Installing Ice And Water Barrier On Roof

Install the ice barrier membrane according to the manufacturer s instructions with the drip edge installed on top of the membrane.

Installing ice and water barrier on roof.

Most roofers install one 3 ft wide roll of ice barrier along the eave edge to prevent leaks due to ice dams. The contractor had used the was the regular kind and it was literally melting in some of the areas where it was touching the metal diamonds that were directly exposed to the sun for extended periods in the day. The eaves flashing shall be installed from the end of the deck to a minimum of 24 inches up the slope. On most roofs this isn t far enough to comply with the international residential code.

Eaves flashing is required to prevent ice formation at the eaves and gutter to back up beneath the roof covering. 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. Ice and water protector needs to be installed directly onto the roof deck after you have placed the drip edge at the eave. 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.

Remember that in high. Ice water shield acts as a vapor suppressor so it not only keeps the water out but also keeps the moisture in. 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. The problem turned out to be you ve likely guessed it the ice and water installed by his roof contractor.