Whether for a horse barn or riding arena, there are a lot of things to consider in the slope of the roof.
Curious about recommended roof pitches in a riding arena? Senior architects John Blackburn and Ian Kelly advise that “a 4:12 pitch is pretty much our recommended minimum on any horse structure. We prefer steeper roofs for a natural chimney effect. However, unless you live in a cold climate where there is a lot of snow, we wouldn’t advise going taller than 6:12.”
The numbers indicating a 4:12 roof pitch mean the roof rises 4 inches in height for every 12 inches, as measured horizontally from the edge of the roof to the centerline.
Okay, so for barns our rule of thumb is as steep as you can make it. The steeper roof allows the Bernoulli principle and chimney effect to work more efficiently and effectively. But there are other considerations in designing the slope of a barn or arena roof.
For arenas, steeper the roof = the taller the building. This impacts the look or mass of the arena on the property which can be negative. It can stick out like a sore thumb or look like an airplane hangar in your backyard.
Because we depend less on natural ventilation in indoor arenas than in barns, we can get away with lower slope roofs. However, we don’t recommend lower than 4:12 if at all possible. We realize some HOAs and neighborhoods have severe height restrictions and the wider the arena, the more difficult it is to comply without “flattening” the roof. At Winter Farm in Peoa, Utah, we designed a low roof to stay within an imposed limit. In some areas, arenas may be considered agricultural buildings and therefore exempt from height limits. But that rule isn’t consistent across state lines or jurisdictions. For example, in one jurisdiction we were permitted a covered arena as a “sun shelter” and avoided building height limitations entirely.
Because arena walls at the perimeter are usually 16’ tall (need head clearance for horse and rider on interior below the structural frame), when the roof is a low slope, the roof becomes less visible as you get closer to the building and the building can look like a huge box.
You can make a huge box look great but that may require a lot more money and you typically want the arena to be in the background. The barn and the farm are the main focus and not that big ugly box on your farm.
One way we reduce the impact of the arena size is by pushing it into grade where we can, using the land contours and landscaping where possible, and placing it behind the barn and other structures to reduce the scale of the building.
Probably the best average height for a barn is 6:12 to 7:12. The reason is it is more difficult for a roofer to walk on a steeper roof without some sort of support. Thus the installation time increases dramatically as will the cost if it is built with a steeper roof.
One of the down sides for low slope roofs in snow climates is snow loading. A steeper slope can be designed to shed snow pack better than a low slope but the downside for that is the avalanche effect. When it melts it can fall fast, be loud and block doorways… a subject for another blog post!
Just over a year ago, I wrote about visiting a project in Rancho Santa Fe, California that had just began construction. A year later, I am happy to report that the construction effort is complete and was a great success. Lucky Jack Ranch, as its owners have christened it, is located in Rancho Santa Fe California and is made up of a 3,900 sq. ft. clubhouse with guest residence, a 15-stall barn plus a large wash stall, six outdoor tacking stalls, and an open riding arena. The Ranch also has a famous neighbor: the Pacific Ocean.
The family’s private equestrian facilities take full advantage of seven acres of the site, with the structures placed upon an overlook to capture Pacific Ocean breezes, not to mention an ideal view of the sunset. The Ranch emphasizes the leisurely aspects of horse riding, from cool-down trails surrounding the property to a large patio that invites riders to relax and socialize after riding. There’s a romantic feel to the architecture, which was designed as a modern tribute to Lilian J. Rice, the architect responsible for much of the site planning and architectural design within the community of Rancho Santa Fe as it formed around 1922. The architecture is heavily influenced by Spanish and Spanish Colonial design, using stucco, terra cotta, and wood accents. A trellis stretches from the clubhouse to the barn to connect the Ranch visually.
The property focuses on an ultimate rider experience, apparent in the full amenities at Lucky Jack (there’s even a wood burning pizza oven), but there’s no mistaking that this is a serious working horse ranch; complete with a hotwalker, round pen, custom Lucas Equine stall systems that include indoor and outdoor wash stalls, a tack room, and several areas for riders to lounge and observe the activity of fellow riders.
A fully equipped kitchen and dining area in the clubhouse opens to a smaller, more intimate patio space for dining al fresco while the main patio (with that enviable, wood burning pizza oven I mentioned) prompts larger gatherings. Lounge chairs and tables invite riders and non-riders alike to relax and take in the refreshing ocean breezes and unwind. The owner’s family and friends can even stay in the clubhouse, which has two bedrooms, terraces, and a laundry room. The only real difficulty might be getting guests to leave.
Allard Jansen Architects, Inc. of San Diego was a local design consultant and permit facilitator for the project.