The rigid foam can be installed over new sheathing coated with an integrated water-resistive barrier as shown in Figure 1 or the insulation can be installed over the existing roof sheathing, which is first covered with a fully adhered air control membrane that extends up the parapet sides above the flat roof as shown in Figure 2.
Roof failures typically occur from leakage of bulk water (precipitation) or vapor diffusion condensation. Most often, flat roof assemblies are designed and constructed without a proper air-control layer and focus only on the thermal-control system (insulation). By designing the roof enclosure system properly, most if not all failures can be ...
Lorne Ricketts, MASc, P.Eng. is a Principal and Building Science Specialist with RDH Building Science Inc. and specializes in new construction, investigation, research, and education projects. Recently, Lorne co-led the development of the Illustrated Guide to R30+ Effective Vaulted & Flat Roofs in Residential Construction.
At sites primarily occupied by the building footprint, a blue roof, also known as a controlled flow roof drainage system, is an option to detain stormwater and satisfy these requirements. This article will focus on blue roof design considerations, including selecting a waterproofing system that accepts long-term ponding water . . .
A flat roof looks and performs very differently compared to a traditional sloped roof such as shingles, tiles, or metal. While its not designed to be a water shedding system, because it has a low pitch, flat roofing can still protect your home from leaks and severe weather. Today, there is a wide range of cutting edge flat roof systems that offer distinct pros and cons, longevity, and of ...
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?
Top Five Sustainable Materials to Consider for Your Roof. ... acrylic elastomeric coatings and emulsion over commercial flat roofs to extend their service life. For more information about SUNVEK, please visit www.sunvekroofing.com. ... Building Enclosure. Summer 2019.
This Measure Guideline provides design and construction information for a deep energy enclosure retrofit (DEER) solution of a flat roof assembly. It describes the strategies and procedures for an exterior retrofit of a flat, wood-framed roof with brick masonry exterior walls, using exterior and interior (framing cavity) insulation. The approach supported in this guide could
Sloping Roof Style. This is just a flat roof design thou it slants slightly. It seems like the designs tries to solve some of the disadvantages of a flat pool enclosure roof. This design is such that, the roof makes an angle less than 90 degrees to the wall on one end and an angle greater than 90 degrees on the opposite end.
Replacing a roof can be expensive, but if a roof contains only a small slope, it's possible to raise the roof pitch of a house by building a roof over the old one. This new roof with a higher pitch can be accomplished with premade roof trusses and typical asphalt shingles.
The concept can be applied to almost any flat roof, and low-slope or high-slope configurations are possible. In essence, a steel framework is erected over the existing roof. It is ready to accept metal panels. Then, a high-performance, low-maintenance standing seam metal roof is installed.
Constructing a vented “over-roof” over the top of an unvented “under-roof” is common in high snow load areas to control ice-damming (see “BSI-046:Dam Ice Dam”). Air barriers have always been a big deal in flat roofs in cold miserable places like Canada even with black roofs.
Company JOB TITLE Example 3 - 157' Building, flat terrain Address City, State JOB NO. SHEET NO. Phone CALCULATED BY DATE other CHECKED BY DATE Enclosure Classification Test for Enclosed Building: A building that does not qualify as open or partially enclosed.
Water build up on the surface since there is no slop that allows for water drainage. ... It seems like the designs tries to solve some of the disadvantages of a flat pool enclosure roof. ... As you can see from the image above, the pool enclosure is constructed using curved aluminum rods and polycarbonate enclosure.