Today’s asphalt shingle roofs may look simple, but underneath is a complex system that ultimately helps protect your home from virtually any weather condition. In today’s post, local roof repair and replacement company Expert Contracting shares an under-the-hood look at a modern asphalt shingle roof’s key components.
1. Framing — The framing functions like the roof’s skeleton, defining its slope, shape and structure. Framing is typically made from treated timber. Components such as rafters and trusses form the support system that the rest of the roof’s components are installed onto. If properly built, roof framing can be used on multiple roof installations.
2. Decking — The roof deck is made of thick plywood or oriented strand board (OSB) that’s nailed to the rafters. Roofing components including underlayment and asphalt shingles are fastened to it. During roof replacement, decking also provides a flat plane for roofers to walk on. In addition to standard boards, some roofing systems feature tongue-and-groove decking.
3. Underlayment — The underlayment is a waterproofing barrier that’s installed over the roof deck. While it looks similar to tarpaulin, a standard underlayment is made of material that allows the decking to “breathe” by allowing moisture underneath to evaporate. Most roofing systems utilize synthetic underlayment, though traditional asphalt-soaked “felts” are still utilized, as it adds stiffness to the finished roof.
4. Starter Strips — The first row of shingles, installed at the roof edge, is called the starter strip. Unlike the rest of the roof, starter strips are installed as a single roll of material. They are reinforced with adhesive that enhances resistance to wind damage.
5. Asphalt Shingles — The rest of the asphalt shingles—the main part of the roof—follow the starter strip from the bottom to the top. Each shingle requires a specific number of fasteners and installation pattern.
6. Flashing — Flashing protects vulnerable areas like dormers and valleys. While most types of flashing are made of metal, some of them are not. Rubber boots, for instance are made of rubber, and they protect the base of vent pipes and other similar components that penetrate the roofing plane.
7. Ventilation — Roof ventilation utilizes the natural rising movement of warm and humid air to passively vent it at the ridge vents. The resulting negative pressure pulls cool, fresh air through the intake vents located at the soffits.
Expert Contracting is one of the leading roofing companies serving Hamburg, NY, and surrounding communities. Give us a call at (716) 572-7303. You can also fill out our contact form to schedule an appointment.