Since the beginning of civilization, roofs have always been made from different materials. At present, there are hundreds of materials in the market that can be used for roofing which range from composite materials, metal, wood, rubber, aluminum, rolled roofing, and even asphalt. Each roofing material is specifically tailored for roofing in certain climates and conditions. Asphalt roofing and corrugated metal roofings work better with dry and moderately warm climates while metal structured panels work better on wet and snow-heavy areas.
The choice of materials for roofing is also dictated by the personal preference of homeowners with some shingles and roofing material having more aesthetically-pleasing texture and appearance. There is also the matter of the owner’s financial budget for certain materials and more economical roofing material is usually preferred.
One very important factor that homeowners have to keep in mind as well as the pitch of metal roofs. If the inclination of your metal roof is too steep, certain materials will not work correctly for your roof. Heavy materials like asphalt shingles have to be kept on certain elevations since it can wear off the fastening if not properly placed on a certain pitch.
Roof pitch is a term that is widely used in the United States to determine the ratio of inclination of a roof in correlation to the roof’s horizontal width. The ratio often looks like 2/12 or 2:12 as a measurement.
The calculation of the pitch of the roof is basically the rise of the roof for every 12 inches horizontally.
Interpretations of the measurement:
2:12 would me that for every 12 inches of the roof, the inclination will rise by 2 inches vertically. Likewise, 5:12 would mean that the roof rises 5 inches for every 12 inches of the roof horizontally.
There are extreme instances were roofs will have a low pitch of 1/12 or 0.5/12 which is most common on flat rooftops on warmer climates and 12/12 which is quite common in colder climates since rain and snow will slip easier on steeper inclinations.
Low pitched roofs – These types of roofs are quite prevalent among modernist houses. During and right after the second world war, there was a rapid change in architectural designs as well as technological innovations to materials used in roofing. Usually, the pitches of these roofs would rise up by an inch for every 12 inches. Although this makes water run off slower from roofs, it does give roofs a good aesthetic quality.
High-pitched houses – These types of roofs are more prevalent among classical and Victorian-era houses and houses right before the turn of the 20th century. The steep nature of the roofs makes this a great style for houses that are situated on colder and wetter climates. Pitches in these types of houses are so high that it can even reach up to 18/12. A good example of a high-pitched house is found across the older streets of London.
Roof pitches with lower angles – These are usually found in industrial buildings and shacks and a have a more functional approach. This is quite prevalent among modern designs and will usually have a pitch of 1/12 to 2/12.
Homeowners have to always keep in mind that some materials will be harder to install in higher pitches. For each panel that’s being used, there is always a minimum slope requirement so that the material will not deteriorate or even fall off if not fastened properly. The roof of a metal roof is designated through pitches. As discussed, shingles placed on roofs have an average of 2/12 – 4/12 in pitch because of the accumulated weight.
There are considerably more materials that are available for low-pitched roofs but careful planning and observation have to take place before plans can be executed. Homeowners are recommended to install supporting seam panes to help firmly fasten the panels. These panels are best installed on the horizontal beams of the roof. It is best that skilled roofers will work on these types of slopes since improperly installing these materials and structure can lead to long-term damages and potential roof replacement.
Overall, if you are not sure with the materials that you will be installing on steeper pitches, then it would be to your best interest to avail the services of roofing Cherry Hill NJ who can do extensive roof surveying while providing the right tools and supplies to install the right materials for your roof.