b"BUILDING CODEBUILDING BETTER ROOFSWhen I was growing up, my father loved to play with words, usually during our family dinnertime. It stuck, and when I had kids of my own, we often played with words, usually during dinner. It became competitive and was, you might say, sort of a contact sport. If you know me, you know I cannot resist messing around with language. So, indulge me a little. Built BC ToughEaves-drop, /vzdrp/ (verb), means to secretly listen to a conversation. The word first referred to the water thatMade to fell from the eaves of a house, and then came to mean the ground where that water fell. Eventually, an eavesdropper wasweather used to describe someone who stood within the eavesdrop of the house to overhear a conversation inside. 2 anything, Can I tell you a secret? Step a little closer, here under thelike BC eaves, so you can hear me whisper it: Membrane protection at the lower edge of an asphalt shingled roof is required by thewintersBuilding Code on most roofs.There is a not-so-secret myth circulating among roofing contractors, and perhaps even designers, that eave protection on shingled roofs can be dropped during the installation of asphalt shingles 3because it is not required by the Building Code, particularly when the building is constructed in rela-tively warm climate zones like Zone 4 and parts of Zone 5. Some might even argue that eave protection isn't required when the roof has little or no overhang (extension past the exterior wall). Those eaves-droppers take their direction from a misunderstanding of the requirements in Article 9.26.5.1. But that is a recipe for disaster, and I will explain why a selec-tive reading of Section 9.26. can lead to dire results. To close this article, I will also highlight some of the ways shingleBC Roof Vent roofs can be constructed to better serve owners, because when owners are better served, it benefits the reputation of 50 Sq.In. NFAthe roofing industry as a whole.Low profile & CSA approved For pitches 3/12 to 12/12 Crush, dent & corrosion resistantIT CAME UPON A MIDNIGHT CLEARDuring cold winter months, when temperatures drop below5 in 1NEW0C and roofs are covered in snow, leaks are most likely toRoof Flashingoccur near the eaves. These types of leaks occur in almost any climate zone, but they are more common in cold climate 5 sizes in one productzones (Zones 5/6 through 8). They happen after a snowfall Cold impact resistantandasoutsidetemperaturesdrop(oftenonclearnights); Fits 1.25 to 4 vent pipepeople turn up the inside heat, and as heat energy works its For pitches 3.5/12 to 12/12way into the atticbecause there is no air barrier to arrestWeatherPRO air leakage, and insulation in the attic is thin or compro-mised (usually in older buildings)the attic and roof deckSlantBackwarm up, even to just a fraction of a degree above freezing.N G FIRE Because snow is a good insulator, the shingles also warm up. 4 DI C O Can be usedConduction does the rest: the bottom of that wonderfullyU IL D as an intake vent B Ewhen fire codeinsulating snow melts and the water trickles and even runsprevents conventionaldown to the eave, only to re-freeze and form a thin layer ofFRIENDLY soffit vents, 50 Sq.In. NFAice once the water reaches cold air. CSA approvedThis cyclical phenomenon produces a progressively thickerFOLLOW US durao.comlayer of ice until the resulting ice dam forces melt water upCanplas theslope.Aswaterispushedupward,itfreezesbeneathIndustries Ltd. 1-604-455-0432each successive course of shingles. If the eaves havent been www.rcabc.orgl13"