Why a flat-seam facade?
Thin profile, flat in plane, interlocking metal panels are easy to install and provide maximum design flexibility especially with patterns, sizes, and tile shapes while also minimizing the use of resources by using less. Smaller unit sizes have a positive effect on wind resistance and thermal expansion control. In combination with an ASV mat and a quality membrane underlayment, flat-seam tiles can also be used in steep-slope roof assembly as a “drainscreen” cladding.
Why standing seam metal facade?
Regardless of the metal type, many vertical-seam metal profiles provide outstanding weather protection when installed as a facade cladding. In particular, 1″ single-lock (90° mechanical-seam) metal panels with a 8-10 mm ventilation mat/ structured underlay (see MetalVent page) over a quality weather barrier membrane create a low-cost rainscreen assembly (aka: “drainscreen”). Dry-joint metal cladding like standing seam reduce the need for sealants, provide design flexibility for horizontal, vertical, or diagonal installation patterns as long as the joint face sheds water. Either structural steel (SS), used for most snap-seam profiles, and low-yield foldable steel can create a very economical, colorful, and low-tech drainscreen system. Natural weathering metals like copper, zinc, and weathering steel also make good choices.
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