Edmonds Roofing Contractor

Glossary

B

Base flashing

That portion of the flashing attached to or resting on the deck to direct the flow of water onto the roof covering.

Battens

1″x2″x4′ wood strips nailed to the roof, upon which the field tile hangs.

Bird stop

In addition to preventing birds from nesting in the hollows of the tile, this length of formed metal or foam elevates the first course of tile so that it is positioned at the same angle as subsequent courses.

Blisters

Bubbles that may appear on the surface of asphalt roofing after installation.

Box scuppers

Scuppers used on the outside edge of a roof with no overhang.

Built-in Gutters

A gutter on the roof deck with a higher fascia board creating a trough to collect water.

Built-up roof

An outer covering of a comparatively flat roof, consisting of 3 layers of saturated felt and 3 layers of tar. As laid, each layer is mopped with hot tar or asphalt. The top layer is finished with a mineral or rock covering and a special coating.

Bundle

A package of shingles. There are 3, 4 or 5 bundles per square.

Butt edge

The lower edge of the shingle tabs.