A structural framing member that, when viewed cross-sectionally, has the shape of a "C".

(Council of American Building Officials) This organization, as well as the Southern Building Code Congress International (SBCCI) and the International Code Council (ICC) have combined their resources, and now write the internationally recognized One and Two Family Dwelling Code.

A machine used to laminate sheeting or for applying coating with a specified thickness and/or surface attribute.

A specific process used to manufacture some membranes such as PVC.

A popular style valley application where the first row goes through the valley and a shingle is laid up the valley to start next row of shingles.

A slight convex curve of a surface

An overhang of a roofing system, usually over entrances or driveways.

(1) Short for Cant Strip; (2) The act of installing foam at a right angle adjunct.

A triangular-shaped strip of material used to ease the transition from a horizontal plane to a vertical plane. Cant strips can be made of wood, wood fiber, perlite, or other materials.

A material used to cover the top edge of base flashings or other flashings. (See also Coping.)

A granule-surfaced membrane often used as the top ply of BUR or modified roof systems.

A device for locating moisture within a roof system by measuring the ratio of the change to the potential difference between two conducting elements that are separated by a non-conductor.

A substance that effects a chemical reaction and/or the rate at which a chemical reaction takes place. In roofing, catalysts are used in SPF roofing.

metals low in the Galvanic Series.

A material with no elastomeric properties used for sealing joints.

The act of sealing a joint or of material.

The vaporization of a liquid under the suction force of a pump which can create voids within the pump supply line. Cavitation will result in off-ratio foam in Sprayed Polyurethane Foam applications.

100 cubic feet.

A complex carbohydrate, (C6H10O5)n, that is composed of glucose units, forms the main constituent of the cell wall in most plants, and is used in the manufacturing of organic roofing materials.

(Construction Engineering Research Laboratory) CERL conducts research and development in infrastructure and environmental sustainment for the US Army. Together with the Engineer Research and Development Center (ERDC), CERL is working on small and large stationary fuel cell demonstration programmes (“DoD Fuel Cell Demonstration Program”)

A powdery residue on the surface of a material.

(1) A string on a reel in a container that can hold chalk; (2) A line made on by pulling taut a string coated with chalk and snapping it.

Flashing with a built-in channel for runoff; used where roof planes intersect other vertical planes.

A materials ability to retain its properties when it comes into contact with certain chemicals.

CPE is a flexible material with high tear strength, good chemical resistance and patency towards UV radiation. As a result of the high chlorine content (typically 30%) it is inherently difficult to ignite, but releases hydrogen chloride during combustion. It suffers from an extremely high permeability to gas. Resistance to most inorganic chemicals is generally good, while resistance to hydrocarbons increases with increasing chorine content. The material is used mainly as an impact modifier for PVC and, to a lesser extent, LDPE and HDPE film.