B1020−Roof Construction

Category Archives: B1020−Roof Construction

Making Sense of Sprayed Polyurethane Foam

All photos courtesy Spray Foam Coalition

For decades, the U.S. design and construction industry has turned to sprayed polyurethane foam to insulate and air seal buildings. When used as a roofing material, its monolithic nature allows for a seamless, self-flashing application that can keep out water. SPF can also improve energy efficiency, helping building owners and general contractors comply with energy codes and meet performance requirements for green building programs and certifications.

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G8WAY DC: Innovative UHPC Elements

Photo © Vic Tucker

Ultra-high performance concrete (UHPC) provides strength, ductility, durability, and aesthetic design flexibility while still being highly moldable and able to replicate texture, form, and shape. It is this combination of superior properties that also provides architects and engineers with a new kind of freedom—to design unique, unprecedented UHPC architectural elements that are also sustainable and extremely durable.

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Introducing G8WAY DC: Ultra-high performance concrete has it covered

Photos courtesy Davis Brody Bond

G8WAY DC is a new open-air, multi-use facility that demonstrates that precast ultra-high performance concrete (UHPC) is a suitable material choice for challenging architectural elements that require attributes ranging from light weight and imperviousness to complex shapes. Providing shelter below and a large, landscaped seating area above, the pavilion’s sculpture-like UHPC roof transcends this utilitarian facility into an artistic statement.

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Vegetative Roof Waterproofing for Long-term Performance

Photos courtesy Baystate Medical Center

This article reviews the general advantages—and challenges—of green roofs, including how they fail. It reviews strategies for overcoming those challenges and provides advice for achieving long-term performance from a construction perspective, with an emphasis on waterproofing. Several types of green roof systems and assemblies are discussed, including bituminous, rubberized asphalt, and liquid-applied resin membrane systems.

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