Why temperature matters
Roofing materials react to cold and heat. Timing is one of the steps of a roof replacement to plan from the start.
Asphalt shingles carry an adhesive strip that bonds each course to the one below. The sun's heat activates that strip. In cold weather, the strip is slow to seal and the shingles stay more vulnerable to wind for a while.
On a flat roof, torch-welded membranes handle low temperatures better. Self-adhesive products, glues and sealants, on the other hand, have minimum installation temperatures set by their manufacturer.
In every case, the surface must be dry. Rain, dew, frost and snow complicate the work, whatever the material.
Spring
Spring is the season of discoveries. The thaw reveals the winter's leaks and the calls pile up.
Temperatures are good, but rain is frequent and schedules fill up quickly. If you already know the roof needs replacing, ask for your quotes at the end of winter.
Summer
Summer offers long days and dry surfaces.
Intense heat has its downsides. Shingles soften and get marked underfoot, and crews start earlier in the morning to avoid the full sun.
Fall
Fall is in high demand. Everyone wants a new roof before the snow, and roofers are often fully booked.
Early fall works well. The further into the season, the shorter the days and the colder and damper the mornings.
Winter
Replacing a roof in winter can be done, especially a flat roof. The job takes more preparation. The surface has to be cleared of snow and ice, the work goes in smaller sections, and the days are short.
For a shingle roof, many roofers prefer to wait, except in an emergency. If the work cannot wait, ask us how we will make sure the shingles bond and what the manufacturer specifies for cold-weather installation.
Roofers' lead times
Availability matters as much as the weather. In spring and fall, the wait between signing and the start of work gets longer.
Two moves put you ahead:
- ask for quotes a season before the date you want
- have the planned work period written into the contract
Frequently asked questions
Can a shingle roof be replaced in winter?
Yes, a shingle roof can be replaced in winter, with precautions. Cold makes shingles more brittle and delays the sealing of the adhesive strips. Ask us what measures we take and whether the manufacturer's warranty applies to a cold-weather installation.
My roof needs replacing but it does not leak. Can I wait until spring?
Often, yes. Ask us first to examine the roof and confirm it will make it through the winter.
How far ahead should I plan?
The lead time depends on the season and the roofer. In peak season, expect several weeks between signing and the job.
What is the best time to replace a roof?
The best time to replace a roof runs from late spring to early fall, when the weather is mild and dry. Roofers are busiest then, so ask for your quotes a few months ahead. A roof replacement is still possible in winter, with precautions and depending on the type of roof.