Stone Veneer
CSI Division 04, Masonry
A thin layer of natural or manufactured, concrete-based, stone applied to a wall's exterior purely as a finish, attached with mechanical anchors, mortar, or an adhesive system depending on the stone type and substrate, distinct from full-thickness structural stone masonry.
Why it matters
Manufactured stone veneer is lightweight and far less expensive than natural stone, but it depends entirely on the water-resistive barrier and drainage plane behind it, since the veneer itself isn't waterproof, a detail that's easy to skip when an installer treats it as purely decorative.
On a real project
A builder installs manufactured stone veneer over a wood-framed wall, with a water-resistive barrier, metal lath, and a scratch coat installed first, so any water that gets behind the stone drains down and out rather than reaching the wood sheathing.
Who this matters most to
Where this goes wrong
An installer applies manufactured stone veneer directly over sheathing without the required water-resistive barrier and weep screed, treating it as a simple decorative finish. Water gets behind the stone during the first heavy rain season and rots the wood sheathing, discovered only when a section of the veneer wall starts sagging.
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