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Question: What’s the best way to remove fireproofing from beams and columns in order to attach the top track for steel framing? —F.E., New Hampshire Answer: Ideally, spray-applied fire-resistive material, or SFRM, is...

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Question: What is the intent of the term “nominal” regarding plaster thickness in ASTM C-926? -via eMail Answer: To ensure proper plaster thickness, ASTM C-926 refers the user to “Table 1—Nominal Plas-ter ...

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Question: I had weep screed on my stucco walls, but recently had leaking and water coming through the bottom of the wall. My contractor has now sealed and painted the walls with elastomeric ...

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QUESTION: What do you recommend as a weather-resistive barrier between wood-based sheathing and portland cement plaster/stucco? ANSWER: Some will argue that one layer of building paper (or housewrap), provided it is...

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QUESTION: Is there a standard for dealing with excessive annular space when firestopping through-pene-trations in gypsum board walls? —K.T, Denver ANSWER: The short answer is “No.” However, as is often the case, there...

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Question: In these days of rampant mold litigation, are there special considerations that the spray applied fire-resistive materials contractor should be aware of to avoid problems? —E-mail Answer: AWCI’s technical committee on SFRM...

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QUESTION: I am investigating Type B versus Type D Moisture resistive barriers (paper under stucco) as they relate to vapor transmission. Which is better? ANSWER: According to UBC Standard 14-1, type B has ...

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Question: There is considerable discussion about the proper installation of control joints in stucco, specifically: Is it necessary to cut entirely through the stucco membrane, or will installing a groove in the surface suffice?...

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QUESTION How are latex bonding agents for stucco applications tested? —via e-mail ANSWER ASTM C932, Standard Specification for Surface Applied Bonding Compounds for Exterior Plastering, is used for comparing “exterior surface applied bonding...