![]() Notice that the low sloped roofing and the steep sloped roofing have different flashing height requirements to avoid leakage, which is because the steep sloped roof will always be sloped away from the flashing and therefore does not require as much flashing height however conversely the flat or low sloped roof could have a large flat area in front of the flashing which does not slope away and therefore requires more flashing height. ![]() The NRCA says that the flat roof or low sloped roof flashing height must be at least 8 “ tall to avoid leakage, while the steep sloped roof detail might require a flashing as low as 2.5” tall. The flashing, is simply the specialty roofing detail, performed at the chimney or any other protrusion. In order to avoid leakage, flat or low sloped roofing requires taller flashing heights than steep slope roofing. If you are installing roofing and flashing around a chimney (for example), the NRCA detail would denote how high the flashing must be to keep the water from breaching over the top of the flashing. In short, the NRCA provides diagrams that denote the minimum flashing heights for every possible roofing scenario. Rules for Steep sloped roofing aka sloped or shingled roofing.Rules for Low sloped roofing aka “flat roofing”.There are two sets of NRCA specification details or “rules” for roofing to follow. The properly designed roof is always providing the desired path of least resistance for the water to flow. Roofers install roofing materials, and the physical characteristics of that roofing material directs the rain water to flow in the desired direction while stopping the water from going into the building. When you, or a contractor, follow the rules and perform proper installations, the roof or roof edge will not leak, however if you deviate, add roof burden, cut corners, or minimize coverage, mother nature will prevail with wind driven rain that will seek out and exploit the weakness with leakage problems.Ģ Different Sets of Roofing Rules: Storm water will always take the path of least resistance. Gutters, drip edge and shingles are noted in the NRCA roofing specification details. The NRCA, “National Roofing Contractors Association”, provides text book details, diagrams, and essentially rules to follow for the correct installation of all roofing and flashing components. When the rules are followed, homes, roofs and buildings will not leak. Many people do not realize that there are roofing text books as well as rules of roof and flashing installation. Properly installed gutters will not leak into the building. Some Leaf Guards cause no problems - leaf guard inserts.How to stop gutter ice backup problems and wind driven rain backup leakage.Who's altering MY roof? A gutter guard company, No Way!.How could a gutter guard do harm, if the gutter never leaked prior?.How can a leaf guard cause the fascia board coverage height vulnerable to leakage problems.Joint between the fascia board and the drip edge can be vulnerable to leaf guard installation problems.Gutter Guards that connect to the fascia board can cause leaks.Gutter Guards that attach to the roof can cause roof edge leakage.Why clogged gutters should never leak into the building.This article will elaborate on the below topics. Most people are busy searching “what is the best rated gutter guard” in consumer reports, when they might be better served asking “ which gutter guard will provide clog protection and do no harm”. In the remainder of this article, I will use my 25 years of hands-on roofing experience, to try to explain how and why some commonly used leaf guard installation techniques could actually cause leaf guard problems. Once again, a properly installed and even a clogged gutter should never leak into the building, however the alterations people make to install a leaf guard can cause gutter and roof problems and leakage. Properly installed soffit, fascias and gutters should never be the cause for problems and rain water leaking into your home or building, however alterations to gutters, breaking the rules of roofing and flashing, installation of sheet metal items without the necessary flashing height and coverage, as well as mishandling of roof shingles, all can lead to roof edge water leakage problems. Like anything in life, if you keep it simple, you can get by or even improve your gutter and downspout drainage situation, however if you get too complicated, you can actually cause yourself some harm and take a few steps backwards. Leaf guards did not even exist forty years ago, yet today, everyone is willing to try just about anything in order to get a gutter leaf guard that will save them time from cleaning gutters and keep the rain water flowing. Can Leaf Guard Installation Cause Problems ?
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