Why Your Roof Shingles Bunckle

The pieces of sheathing are supposed to be spaced about 1 8 inch apart so that they have room to expand and contract as the temperature changes.

Why your roof shingles bunckle.

You may have curling or buckling shingles for a number of reasons but the. New shingles not sealing down standard asphalt shingles feature an adhesive strip that softens during warm weather especially when the sun s rays hit the roof directly. When the shingles heat up. Asphalt shingles sometimes buckle slightly and in an irregular pattern due to moisture in a the materials of a new roofing system.

Out of all the causes of buckling shingles the most common and the most damaging reason. The wetness gets absorbed by the felt underlayment causing the felt to wrinkle. Buckling shingles can sometimes be traced back to mistakes made during roof installation even though the buckling may not show up for a year or two after you get a new roof. This sheathing is generally made from plywood or a similar material.

Use of low quality underlayment such as tar paper that was wrinkled during roof installation or shifts and moves around under the shingles. Similar to felt an underlaynment is a vapor barrier. Felt can rise and buckle if it s not stretched and applied to your roof decking plywood properly. Buckling describes a shingle that is raised in the middle.

This is most probably an indication of poor ventilation. Felt paper should be kept completely dry before it is installed onto the roof. Curling and buckling are the most common phrases used to describe the problems with your roof shingles. The felt paper was saturated with water when it was installed.

Moisture in underlayment and roof decking. Why does your roof have buckling shingles. A buckle is formed when moisture is trapped under the shingle. Naturally being that your shingles are installed over the felt it causes the shingles to buckle as well.

Occasionally the buckling is caused by poor workmanship wrong materials or possibly by a problem with the structure itself. Bowing can occur if acclimation is not allowed and this will cause the shingles to buckle. Under your shingles there is a layer called the roof sheathing. This then telegraphs to the shingles above.

The most common cause appears to be movement in the roof sheathing with changes in moisture levels. Ripples or waves on the roof surface are a sure sign that the shingles or decking has probably buckled. Roofs buckle because either the roofing underlayment has wrinkled or the wood deck itself has shifted for some reason.