Wednesday, May 18, 2011
Expert Advise for Free!
Jerry has just signed up to volunteer as a metal roofing expert on the website http://www.allexperts.com/ where you can go to get questions answered on hundreds of topics. He will use his 35 years in the metal industry to answer questions from all over the world on performance, application, practicality, technical and detail aspects of installing and using metal roofing. This will be a great way for Do-It-Youselfers to get free advice on any part of their metal roofing project. If you have questions, check out the AllExperts website, or even better yet, go right to the source and give us a call!
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2 comments:
On a metal roof how often should you remove the snow that builds up? There was 3-5 feet of snow that fell off last month. Is that a reasonable amount to accumulate or should the snow be removed before it gets to that level. Are there any requirement or guidelines to this?
That is a great question. There are two issues with snow build up. First is the weight of the snow. The weight is a concern for the structure. The roofing is intended to be a weather protection and is not normally a factor in the structural capability of the roof system. Building codes regulate the structural requirements of the building so if the snow is normal, the building is most likely to be able to handle the snow load. Where snow buildup can be a problem for a metal roof or any roof for that matter, is when the snow turns into ice dams at the eave of the roof. When this happens, the ice becomes a water dam and when the snow melts in the field of the roof from the building's internal heat, the water will flow toward the eave. When the water meets the ice dam it will back up on the roof surface and possibly flood the seams of the roofing system. This is a common concern in very cold areas on buildings with overhangs. The other concern of snow build up is knowing when the snow will eventually slide and fall. This is obviously a safety issue but can also cause damage to the building or other roofs below.
Other than the snow sliding off more easily from a metal roof, there are really no other concerns that are not shared with all roof systems.
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