Mechanical Seam Metal Roofing
Snap Lock Panel is the most commonly installed type of standing seam metal roofing in Columbus. Unless specified otherwise, this will be the default standing seam in Columbus. Metal Roofing in Columbus that metal roofing contractors will recommend. It is long lasting and far less labor intensive, making it more economical to install. This system is attached with fasteners at the top, then clips are hidden along the sides of each panel to allow for thermal expansion and secured along the sides. The primary application is for roof slopes above a 15 degree angle or steeper and will handle most residential wind loads up to 200 MPH. Finishes are available in Kynar 500 (PVDF PolyVinyliDene Fluoride) or SMP (Silicone Modified Polyester) and is available in 24 gauge or 26 gauge galvalume steel.
The Mechanical Seam Panel is the most durable, water tight, wind resistant,, and structurally sound standing seam roof system on the market. It also is very labor intensive, making it one of the most expensive. It comes in any width between 9 1/2" and 19 1/2" with a 1 1/2" and 2" standing seam and two separate levels of water tightness. The single lock crimps the top panel's leg over, creating a water-tight seal. The double lock is clamped together with a machine, creating an extra tight seal to keep out water and withstand extreme wind loads. The panels span over open framing up to 2 ft with 24 gauge metal, and up to 4.5 ft with 22 gauge metal, while maintaining waterproof integrity. This system also uses a hidden clip which allows for the thermal expansion of the panel. Once the panel has been double locked, changing a damaged panel is no longer an option. This means the entire section must be replaced.
The Snap Batten system is used primarily for curved, arched, or vaulted roofs. This system uses a hidden interlocking clip that fastens the panel and the batten strip to the roof while allowing for thermal expansion. It is available in virtually any width. The panel can be either straight, concave, convex, or any combination of these patterns. This panel has excellent wind load performance and when curved, resists wrinkling. This roof system is the most labor intensive of all the systems and requires the highest level of expertise.
The corrugated system is the most economical of the metal roof family. A thinner gauge and more efficient use of metal to cover the roof area requires less steel per square foot. This characteristic lowers the cost of the materials, labor, and transportation. Due to the low cost, this product is commonly used in agricultural structures, churches and residences. It has very high wind load resistance and can be installed over open framing spanning up to 2 feet. The sides of the panel overlap giving the panel a seamless look. An anti-siphon groove prevents water from leaking through at the seams. The striations prevent "oil canning" (wrinkles in the metal) and when the fastener is placed in the ridge, this raised area keeps the fastener hole out of the water channel. Since the fastener penetrates through the panel, it relies on a rubber grommet between the screw and the panel to maintain water tightness. This washer usually lasts about ten years and will need serviced. The finish on corrugated panels has the same energy star rating as all other metal roofing products, but is only offered in a Silicon Modified Polyester (SMP) finish that is prone to fading.
The screw line system (also referred to as nail line panel) is the most economical standing seam roof type that does not require fasteners penetrating the panel and has the same appearance of the snap lock. The rib measures 1 " high, panels are 26 gauge galvalume steel with an Kynar finish. This roof is usually found on industrial buildings, warehouses, and other large commercial buildings. Its price falls between that of corrugated and standing seam roofs. The key to the great value in this product is a combination of thinner gauge metal, and the use of a slotted fastener hole in lieu of a separate clip. This allows for a quicker installation and lower overall labor and material cost. The panel featured in the above photo has the striation option which are tiny bends in the flat of the metal that hide oil canning (wrinkled looking).