Roofing in cold weather can be more difficult than the alternative, but it’s not impossible. It simply requires a little more preparation, diligence and the right products. Let’s explore what Garland products are the best option when roofing in cold temperatures.
MEMBRANE CONSIDERATIONS
MOST RECOMMENDED
StressPly® Plus family | VersiPly® family | StressBase® 80
These membranes are made with more pliable asphalt compounds, modified with SBS rubber, which contributes to increased ease of application in cold temperatures.
Torch-applied roof membranes are acceptable for use in cold weather as long as rolls are not overheated (which can be a tendency in cold temperatures). As with all cold temperature applications, special precautions must be taken to assure the substrate is dry and free of frost, ice or snow.
KEE-Stone thermoplastic membrane will be stiffer in colder temperatures, but it can be used when adhered with hot asphalt. When installed, KEE-Stone’s low-temperature flexibility is -40°F (-40°C). When installed in cooler temperatures, hot asphalt should be used as the adhesive as opposed to KEE-Lock Foam.
ADHESIVE CONSIDERATIONS
ASPHALT
HPR® All-Temp | Garlastic® KM Plus
These Garland asphalt adhesives offer excellent bonding properties as long as proper temperatures are maintained. Insulated pipes and buckets can help maintain proper temperatures, and shorter mop strokes will help avoid temperature loss when installing membranes.
COLD-APPLIED ADHESIVES
This cold-process adhesive, which can be warmed by pumping it through a heat exchanger, contains solvents that help it bite into the membrane it’s being adhered to. Side laps can be heat-welded with hot air, ensuring the system is instantly watertight.
OTHER HELPFUL TIPS
Product Storage
Schedule product deliveries as close to the project start date as possible to avoid prolonged exposure to the elements. Keep products stored at or near room temperature (70°F/21°C).
Heating
Some products may require heating before application to ensure proper viscosity or to help with membrane pliability. Carefully review product guidelines to assure proper heating takes place without risk of damage to the product.
Surface Preparation
It is critical the substrate is dry prior to product application. Keep an eye on the dew point temperature as dew will form on the roof surface during cold mornings.
Substrate Surface Temperature
Make sure the substrate surface temperature is in the proper range for application. Use darker, primed cover boards and smooth, slag surface membranes to aid in the natural warming of the substrate by the sun prior to the application of the cap sheet or surfacing.
Cure Times
Account for longer cure times in cooler temperatures.
Avoid Phase Roofing
Phase roofing should be avoided in cold weather applications. Schedule the installation so there are no partially installed roof sections at the end of each day.
Contact your local Garland representative for more information.
