Vapor barrier roof fastener penetrations
Category: 30 Cm
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Shown in Detail 3a through 3d are typical window rough opening details. The opening wrap sequence, including integration with the WRB and AB membrane at the wall area field, is shown in Detail 4, window wrap sequence. The interface where the window system meets the CLT panel is important because it can be a common source for water leakage if not designed and constructed appropriately. Appropriate detailing to provide continuous protection against water and air leakage requires that the WRB is flashed into the rough opening and a continuous air and water seal typically a backer rod and sealant joint is provided around the window perimeter. Best practice in some markets may dictate a metal back dam angle at the rough opening sill to form a sill pan. This angle may also serve as the structural attachment point for the window sill to avoid fastener penetrations down through the rough opening sill.
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The Use of Air Barriers in Northern Climates - GAF Blog
Development and review partially supported through a grant from the RCI Foundation. To select, detail, and specify the most appropriate roof system for a project; past experience with several of the available material options and an understanding of roof assembly materials and system options, and an understanding of roof design considerations is recommended. The purpose of this section is to provide design guidance for designing high-performance low- and steep-slope roof assemblies. This document relies on many other industry standards, which should also be consulted. It is the intent to provide recommendations beyond the content of those standards, especially as they relate to integrating the roofing assembly into a total building enclosure and mechanical system design.
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The Use of Air Barriers in Northern Climates
Class 1 vapor retarder: Less than 0. Often, the CLT itself will meet the required fire rating for the assembly. However, in some cases, an additional noncombustible thermal barrier may be required, such as exterior gypsum sheathing. In these instances, some products can be applied directly to the gypsum sheathing, similar to a typical installation over a framed wall. For construction exceeding 40 feet, Section
If this was a natatorium, however, the resulting damage may include human-sized icicles at roof eaves, concealed corrosion of metal framing components, widespread efflorescence on exterior concrete and masonry, and premature failure of the building enclosure components—often within months. Few, if any, building types present the risks and challenges found in indoor swimming pool facilities. With far higher interior moisture loads than typical buildings and a potentially corrosive interior environment, natatoriums put structural and enclosure systems to the test, especially in cold or even mixed climates. Others were well-designed but poorly constructed, or poorly designed but built exactly as shown on the drawings. Moisture loads and controls in natatoriums The air in a natatorium often contains nearly three times the moisture per unit volume as a typical, non-humidified building.
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