Articles covering various roof problems by Jack Gray, a roofing expert with over 25 years in the roofing industry.
Introduction When two different metals come into contact in the presence of moisture, they can form a simple electrochemical cell, creating a situation where one metal begins to corrode more rapidly than it would on its own. This process is called galvanic corrosion, and it can lead to unexpected material failures if the designer or installer …
Introduction Metal roofing is an attractive roofing option. It looks great. It can be recycled. It’s lightweight. Metal panels can each provide the same coverage as dozens of shingles and they can weigh as little as 70 pounds per square (100 square feet). Compare this to a clay tile roof that can weigh more than 1,000 …
Introduction Roof blisters are a common but often misunderstood issue in various roof systems, including built-up, modified bitumen, and asphalt shingle roofs. These raised pockets form due to trapped air, moisture, or volatile gases within the roofing materials. While some blisters remain stable and do not immediately compromise the integrity of the roof, others can …
What are Roof Nail Pops? Roof nail pops, also called “backed-out nails,” are a type of roof defect where the roofing nails which secure the shingles have been forced back and out of the roof sheathing …
Tilt-Up Construction Overview Tilt-up construction is a building method where large reinforced structural concrete panels are cast on site, then tilted up vertically and secured to form the building’s walls. Although the first documented use of …