Traffic on the roof should be avoided as ice, snow and frost make the surface hazardous and can also cause shingles to break or crack.
When removing snow, avoid direct contact with the shingles as this will scrape off the protective granules.
When applying shingles in temperature below 0°C (32 °F), handle the product with care as the shingles become more brittle. Never force or drop shingles in cold weather as they may crack or break.
If shingles are installed during the colder months, the tabs of the shingles should be sealed down manually using BP Multi-Purpose Plastic Cement as the sun is not warm enough to activate the adhesive strips.
NOTE: The amount of plastic cement used when sealing down shingles should not exceed two spots under each tab, no larger, or thicker than a quarter.