Tag Archives: Underlayment

Looking for a Metal Roofing Contractor? Here Are Some Things to Consider That Should Help You Make the Right Choice

Not all metal roofing contractors are alike. Some are big, national companies with the ability to coordinate and staff a wide range of residential and commercial projects. Others are small family-owned companies with a couple of full-time people who hire part time workers depending on the size of the job.  Regardless of the size, you want a company where the professionals will deliver a quality metal roof system at an honest price. Here are some questions you can ask and some guidelines you can follow to help you make that choice:

1. Make sure the metal roofing contractor licensed. Many states require a roofer be licensed in the state; however, all states are different. Check the code requirements in your area. And be sure the roofer’s license is up to date. Continue reading

The Abc’s of Standing Seam Metal Roofing: Structural And Architectural

Standing seam metal roofing systems can be divided into two basic categories: structural and architectural.  Structural and architectural systems are designed, engineered and installed to satisfy different metal roofing requirements.

Architectural metal panel roof systems and structural metal panel roof systems are installed over a large variety of substrates. There are two general categories of substrates: continuous or closely spaced decking that provides solid support for the metal roof panel, and the other is composed of spaced structural supports (such as purlins) where the metal panels must span between supports. Most structural metal panels are used over spaced structural supports without being supported by a solid roof deck. Continue reading

Design Your Standing Seam Metal Roof for Optimal Performance in Cold Weather Climates

If you’re planning on installing a new standing seam metal roof and you live in a cold weather climate with snow, keep in mind some design considerations that, in the long run, are sure to protect you against problems with snow and ice accumulation and removal during the winter months. Here are some tips:

  • Choose a design with a cold roof. Keep the entire roof as cold as the eaves. Ventilating the underside of the roof, insulating the attic floor, and plugging air leaks are usually the answer.
  • Consider a roof color with a high solar absorption value that will help thaw snow and ice.  Colors such as bronze, brown, or dark gray versus white or light earth tones will help do the trick. Continue reading

Choose the Right Underlayment Material for Your Metal Roofing Project

Underlayment products for use beneath standing seam metal roof systems should be carefully selected to provide a roof system that performs optimally throughout the life of the building. Several considerations must be addressed in the roofing system design, including ensuring that the four barriers needed in any building enclosure i.e., water barrier, thermal insulation barrier, vapor retarder, and air barrier are provided and are in the correct location for a given climate.

Long term, in-service roof performance can be affected by several important factors including: the metal roofing system and its expected service life, the climate at the building location, roof slope and geometry, and ambient conditions (temperature/relative humidity) within the building.  Improper selection of the roof underlayment may allow roof leakage or entrap moisture due to vapor diffusion or air exfiltration, which may accelerate deterioration of concealed components, shortening their service life and necessitating repairs.  Further, to provide longevity the underlayment should match the intended service life of the metal roofing system.

Metal roofing underlayment from Englert, Inc.Structural metal roof panel systems are designed to span structural supports without requiring a structural deck.  Hence, they do not typically include roof underlayment since the installation lacks a continuous substrate or deck to support the underlayment material.
For architectural metal roof panel systems, a roof underlayment is required to help control water leakage through the roofing system during heavy rain storms or under snow melting conditions. Upgraded roof underlayment is often specified in cold climates for additional protection against ice dam leakage, while high temperature underlayments are designed for use in high temperature environments where the in-service temperature can reach temperatures as high as 240ºF. Continue reading

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