Working at heights on a roof presents fall hazard risks and other safety concerns. IKO recommends that roofing work be done by qualified professionals who know the best way to shingle a roof and have been fully trained in all aspects of roof construction safety. Further, it’s important to review local applicable building codes and ensure the roof conforms to all requirements.
Understand the physics of how a sloped shingle roof works. Asphalt roofing shingles simply rely on the force of gravity to shed water from rain or snow melt. If the roof shingles and all accessory roof components are arranged and overlapped with this in mind, the roof should successfully shed water. In the dictionary, “to shingle” is defined as “to lay out or arrange so as to overlap.” So now let’s look at the sequence of overlapping roof construction components to see how this applies.
Deck preparation. Before installing any roofing materials, make sure that the roof deck is smooth, properly fastened to the roof trusses, dry and free of any gaps or holes. Having a clean, flat deck surface will help ensure that the newly shingled roof will likewise appear smooth and flat when finished.Not only are we working from the bottom of the roof, we’re also starting with the bottom-most layer, in terms of roofing components. The asphalt roof shingles are the visible part and the first line of defense against inclement weather, but what’s underneath them really counts.The first material installed at the eave is the drip edge. It literally provides a clean, sharp edge for the start of the roof and protects the lower edge of the roof deck from water damage by preventing water from “defying gravity” and wicking back “up” before it leaves the roof.
February 4, 2016