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Does the compound have trouble binding to the galvanized unit?
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The cement binds to Insta Arch® in the same manner as a cornerbead. To improve the binding affect of the cement, lightly block sand Insta Arch® after it has been nailed into place in desired doorway.
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Should any extra steps be performed to ensure quality to avoid cracking or settling?
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Additional steps involved during installation can lessen the risk of cracking but can never ultimately stop settling cracks due to normal house movement. To ensure a more improved product, either paper tape or fiberglass mesh the nailed edges of Insta Arch®. For added support, wood blocking may be installed on 45º angles in the corners before installation to provide extra backing for fastening and durability.
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Can Insta Arch® be coated in with any type of joint compound?
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Yes. Any common joint compound may be used in the taping process. The recommended process is to fiberglass mesh or paper tape the nailed edges, mix Durabond Easysand 20/45/90, and coat-in the entire unit. Process the 2nd and 3rd coat with regular joint compound.
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When cementing in Insta Arch®, how much of the unit should still be exposed after the 1st coat?
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Once the 1st coat has been processed, the entire Insta Arch® unit should appear to be completely buried in joint compound. If part of the unit appears to be showing after the 1st coat, the 2nd coat should definitely cover any bare areas. Upon finish coat, Insta Arch® should appear to be completely coated-in and evenly feathered.
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Can Insta Arch® be used for exterior use?
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Yes. Insta Arch® can be used in the same manner for exterior use. Instead of joint compound being used to process the unit, a stucco finish is recommended for long lasting results. Follow the same installation instructions for an exterior finished archway.
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