Waterstops are typically installed by a:

Waterstops are typically installed by a:

• A. Roofer
• B. Concrete Contractor
• C. General contractor
• D. Mason

Answer: (B)

Waterstops prevent water from migrating through concrete joints by providing a continuous barrier at expansion and control joints as the concrete is poured. They are placed into the joint forms before the concrete goes in, and must be positioned correctly so that the barrier remains embedded within the joint as the pour occurs and cures. This work is tightly linked to concrete construction—setting the forms, aligning reinforcement, and ensuring the joint is continuous across the pour. That is why a concrete contractor handles it. A roofer focuses on the roofing membrane, flashing, and surface waterproofing atop the substrate, not the embedded joint device inside the concrete. A mason typically works with masonry units rather than poured concrete joints, and while a general contractor oversees the project, the specialized task of installing a waterstop in a concrete joint is most commonly done by the concrete contractor.

Waterstops prevent water from migrating through concrete joints by providing a continuous barrier at expansion and control joints as the concrete is poured. They are placed into the joint forms before the concrete goes in, and must be positioned correctly so that the barrier remains embedded within the joint as the pour occurs and cures. This work is tightly linked to concrete construction—setting the forms, aligning reinforcement, and ensuring the joint is continuous across the pour. That is why a concrete contractor handles it. A roofer focuses on the roofing membrane, flashing, and surface waterproofing atop the substrate, not the embedded joint device inside the concrete. A mason typically works with masonry units rather than poured concrete joints, and while a general contractor oversees the project, the specialized task of installing a waterstop in a concrete joint is most commonly done by the concrete contractor.