Residential Roof Types Civil Engineering and Architecture 2010

Residential Roof Types Civil Engineering and Architecture © 2010 Project Lead The Way, Inc.

Residential Roof Types • • • Roof Shapes Roof Types Roofs in Architecture Roofing Materials Roofs as Sustainable Space Energy Star Roof Systems Roof Trusses Roof Rafters Roof Pitch Building Codes Roof Pitch and Materials

Roof Shapes Roofs protect buildings and occupants from wind, rain, cold, sun, heat, dust, etc. Roofs add to the visual appearance of a building. Roofs come in many shapes.

Roof Types Shed Low-Slope (Flat) Gable Gambrel Hip Gable & Valley Gable with Dormer Hip & Valley

Roofs as Sustainable Space Natural light creates a pleasant space for occupants and requires less energy for lighting. Istockphoto. com®

Energy Star Roof Systems Energy collected from the sun can be used in the structure. Reflective roofs reduce cooling energy costs.

Roof Trusses Courtesy Isle of Palms, SC Recreation Department A roof truss is a simple assembly of members forming a rigid framework of triangular shapes. Courtesy Leslie Eaves

Rafters are an alternative to trusses for roof support. Istockphoto. com® Rafters are roof beams that slope from the ridge beam to the top of the wall.

Roof Pitch (Slope) Roof pitch determined by rise/run Run 12 in. Rise 7 in. Example: A 7/12 (or 7: 12) (pronounced “seven twelve”) pitch means that the roof rises 7 units vertically for every 12 units horizontally.

Common Residential Roof Covering Materials Standing Metal Seam Clay/Cement Tiles Asphalt Shingles Istockphoto. com® Wood/Cedar Slate

Building Codes • A set of rules that specify the minimum standards for construction • International Residential Code for Oneand Two-family Dwellings (IRC) – Minimum regulations for residential building systems – Adopted by many municipalities – Dictates minimum roof slope by finish material

Roof Pitch and Covering Materials The International Residential Code for Oneand Two-family Dwellings (IRC) provides roof slope requirements based on roof covering. Asphalt shingles • Roof slope must be 2: 12 or steeper. Shallower slopes may be allowed if double underlayment is used. Clay and concrete tile • Deck slope must be 2½ : 12 or steeper. Shallower slopes may be allowed if double underlayment is used. Source: 2012 International Residential Code for One- and Two-family Dwellings (www. iccsafe. org). Reference 2012 for additional roof requirements.

Roof Pitch and Covering Materials Slate and Slate-style shingles • Deck slope must be 4: 12 (33 -percent slope) or steeper. Wood Shakes • Deck slope must be 3: 12 (25 -percent slope) or steeper. Metal roof panels • Slope. Varies by type Source: 2012 International Residential Code for One- and Two-family Dwellings. Reference 2012 IRC for additional roof requirements.

Roof Pitch and Covering Materials Low-slope roofing materials • • Built-up roofing Modified bitumen roofing Thermoset single-ply roofing Thermoplastic single-ply roofing – Roofs shall have a minimum slope of a minimum ¼: 12 (2 -percent slope) for drainage Source: 2012 International Residential Code for One- and Two-family Dwellings. Reference 2012 IRC for additional roof requirements.

Identify the Roof Type Istockphoto. com®

Identify the Roof Type

Identify the Roof Type

Identify the Roof Type

Identify the Roof Type

Identify the Roof Type

Identify the Roof Type

Image Resources i. Stockphoto. Retrieved March 16, 2010 from http: //www. istockphoto. com/index. php Microsoft, Inc. (n. d. ). Clip art. Retrieved May 26, 2009, from http: //office. microsoft. com/en-us/clipart/default. aspx