Does stucco need expansion joints?
Stucco does not require expansion/contraction joints (also called control joints) when directly applied to concrete, concrete block, or other masonry, except where there is a change from one material to another.
What is an expansion joint in stucco?
Expansion joints are vertical or horizontal joints used in stucco or masonry that are left free of mortar. These joints allow for expanding or contracting due to thermal and moisture issues. Control joints, on the other hand, are used for concrete applications.
Does stucco expand contract?
The stucco facade on any building will expand and contract with temperature changes. These differences can lead to cracking and delamination of the stucco, in addition to breaking away from adjacent surfaces and leaving an open channel for water intrusion.
What are control joints in stucco?
First, let’s look at some definitions: A control joint is a single prefabricated stucco accessory, applied to the surface of—or incorporated within—the metal lath to allow for the shrinkage of the stucco cladding typically associated with the curing or hydration process.
What is the maximum allowable area between control joints for a stucco wall?
144 sq. ft.
per ASTM C 1063 – recommends that Control Joints be used to delineate stucco areas not greater than 144 sq. ft., or at maximum distance of 18 feet between Control Joints.
Does my slab need an expansion joint?
If a concrete slab is too big and doesn’t have expansion joints, when the structure shifts, vibrates, expands or contracts, the stress and pressure finds relief by cracking. Expansion joints are used to prevent these cracks.
Where do control joints go in stucco?
Control joints are installed by the lather. They should always be expanded flange, wire-tied to the lath itself. Control joints are a function of the lath/plaster assembly – not a function of structure.
What is a stucco reveal?
AMICO Vinyl Angled Stucco Reveal creates a unique architectural break in the surface area of a stucco wall or ceiling. The reveal does not perform the function of an expansion / control joint since the bead does not allow any movement.
What do industries use expansion joints?
Pump Layoutypes of Materials. The first thing to think about when looking for expansion joints is the pump’s layout.
What are expansion joints used for?
Expansion joints are used to prevent these cracks. Joints are used in areas where two slabs of concrete meet, when a slab meets another concrete structure like a wall or when a span of concrete is overly long. For example, a 100 ft. concrete sidewalk wouldn’t be poured in one long slab. You’d get lots of cracks.
What are the different types of expansion joints?
What are the different types of expansion joints? In general, there are fabric, metallic, and rubber expansion joints. At U.S. Bellows, we manufacture: * Metallic Expansion Joints. Single Expansion Joints. Hinged Expansion Joints. Gimbal Expansion Joints. Universal Expansion Joints. Elbow Pressure Balanced Expansion Joints.
How to install strip seal expansion joints?
Strip Seal Installation Procedure. The TechStar strip seal joint will arrive either completely assembled or requiring a weld in the field. This is dependent upon the width of the roadway at the expansion joint location or if stage construction is required.