When Is It Too Cold to Roof?

WHEN IS IT TOO COLD TO ROOFThermometer in snow

When is it too cold to roof? It really is too cold to roof when temperatures are below 40° F (4 degrees Celsius. Many roofing products have adhesive properties that require the sun’s heat for activation. You risk a faulty roof install if you do not pay attention to the temperature outside. Continue reading for specific cold weather roofing tips.    


The ideal temperature range to install asphalt shingles is between 70 and 80° Fahrenheit (21 and 27° Celsius). Below 70° F and the adhesive will not reach the ideal elasticity and will not create a perfect seal. Temperatures warmer than 80° can be problematic in the other direction. Asphalt shingles can become overly pliable and are susceptible to damage during installation. Contractors are more likely to overdrive nails, and foot traffic can erode the protective granular layer quite easily in extremely warm temperatures.

temperature illustration for ideal roof installation temperatureIf winter installation is unavoidable, most asphalt shingle manufacturers require a specialized adhesive manually applied to each shingle for temperatures below 40° F (4° Celsius). If shingles are applied below 40° without the specialized adhesive, you risk a voided warranty.


EPDM (rubber) membrane roofing materials are even more temperature sensitive than asphalt (composition) shingles. EPDM is joined together using an extensive amount of adhesive. It requires high temperatures to be pliable enough to install and cure. EPDM adhesive is very thick and hard to work with even at high temperatures. So how cold is too cold to install a new roof? Manufacturers recommend the temperature be above 45° F  (7° Celsius) for installation. This recommended temperature is not very practical unless a warm storage area is available to keep the adhesive warm until the moment it is used.


Powerblanket has a solution for your cold weather roofing needs. The Powerblanket® Hot Box will maintain the desired temperature of your shingles and adhesive on site, making a cold climate install much easier. While winter roofing is not 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. The Hot Box pallet warmer can be easily assembled, taken apart, and reassembled. 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.

Powerblanket Pallet Warmers:bulk material warmers

  • Preserve temperature sensitive material.
  • Access doors on two sides.
  • Assemble quickly and easily.
  • Heat materials and palletized products: adhesives, shingles, paint, caulk, resins and epoxies, etc.
  • Certified to UL and CSA standards.

Learn about Hot Boxes


“Cold Weather Roofing”. ProRoofing.com. 14 November, 2016. www.proroofingwisconsin.com/cold-weather-roofing.html.

One thought on “When Is It Too Cold to Roof?

  1. I’m in the middle of a home construction project in the Northwest. The contractor didn’t get the roof on before winter hit. As a result, we have ice/snow on our exposed plywood sheathing, and the windows between new snowfalls has been too short to allow the snow & ice to thaw for removal.

    Do you have a product (like 6×25 thawing blanket) or other that would be suitable for use on an “iced over” roof? That is something safe to use over wood/plywood in an outdoor environment with temps. typically between 20-40 F.


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