Gravity allows the water to flow over the tar paper down to the edge of the roof.
Ice dam roofing paper.
If you are not using the elastomeric membrane i would put roofing paper over the entire roof.
Click to add item 15 asphalt felt 3 x 144 roofing underlayment 432 sq.
What does felt paper do.
The guy also talks about how the ice water shield seals itself around roofing nails which helps to distinguish it from a traditional underlayment product e g.
Ice dams are formed by the continuous melting and freezing of snow due to heat escaping from the house or from a backup of frozen slush from the rain gutters.
Click to add item leakbarrier ps200 high temperature 36 x 66 8 ice water barrier 200 sq.
Gcp invented fully adhered roofing underlayments more than 35 years ago.
Tar paper roofing felt thermoplastic polyolefin etc or cheaper.
Fourth you need to put a drip edge on the remaining sloped sides of the roof over the building paper and over the ice and water shield.
Ice and water shield is a far superior product compared to basic roofing felt paper.
Paper mat 5 polymer modified asphalt 2.
Now ice and water shield is designed to stop ice damming or water that backs up say from your gutters and getting into the roof surface.
Many shingle guarantees require roofing felt because it makes the shingles last longer.
Item 169827 model 5003002.
It must be installed the full length of all valleys.
Ice dams are a serious issue for homeowners and roofing professionals in cold climates or even where occasional snow may fall.
Grace ice and water shield fully adhered smooth surface roofing underlayment provides best in class roof leak protection against wind driven rain and ice dams.
Grace ice water shield 36 in x 75 ft 200 sq ft rubber roof underlayment.
Ft to the compare list.
The melted water flows under the snow and freezes as it reaches the unheated soffit area at the eaves thus creating an ice dam.
It does this by using gravity.
Traditional felt paper does a decent job at stopping most leaks where water gets under shingles tiles metal or slate.
Do you need to put it on the entire roof or and also do you need felt as well in addition to the ice and water shield.
Both products have a separate purpose.
Weatherwatch protects against ice dams is required at eaves by many building codes wherever the january average temperature is 25 f or lower or where there is a possibility of ice forming in the eaves check local building codes for specifications in your area.
In the video it s been installed on the entire roof.
This barrier shall consist of at least two layers of underlayment cemented together or be a self adhering polymer modified bitumen sheet many times referred to as ice dam protection or ice and water shield.
