Algae
Rooftop fungus that can leave dark stains on roofing.
Angled Fasteners
Roofing nails and staples driven into decks at angles not parallel to the deck.
Apron Flashing
Metal flashing used at chimney fronts.
ARMA
Asphalt Roofing Manufacturers Association. Organization of roofing manufacturers.
Asphalt
A bituminous waterproofing agent used in various types of roofing materials.
Asphalt Concrete Primer
Asphalt based primer used to prepare concrete and metal for asphalt sealant.
Asphalt Plastic Cement
Asphalt based sealant material, meeting ASTM D4586 Type I or II. Used to seal and adhere roofing materials. Also called mastic, blackjack, roof tar, bull.
ASTM
The American Society for Testing and Materials. Organization that sets standards for a wide variety of materials, including roofing.
Back Surfacing
Granular material added to shingle’s back to assist in keeping separate during delivery and storage.
Blistering
Bubbles or pimples in roofing materials. Usually moisture related. In shingles blisters are caused by either moisture under the material or moisture trapped inside the material.
Blow-Offs
When shingles are subjected to high winds, and are forced off a roof deck.
Buckling
When a wrinkle or ripple affects shingles or their underlayments
Closed Cut Valley
A shingle valley installation method where one roof plane’s shingles completely cover the other’s. The top layer is cut to match the valley lines.
Counter Flashing
The metal or siding material that is installed over roof-top base flashing systems. &n