Installing Ice And Water Barrier On Roof

Section r905 1 2 ice barriers in the 2018 irc says the ice barrier shall extend from the lowest edges of all roof surfaces to a point not less than 24 inches inside the exterior wall line of the building.

Installing ice and water barrier on roof.

This code implies that ice and water shield eaves flashing is required for installation on all heated steep slope structures exception is unheated structures in colder climates. The problem turned out to be you ve likely guessed it the ice and water installed by his roof contractor. On most roofs this isn t far enough to comply with the international residential code. Then install regular roofing underlayment tar paper over the top of the drip edge and over the ice barrier and continuing all the way up the roof.

Cons of installing ice and water shield on your roof the only real negatives of covering your entire roof with ice water shield are 1 cost and 2 potential ventilation problems which are very rare. Ice and water protector needs to be installed directly onto the roof deck after you have placed the drip edge at the eave. Install the ice barrier membrane according to the manufacturer s instructions with the drip edge installed on top of the membrane. The drip edge will be installed over the ice and water protector and other underlayments at roof rake edges you should install ice and water protector before other underlayments including roof felt.

Most roofers install one 3 ft wide roll of ice barrier along the eave edge to prevent leaks due to ice dams. Eaves flashing is required to prevent ice formation at the eaves and gutter to back up beneath the roof covering. The eaves flashing shall be installed from the end of the deck to a minimum of 24 inches up the slope. One person can install long lengths of ice and water shield to the roof however it is easier for two people to install especially with some new installation tricks.