Various factors are considered when it comes to installing a roofing system, whether it is a replacement or new construction. These include, among others, the local climate, the roofing material used, and the slope of the structure. Today, The Thomas Roofing Company, Inc., your local roof and gutter installation pros, highlights another factor that isn’t as well-known but is nonetheless important: roof loads.
About Roof Loads
Roof loads refer to the permanent and temporary forces that exert pressure on the roofing system. The specific design of the structure determines the limit of the load a given roof can support. When tackling roof design, contractors would consider a variety of factors, including snowfall, the average wind speed, and the weight of the people who’ll be working on it. By calculating the roof load, they can make sure the whole assembly can withstand these conditions.
Roof Load Types
Here’s a look at some of the most common types of roof loads according to roof repair and replacement pros:
- Dead Load – It is defined as the weight of permanent portions of the building. In the roofing context, it is the weight of the roof structure itself, plus any attached materials or structures. A wood-framed roof with asphalt shingles on the surface typically has a dead load of about 15 pounds per square foot (psf).
- Live Load – It is defined as the weight of temporary objects on the roof. Snow is the primary live load in colder areas. In areas with no snowfall, a roof’s live load can come from people working on the roof, as well as the equipment they take with them. An asphalt shingle roof should be able to support a live load limit of at least 20 psf on top of its dead load.
- Uplift Load – When wind hits your home, its energy gets dispersed upward and downward along the wall. A roof should be able to resist this upward pressure. A 20 psf uplift load is expected for wind speeds reaching a maximum of 90 miles per hour.
The Thomas Roofing Company, Inc. specializes in all types of roofing. When you choose us as your contractor, you can rest assured that you are getting the highest quality materials and a highly experienced professional roofer that knows what they are doing. Aside from working on roofs, you can also rely on us to install siding, gutters, and skylights.
Call us today at (410) 876-3602 or fill out our contact form to request a free quote. We serve residents of Columbia and Ellicott City, MD.