So if it is warm outside after installation a seal will be activated acting as an obstacle protecting the roof from any water ice or snow going under the shingles.
How to shingle a roof in the winter.
The tar strip needs to be about 60f to activate.
Make sure that the tab of the shingle in the second course will cover it completely.
To ensure you don t blow through your shingle when nailing shingles nail down through the double layer of shingle being careful to use a straight flush angle.
Set the first shingle of the second row back a half tab 6 inches 17 centimeters from the edge of first shingle on the first row and so that the bottom of its tabs just touches the tops of the cutout slots on the shingle below.
Lay the second row of shingles.
The first challenge to winter roofing with asphalt shingles is the shingles themselves.
Nails and nail guns.
Several crucial perimeters need to be followed before installing a shingle roof in the winter.
The temperature of the shingles and humidity in the air lines can affect how the pneumatic guns drive the nails so the pressure setting for warm weather may.
In the winter a dab of roofing cement or tar should be added to each shingle to bond them together until the tar strip is activated in warmer weather.
Secure the horizontal flange to the roof.
Nail guns have been known to jam more frequently in cold temperatures.
In the winter time a professional roofing contractor may choose to hand seal the shingles with an approved asphalt roofing cement or other adhesive that s provided by the manufacturer.
They will also become more difficult to cut.
Every tab should be sealed with one or two dabs roughly 1 inch in diameter of asphalt roofing cement.
Place the second step flashing piece over the end shingle in the first course by positioning it 143 mm 5 5 8 above the bottom edge of the exposed asphalt shingle.
Asphalt shingles have a seal between them designed to firmly bind and secure the shingles together when exposed to sun and warm temperatures.
Shingles that aren t stuck to one another are very susceptible to damage in winter winds.
Eaves protector membranes and roll roofing.
The shingles will lose some flexibility in the cold.
Nail metal flashing called drip edge along the bottom edge of the roof deck near the gutters.