How To Install Ice And Water Shield In A Valley

If two courses of iko s ice and water protector are needed widthwise you should apply the bottom course first.

How to install ice and water shield in a valley.

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 installatio. If the manufacturer requires the use of ice water i w in the valley because of the shingle type pitch of roof harsh climate area etc then i would use it with your valley metal. Around roof features like dormers and chimneys you should place ice and water protector below flashing. Drape and press in place working from the center outward toward the edges.

A shingled valley should last the life of your roof if done properly regardless if you have ice water shield under it or just 30 felt. A single length of waterguard rain ice works best but if that isn t possible successive overlaps should be 6. Grace ice water shield introduced in 1978 is our flagship product with over 2 million successful installations in 25 different countries. Membrane must be applied to reach above the highest expected level of ice dams and at least 24 61 cm up the roof from the vertical projection of the interior surface of the outside wall.

The width of the side lap should be as recommended by the manufacturer. Make sure equal amounts of the membrane lay on both. Firmly hand roll the laps to ensure a complete water tight bond. The big question is do i install the ice and water shield over or under the felt or synthetic underlayment the next question should i install the iws o.

Grace ice wa. You should install ice and water protector before other underlayments including roof felt. As you apply waterguard rain ice complete adhesion to the contour of the valley and up the sides is essential. Of course if the above.

The second course should overlap the first course. The ice and water shield should be installed first before installing the shingles over the valley.