Lamina stucco?

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Author Message David G. Axt, CCS, CSI ,SCIP Senior Member Username: david_axt Post Number: 1885 Registered: 03-2002 Posted on Thursday, September 09, 2021 - 02:17 pm:    The architect wants me to specify "Lamina Stucco" on the playground side of the school building. He sent me a copy of the old drawings and they indicate "Lamina on Dryvit". What is Lamina? David G. Axt, CCS, CSI, SCIP Specifications Consultant Axt Consulting LLC Liz O'Sullivan Senior Member Username: liz_osullivan Post Number: 260 Registered: 10-2011 Posted on Thursday, September 09, 2021 - 02:33 pm:    I think the term lamina is only used when referring to EIFS. It's the part of the EIFS assembly outboard of the insulation. William C. Pegues Senior Member Username: wpegues Post Number: 992 Registered: 10-2002 Posted on Thursday, September 09, 2021 - 02:35 pm:    David, Typically it is simply one of the components of an EIFS system, see the drawing on this web site… https://www.wconline.com/articles/90079-the-continuation-of-continuous-insulation There is a note to the right of the illustration that says: “(Lamina) Fiberglass reinforcing mesh and polymer cement skim coast - refer to footnotes for skim coat and mesh criteria.” On other illustrations on the page it stats: “(Lamina) Fiberglass reinforcing mesh and Polymer cement skim coat (EIFS grade).” In the text further down the page it states “ EPS and Lamina Applied Over Stucco This assembly begins with a conventional three coat stucco application, sans finish. The stucco should be wet cured but does not need to be floated because the CI assembly is applied over the stucco. Notice I did not say an EIF system is applied? Even though foam, mesh and base coat, and acrylic finish are used, this is more of a thermal assembly of insulation and components to protect the insulation. There is no code requirement to use an EIF system. Think of it as an insulating layer sandwiched between a code compliant stucco assembly and a finish layer. Easy, my EIFS professionals, I mean no harm. This came about during the rough and tumble EIFS years when EIFS was taboo but foam and some protective layers weren’t—I shake my head as I type this. So in overview we have a stucco cladding with some foam and a lamina to cover the foam and an acrylic finish, CI stucco version two.” But - there is no knowing what the architect’s understanding/intention is. William C. Pegues, FCSI, CCS, SCIP ken hercenberg Senior Member Username: khercenberg Post Number: 1403 Registered: 12-2006 Posted on Thursday, September 09, 2021 - 03:27 pm:    Hi David. Perhaps the prudent request is whether an enhanced impact-resistant reinforcing is desired on the playground side of the building. I'm presuming the designer does not recognize the need for this at the other building elevations, especially at various entrances and exits where EIFS always gets destroyed as well. Curious if they bothered to let you know if the system is a water-drainage system or not. Lynn Javoroski FCSI CCS LEED® AP SCIP Affiliate Senior Member Username: lynn_javoroski Post Number: 2268 Registered: 07-2002 Posted on Thursday, September 09, 2021 - 03:34 pm:    Since "lamina" simply means "layer" - but why use a simple word when a "fancy" one looks like you know more - I'm thinking it just means "layer" (Unless it's a proprietary word used by a particular manufacturer)