Repointing: Less is not always more

When repointing mortar joints in an existing structure, successful long-term performance depends on a number of factors. A lack of understanding of substrate materials and conditions, insufficient joint preparation, less than adequate skill or care during mortar installation and curing, and an overly limited repointing scope can lead to...
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Five common failures in curtain wall installation

Curtain wall installation requirements, means, methods, and materials continue to evolve, yet many of the basics remain the same. Most curtain walls have similar installations, but differ on size, location, alignment, and anchorage of components. Here are some of the critical areas to focus on for a successful curtain...
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What lies beyond the veneer?

Water leakage through the exterior wall was reported at a 30-year-old, one-story commercial building in the Midwest. The building had been constructed with concrete masonry unit (CMU) bearing walls clad with brick masonry veneer, and steel open-web joists supporting a steel roof deck. The portion of the building experiencing...
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Dutchman repairs

Dutchman repairs are used to permanently repair cracked, spalled, or deeply eroded stone units. The installation of a dutchman repair begins with the preparation of the substrate by cutting, chipping, and grinding the damaged portion of the parent stone to a squared-off profile.
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Controlling air

In most climate zones within the United States, a dedicated air barrier is required by code as part of the building enclosure to control and manage airflow between the conditioned interior and exterior environments.
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Membrane seepage

Can a waterproofing membrane leak if it has no holes? Unfortunately, yes, under fairly common circumstances. If drainage is absent or impeded, water can slowly migrate directly through the membrane.
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