Installation Tips for Pressure-Sensitive Elastoform Products
STORAGE: Heat exposure is what causes Pressure-Sensitive Elastoform Flashing® (PSEF) to cure on the roof after installation, so storing all your PSEF in a cool place will maximize its shelf life. Carlisle performed an experiment where Sure-White® 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 PSEF easy to work with? Use a heat gun to warm the flashing prior to installation in colder weather. Always heat Sure-White PSEF even in the warmer months. Rule of thumb; store cool and install warm!
INSTALLATION: Speaking of forming corners, the PSEF 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 Carlisle 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 PSEF. 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. PSEF needs to have a solid surface beneath it for long-term performance. If an additional layer of PSEF 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 of PSEF is used.
LAP SEALANT: All PSEF requires Lap Sealant to be applied and feathered over the entire splice edge.
Please contact your Regional Manager with questions
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.
Benefits of Using Sure-White EPDM Accessories on TPO Systems
Sure-White Pressure-Sensitive (PS) 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.