TerraCORE Panels Corner Joints

High-Quality Stone Veneer Panels

TerraCORE Panels offers 3 types of joints that can be used where outside corners adjoin. The first, and most common joint is an outside 90-degree finished corner that is prefabricated in the factory and shipped assembled to the job site. For an additional cost, this corner can also be fabricated with a greater or lesser degree of return. Note, generally a typical corner return leg is 3″ to 6″, however they can be made as long as 23″ in either direction when using a honeycomb substrate. Returns on any other substrate should be limited to 2″. They can go up to 4″ but risk possible breakage during transportation.

The second, and least expensive of the joints, is a quirk miter. Each panel is manufactured with a mitered or rebated (cut back at a 45° degree angle) edge, then sealed with a backer rod and caulked with a structural silicone sealant. The choice of silicone color will depend on the color of the stone being used, and if the sealant is actually going to color blend with the stone, or be used an as enhancement or accent line. Lightweight stone panels that feature quirk miter joints are easy to install.

The third type of corner joint is the “open joint” or dry joint where sealant is not required. This joint is intentionally left open to allow moisture and air to flow through the system, alleviating pressure behind the cladding and helping avoid water leakage. The honeycomb CORE material is mitered / rebated in the factory and installed on panels on the first, second, and third floors. This added step keeps the CORE material on the lower levels of the building from being visible. Above the third floor, this feature is not necessary, as it is impossible for the naked eye to see a 1/4″ to 1/2″ gap that high.

The Joint Gap Process

A joint gap is defined as the horizontal or vertical gap between a TerraCORE stone panel and any adjoining material(s), or the gap between two adjacent panels. We suggest a 3/8″ joint gap; however, this gap can range between 1/4″ to 1/2″ ( view drawing TC-7). Here are a few things to know about the process:

  • When a joint gap is to receive a sealant, a flexible round foam polyethylene, butyl rubber, or polyurethane, known as a backer rod, is inserted and pushed toward the back of the open joint.
  • After the backer rod is put in place, a structural silicone sealant is gunned into the joint.
  • If water was to get past the sealant, the TerraCORE cladding system is designed with a drainage cavity to allow water to drain down and out instead of into the building. View drawing TC-2

Go to our downloadable CAD details for more information

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