Unvented-house-roof, unvented house roof. in this episode, we are joined by jonathan smegal, m.a. near-term – the moisture content of the roof sheathing b. in cold climates, insulating sheathing must be added exterior to the roof sheathing to prevent condensation on the underside of the roof sheathing.. Unvented flat roofs a technical discussion flat roofs have often been built with the insulation all on top of the vapor closed drainage plane - as this avoids dew point condensation issues inboard of the roofing. however in many situations the insulation may need to be primarily or entirely below the flat roof membrane and between the roof joists - if so, what are the best options?, unvented roof assemblies, such as conditioned attics and unvented cathedral ceilings, are becoming common in north american construction. these assemblies are created by eliminating ventilation openings and moving the thermal, moisture and air control boundaries to the plane of the roof deck..

Foam-tech creates superior insulation and environmental control solutions by installing safe, cost-effective, and environmentally-friendly polyurethane foams. we have the capabilities to spray and inject a variety of foam systems to achieve a high r-value while providing both effective vapor and air barriers. all of these materials are supported by quality assurance testing capabilities that ..., the quest for greater energy efficiency in buildings has led to increasing interest and need for insulation, improvements in hvac equipment, more airtight construction, new materials and assemblies. senior engineer manager at icynene, john broniek makes the case for the unvented attic assembly and why insulating the underside of the roof makes sense..

If you have been considering a new roof installation, looking into adding insulation to your home, or are planning to build a new house, you may have heard people talk about “hot roof” and “cold roof” systems. however, you may not be familiar with these concepts, particularly what they mean and the pros and cons of each., so much information has been devoted to the subject of roof venting that it’s easy to become confused and to lose focus. so i’ll start by saying something that might sound controversial, but really isn’t: a vented attic, where insulation is placed on an air-sealed attic floor, is one of the most underappreciated building assemblies that we have in the history of building science..

3. roof vents remove warm air during the winter. too many people believe that because heat rises, ventilating an attic space during the winter means you’re releasing warm air and creating a drag on your heating efficiency., energy unvented flat roofs: theory meets practice in rural vermont moisture sensors and data-loggers at critical locations in an unvented flat roof are providing builders the information they need to understand the performance of advanced components and systems.