Allow sheathing to adjust to humidity and moisture conditions before shingle installation.
Roof underlayment moisture barrier installation instructions.
Starting at the eaves apply a 39 3.
Roofing underlayments installation guidelines.
Follow all building codes applicable to your geographical region and structure type as it is considered a vapor barrier.
Lay lines are provided on the product.
It is recommended to follow all building codes applicable to your geographical region and structure type.
Vertical joints should lap a minimum of 4 inches and be offset by at least 6 feet in successive rows see figure 2 2 at left.
Professional grade synthetic roofing underlayment udl30 installation instructions titanium udl30 is an air water and vapor barrier 06 perms and therefore should be installed above a properly ventilated space s.
Rhinoroof u20 installation instructions rhinoroof u20 is a water and vapor barrier and therefore must be installed above a properly ventilated space s.
Put fasteners at least every 8 inches.
Slopes 2 12 up to 4 12.
Here are some more generic tips for applying underlayment.
B along the eaves and in the valleys install the leak barrier before installing deck armor roof deck protection.
Tailor the underlayment installation to the roof asphalt felt underlayment has specific installation instructions outlined in the code book.
Ensure that the space beneath the roof sheathing is properly ventilated before installing to avoid condensation problems.
Underlayment for protection against excessive moisture prior to roofing.
Overlay a second.
Use a construction stapler or a hammer.
C along the rake install deck armor roof deck protection leaving 6 8 152 mm 203 mm minimum of the deck exposed and then install.
For synthetic underlayments it s best to follow the installation instructions provided by the product s manufacturer.
Tyvek protec is a vapor barrier.
On roofs with a slope of 4 12 or greater use a single layer of 15 lb.
If any edge swelling occurs prior to roof underlayment installation all raised joints should be sanded flat.
According to manufacturer s instructions and tyvek.
Some suppliers recommend staples about every 4 inches.
Remove wrinkles and flatten surface of shingle underlayment before.
Asphalt saturated felt starting at the eaves and lapping upper courses over lower by a minimum of 2 inches.
8 1m wide sheet of underlayment overlapping successive sheets 20 3 4 527mm.
Always follow safe roofing practices and osha safety requirements.
Rhinoroof u20 underlayment ihelps seal your home against water damage and other moisture infiltration which can cause mold growth and rotting deck boards.
Install two layers of roofpro underlayment apply a 20 3 4 527mm strip of underlayment parallel with and starting at the eaves.
