Expansion Joint Covers

Expansion Joint Use

Roof Expansion Joints are recommended to be provided for any one or more of the following minimum conditions.

• When the roof size exceeds 200 feet in any direction
• At all structural expansion or contraction joints
• Where the deck material changes, for example from steel to concrete
• Where the deck material or structural framing changes direction
• Where building wings intersect, such as "U", "T", or "L" shapes
• Where interior heating and cooling conditions change, such as between heated and unheated
• At all building additions of any shape
• Where differential movement between walls and decks may occur

Roof Expansion Joints are recommended to be constructed with raised curb assemblies which canallow adequate base flashing details for the roof system.  Raised curb assemblies can be factory fabricated of galvanized steel to suit all project conditions which expedites and unifies project design and installation as opposed to traditional wood curbs which require extensive field installation time andthorough inspection of construction and attachment.

Over the raised curb assemblies, or at low profile expansion assemblies, the Portals Plus Expansion Joint Covers provide superior watertight integrity.  Along with the standard cover profiles of Curb Flange,Combination Curb & Straight Flange, and Straight Flange, Portals Plus offers factory manufactured accessories available to suit virtually any project condition.  The most common accessories are Cor-ners, Intersections, and Ends.  All factory manufactured accessories are custom made to suit each individual project's conditions, thereby assuring clean seam lines, continuity of joint material, and water-tight integrity when properly spliced with Portals Plus standard splice kits.  Contact Portals Plus for questions regarding any special details or applications.