Aerial view of Roof

Rotten wood is the leading cause of the shingles sinking downward.

The chimney’s failing mortar and caulk were in total damaged.

As the wood increases in moisture content, it can cause movement of the decking. As the new roof is installed, moisture is trapped in the system, and roofing felt used as underlayment can absorb humidity and wrinkle.

Excessive weight on the existing structure can cause roofs to sag. This includes snow, ice, wind, sheathing, and roofing materials. Putting too many layers of shingles on your roof can also result in sagging, and it can hold water on it.