to make your QA Uncured Flashing easier to work with? Use a heat gun to warm the flashing prior to installation in colder weather. Always heat P&S White Uncured EPDM Flashing, even in the warmer months. Rule of thumb; store cool and install warm! INSTALLATION: Speaking of forming corners, the QA Uncured Flashing stretches and forms better when the elongated diamond pattern is installed parallel to the deck membrane. Additionally, it helps to use the poly film as a separator when folding the corner in half to prevent the exposed tape edges from sticking to each other. POURABLE SEALER POCKETS: One of the biggest mistakes Versico encounters with Pourable Sealer Pockets is improperly applied or missing primer. It is very important to prime the flashing that is turned down into the pocket, as well as the flashing on the top rim of the pocket. Primer is necessary to achieve a long-term bond between Pourable Sealer and the pocket. If separation is present, it's likely that primer application was missed. It is also important and necessary to thoroughly clean and prime penetrations prior to filling pockets with pourable sealer. OUTSIDE CORNERS: Double-wrapping outside corners is a great idea on ballasted systems, especially if the base membrane isn't cut perfectly tight to the curb. QA Uncured Flashing needs to have a solid surface beneath it for long-term performance. If an additional layer of QA Uncured Flashing is installed to eliminate voids at outside corners, the corner flashing will be better able to withstand movement from expansion/contraction forces and will be less likely to develop a hole than if a single layer is used. LAP SEALANT: All QA Uncured Flashing requires Lap Sealant to be applied and feathered over the entire splice edge. Versico has all your flashing needs covered. For more information, please contact your Regional Technical Manager.     Ron Goodman     EPDM Product Manager     Product Marketing     ron.goodman@carlisleccm.com

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December 5, 2019
Seam Probing

Seam probing is an important final step in the hot air welding process because it is a good indicator to determine if proper fusion has occurred between the membrane layers. Whether the membrane is TPO or PVC, both products need to be probed – but with slightly different techniques. Probing must be done once hot air welds have thoroughly cooled (at least 20 minutes). Premature probing can damage warm seams. Hot air welded seams must be probed throughout the day to check seam quality and to make proper adjustments to hot air welding equipment. The repair of deficiencies must be done routinely throughout the day, but no later than the end of each workday. A blunt or dull cotter pin puller is an acceptable tool to perform the probing task. Versico offers a custom-designed Seam Probe that incorporates an ergonomic, threaded handle with a heat-treated, plated steel tip. With continued use these tools will wear down, creating a tip that is too sharp for probing. Blunting the tip is necessary when this occurs. When a substantial amount of probing is necessary, an extension pole can be threaded into the handle of the Versico probe. This allows the operator to stand up while probing long runs of field seams. Getting started Draw your probing tool tip along the edge of the heat welded seam. Apply firm pressure to probe the seam junction, but not into the bottom membrane sheet. The tool will not penetrate into the lap area of a properly welded seam. If the seam probing tool penetrates into the welded overlap area, use a water-soluble marker to mark the beginning and the end of voids or wrinkles in the seam edge. Repair seam deficiencies as soon as possible using the hand held welder. Versico recommends that repairs be made the same day deficiencies are discovered. Probe repaired seams after they have cooled completely. If the repair is acceptable, wipe off the water-soluble marker lines; if not acceptable, repair the seam using standard heat welded overlay procedures. Another reason all laps must be probed each day soon after they have cooled is to verify the welder set-up is effective. Particular attention must be given to all membrane intersections and heat welded seams at insulation joints. In addition, there should be periodic checks (including at the start of each day) to verify good peel strength. Considerations when probing TPO systems 1.) TPO does not "flow" like PVC. If you observe an area in which you see "flow" of the bottom ply, scorched areas of detail/flashing membrane, or scorched field membrane welds, these areas should be probed. If these areas are overheated to the point of membrane damage, an overlay repair will be required even if the weld probes successfully. 2.) A properly heated field membrane weld will typically have a visual "sheen" approximately 1/2" wide on the bottom sheet at the weld overlap. When walking seams, look for the sheen. If it is not present, probe to ensure weld quality.  3.) TPO seams require a minimum 1.5" weld. Welds less than 1.5" must be overlaid as stated in Versico’s specifications and details, even if probing does not produce deficiencies. Considerations when probing PVC systems 1.) Welds on PVC systems should produce "bleed out". Bleed out refers to the flow of the bottom ply (of the top sheet) outside of the weld. If you do not see bleed out at seam areas, this increases the probability the seam did not receive enough heat when it was welded. Be sure to probe these areas to ensure weld quality. 2.) PVC is a “softer” and more flexible membrane than TPO. As such, a different probe should be used than the one used on TPO roofing systems. The PVC probe should have a blunt/dull tip, or utilize a "hook" screwdriver with a flat head.  3.) PVC seams require a minimum 1.5" weld. If you observe welds which are less than 1.5", these should be overlaid following specifications and details, even if probing does not produce deficiencies. Remember, application of Cut Edge Sealant should not begin until all probing is completed. Please contact Jim Gage with questions.     Jim Gage     Senior Technical Specialist     Product Marketing     james.gage@carlisleccm.com

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November 21, 2019
Benefits of Using White P&S EPDM Accessories on TPO Systems

Versico Roofing Systems allows contractors to use several of its productivity-boosting VersiGard® EPDM Peel & Stick accessories on VersiWeld® TPO roofing systems with up to 20-year Total System Warranties. VersiGard White EPDM Peel & Stick (P&S) accessories can provide substantial labor savings on projects with hard-to-flash penetrations and are ideal when using a generator and hand welder isn't practical. Regardless of which roof system is being installed, experienced roofers understand there is always a good chance of encountering hard-to-flash roof penetrations, or simply a high volume of penetrations. Determining the best way to flash these items in a productive manner while ensuring a long-term watertight seal can be a serious challenge. This is where VersiGard White P&S accessories come into play. Keep in mind your alternative EPDM flashing options for TPO systems: Run into a hard-to-flash penetration? VersiGard White P&S Uncured Flashing is an option to consider. This material is highly malleable and adapts easily to odd shapes and surfaces, making it ideal for flashing pipes, scuppers, and other irregularly shaped penetrations. Overwhelmed by hundreds of roof curbs? Boost productivity by flashing curbs with VersiGard 20" White P&S Cured Flashing in conjunction with VersiGard White P&S 7" x 9" Inside/Outside Corners. This is the fastest way to flash roof curbs and can reduce application time by up to 70% when compared to non-P&S flashing options. White EPDM P&S accessories are also a great option for repairs on TPO roofs when access to power is difficult or it isn't practical to use a generator and hand welder. Transporting generators, power cords, and welders to difficult-to-reach roof sections can be cumbersome and labor-intensive. This additional labor can be avoided by white EPDM P&S accessories, since most of these materials will fit snugly into a backpack! If you're interested in receiving a free trial of VersiGard White EPDM Peel & Stick accessories, please submit a request using this form. Approved Products: VersiGard White EPDM P&S Pipe Seals VersiGard White EPDM P&S Pourable Sealer Pockets VersiGard White EPDM P&S Inside/Outside Corners and T-Joint Covers VersiGard White EPDM P&S T-Joint Covers VersiGard White EPDM P&S Uncured Flashing VersiGard White EPDM P&S 20" Cured Flashing     Ryan Ferguson     EPDM Product Specialist     Product Marketing     ryan.ferguson@carlisleccm.com

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