WINTER ROOFING AND POWERBLANKET HOT BOXES
HERE COMES THE SUN
Most roofing materials utilize adhesives that require warm weather (or an artificial heat source) to cure and fasten. This means the best time to replace a roof is during the warmer months. Usually, radiation from the sun would soften the adhesive, allowing it to seal the shingles together properly. Colder than 70 degrees and the glue stays too viscous, leading to weathering and erosion. Installing a roof in the winter, without the proper precautions, will lead it to fail quickly, if not immediately. In warm weather, the sun’s heat will properly bond most roofing materials: asphalt shingle (also known as composition shingle), EPDM (rubber) single-ply membrane, roll roofing, peel and stick roofing, and modified bitumen. It becomes more expensive and more difficult to apply these materials in cold weather.
If winter installation is unavoidable, most asphalt shingle manufacturers require that a specialized adhesive be manually applied to each shingle for temperatures below 40 degrees Fahrenheit (4 degrees Celsius). If shingles are applied below 40 degrees without the specialized adhesive, the manufacturer will void any warranty. This is because a cold climate not only effects the adhesive, but the actual shingles are less flexible and more likely to break if dropped. To help avoid this, try leaving your product in a warm truck bed as long as possible before bringing it up onto the cold roof.
If you plan to do roof repair in winter, you need an artificial heat source to keep your asphalt shingles warm until installation. The best temperature to install a roof is between 70 and 80° Fahrenheit (21 and 27° Celsius). If it’s warmer than 80 degrees, asphalt shingles have the opposite problem of becoming overly pliable. This leads contractors to overdrive nails, and foot traffic to easily erode the roof. Consider leaving your shingles in shaded areas when the weather is too hot.
EPDM (rubber) membrane roofing is even more sensitive to its environment than asphalt shingles. Like a composition roof, EPDM requires high temperatures to soften the adhesive needed for curing. Even at high temperatures EPDM can be difficult to work with because it is so thick. As a result, manufacturers recommend it be higher than 45 degrees Fahrenheit (7 degrees Celsius) to install EPDM. This temperature obviously isn’t very practical unless installers have a warm storage area to keep the adhesive pliable until it is used.
THINK INSIDE THE BOX: POWERBLANKET HOT BOXES
Powerblanket has a solution for your winter roofing needs. The Powerblanket® Hot Box will maintain the desired temperature of your shingles and/or adhesive on site, making the winter install much easier. While winter roofing isn’t ideal, Powerblanket makes it much easier than it has been in the past.
Powerblanket Hot Boxes save you money by keeping your products from freezing without the risk of overheating. Hot boxes are ideal for cold weather storage, freeze protection, transporting, job site heating, remote location use, and winter roofing. Standard Hot Boxes hold product between 100°F and 120°F (38°C and 49°C) and optional adjustable thermostatic controllers allow temperatures to be precisely controlled. The Hot Box pallet warmer can be easily assembled, taken apart, and reassembled. This is useful for contractors that need to easily move the box to different job sites.
Powerblanket Pallet Warmers:
- Preserve temperature sensitive material.
- Assemble quickly and easily.
- Heat materials and palletized products: adhesives, shingles, paint, caulk, resins and epoxies, etc.
- Access doors on two sides..
- Certified to UL and CSA standards.
In depth information about roofing obtained from “Cold Weather Roofing.” ProRoofing.com. 14 November, 2016. www.proroofingwisconsin.com/cold-weather-roofing.html
and “How to Properly Stack Shingles on a Roof.” https://www.iko.com/na/residential/building-professional/how-to-stack-shingles-on-a-roof/