Where Does the Water Go?

BUILDINGS - Smarter Facilities Management

12/02/2013

Where Does the Water Go?

Ensure your roof drains to the right place

By Richard L. Fricklas

 
  • Drain debris

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    Stay on top of roof drains by remembering your ABCDs: Always Be Conscious of Drainage.

  • Crickets

    /Portals/1/images/OnlineImages/2013/1213/rr/2-cricketarrow.jpg

    Crickets and saddles redirect water around equipment curbs and toward drains.

  • Crickets

    /Portals/1/images/OnlineImages/2013/1213/rr/3-crickets_web.jpg

    Crickets can be made of plywood or OSB on the deck level or constructed from coverboards and tapered thermal insulation.

  • Inverted pyramid

    /Portals/1/images/OnlineImages/2013/1213/rr/4-invertedpyramid_web.jpg

    Inverted pyramids are strongly recommended for multi-bay buildings, but are more practical for new construction projects. In existing buildings, consider drain inserts.

There is a real difference between water-shedding and waterproofing when it comes to roofs. In building construction, waterproof means resistant to hydrostatic forces, while water-shedding means a roofing system that redirects water to roof drains, gutters, or scuppers.

How Water Reaches the Right Place
On steeply sloped roof systems, there is no need for the roof system to be perfect. Water generally will run downhill, and for various shingles and shakes, slopes of 3 inches (or more) are adequate to get the water to the valleys and gutters.

For low-slope roofing – generally defined as a slope of 0.25 inches per foot, or 2%, the minimum slope required by code for new construction – workmanship is far more critical. The installed membrane also relies upon accessories such as pitch pans, flashings, and functional roof drains, as well as protection against abuse by other trades.

For reroofing, buildings require “positive drainage,” or no standing water 48 hours after rain falls. When retrofitting an existing roof, we have an opportunity to note whether the existing roof ponds water and to either add new drains or use tapered insulation to eliminate those ponds. 


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Visit our website today to learn about the design flexibility of a Morton building and the endless possibilities of partnering with our designBUILD team.

When choosing a metal-clad building for your next construction project, consider Morton Buildings, Inc., and their designBUILD team, we’ll make your dream a reality. 


Wood construction is both cost and energy efficient. Check out Morton Buildings and our designBUILD team online today to discover all the benefits of post-frame construction.

Search our Trade Pro Directory to find professionals that can help identify energy-efficient natural gas options that save energy and qualify for rebates to save you money.


Visit our website today to learn about the design flexibility of a Morton building and the endless possibilities of partnering with our designBUILD team.

When choosing a metal-clad building for your next construction project, consider Morton Buildings, Inc., and their designBUILD team, we’ll make your dream a reality. 


Wood construction is both cost and energy efficient. Check out Morton Buildings and our designBUILD team online today to discover all the benefits of post-frame construction.


 
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