Flashing Options for Every Detail
June 11, 2019
Carlisle offers three different types of Sure-Seal® Pressure-Sensitive (PS) flashings to address the variety of details found on any given roof. All three feature the proven weatherability of EPDM and come with 30-mil of Pressure-Sensitive (PS) SecurTape™ 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.

PS Elastoform – often called “uncured” 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 it is necessary to limit heat exposure in the manufacturing process; to keep the product uncured; Carlisle requires all edges to be lap sealed. This prevents 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 Elastoform flashing – which has a 9-month shelf life.

PS Overlayment Strip – often called “semi-cured” flashing – utilizes the same Elastoform 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 in order to add tear resistance for stripping in metal edging or end laps. PS Overlayment Strip is packaged without the diamond pattern film, as it is removed during the semi-curing process. This is an easy way to tell the difference between PS Overlayment Strip and a roll of PS Elastoform. Due to the semi-cured nature of PS Overlayment strip, it can seal step-offs at splice intersections of 60-mil rubber without the need for T-joint covers. PS Overlayment Strip is better suited to strip-in seams than PS Elastoform, as it eliminates the need for lap sealant and T-joints.

PS Cured Cover Strip is made with the same 60-mil non-reinforced membrane as Carlisle’s standard sheeting, and then laminated to 30-mil of SecurTape. 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.

Carlisle SynTec’s Sure-White® Pressure-Sensitive Flashing is available in Elastoform and cured cover strip options, and is approved for use on both EPDM and TPO roofing systems. Sure-White Elastoform 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 white or black Elastoform flashing cool during long term storage will help to maximize the shelf life.

Carlisle SynTec has all your flashing needs covered. For more information about pressure-sensitive flashing, please contact your Regional Technical Manager.

    Ron Goodman
    EPDM Product Manager
    Product Marketing
    [email protected]
February 25, 2020
Dual Tanks Cold Weather Application Tips

Proper material temperatures are imperative to ensure that adhesive products deliver the highest level of performance. When applying adhesive products below the manufacturer’s recommended application temperatures, application speed and performance can be drastically affected. To help address material temperature issues, Carlisle has recently announced the availability of heated blankets and temperature sensing nozzle technology. Flexible FAST reaches its maximum performance when the material temperature at the time of installation is 70°F or rising. When temperatures fall below 70°F, urethane adhesives can experience mixture ratio issues that could create application issues. To help address material temperatures during winter applications, the use of hot boxes and power blankets are recommended to ensure the adhesive remains at 70°F or above at the time of application. For more information regarding heated blankets, click here or visit the website for one of Carlisle equipment partners: PowerBlanket 4C's Spray Equipment Panther East In addition to heated blankets, Carlisle has also made advancements to delivery systems to help applicators identify when an adhesive product is too cold. In January 2020, Carlisle introduced Temperature Warning Tips for Flexible FAST Dual Tanks. These tips make it easy to apply polyurethane adhesives properly. Carlisle’s Temperature Warning Tips provide the applicator with a visual cue to easily identify if the material is too cold during application: Nozzle turns BLUE when adhesive temperature is below the required 70°F. Nozzle will be CLEAR when adhesive is spraying at optimal temperature. Compression seal added to create a tighter fit between the gun and tip. This helps eliminate adhesive leaks. For more information, please contact your manufacturer's representative.

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February 11, 2020
Code-Required Minimum R-Values

Over the past 10 years, there has been a shift in minimum required R-values. The 2015 International Energy Conservation Code (IECC) is the driving force behind this movement. More than 20 states have adopted the 2015 IECC, or a portion of its provisions, as their statewide energy code. See the chart below for minimum R-values per climate zone. Since 2009, the roofing industry has seen an R-10 increase in the majority of the states. The total minimum insulation thickness has increased from 3.5" (R-20) to 5.2" (R-30) in parts of over 40 states. The map below can help you identify climate zones within your state. Climate zones 4 through 8 have experienced an R-10 increase. Additional resources are provided below to help you determine the applicable energy code and its associated minimum R-value requirements in a given state or local jurisdiction.    1. Minimum Insulation R-value Requirements: Non-Residential, Above Roof Deck    2. The Building Codes Assistance Project For more information on R-value requirements, please contact Brandon Reynolds at [email protected]

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January 28, 2020
Polyiso Storage, Handling, and Application Guidelines

It is well known that moisture is detrimental to roof system performance. Wet insulation can lead to several issues including mold, reduced membrane adhesion, and ultimately roof system failure during wind events. Because wet polyiso must be removed and replaced, watertight tie-ins are essential every night. But let's take a step backwards and look at overall polyiso storage before and during installation. An appropriate understanding of storage, handling, and application will result in a properly constructed roof system. Material delivery should be carefully coordinated with the roof installation schedule to minimize outdoor storage. However, short-term outdoor storage can be necessary at times. When storing polyiso outdoors, bundles should not be stored directly on the ground. If possible, they should be stored over a finished surface rather than dirt or grass. Bundles should be covered with a waterproof cover and secured to prevent wind displacement. Exercise care when handling polyiso to prevent breaking or crushing the edges and surfaces. Polyiso should always be installed on dry roof decks and in dry conditions. Apply only as much polyiso as can be covered by completed roofing the same day. Roof surface protection (plywood) should be used in areas where storage and staging are planned to reduce direct, excessive traffic. Tips: Place bundles on pallets or included feet over a finished surface such as gravel, pavement, or concrete. Remove polyiso bundles from trucks with proper equipment. Do not push bundles off the edge of a truck or "roll" a pallet across the roof deck. Follow Carlisle’s requirements regarding product application to ensure adequate performance of the roofing system. For more information, please contact your manufacturer's representative.

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