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Can traditional portland based stucco be applied directly over foam icf construction using metal lath without a paper vapor barrier between the icf foam and the stucco mix? | |
Answers:
From: subcan
i have built an icf home and used acrylic stucco which costed a lot of money and was difficult when it came to window and door flanges, etc... on my next house i plan to use traditional stucco and have found through research that you can just attached the wire to the icf and then stucco as usual. i believe that this will be just as good and an excellent cost savings.
i have pasted info from a website with regards to this and the link below. hope this helps.
traditional stucco is ideal for concrete wall systems
the durability and versatility of traditional portland cement stucco provide a great finish for other concrete building systems including concrete panels, insulating concrete forms (icfs), and autoclaved aerated concrete. depending on the condition of the concrete surface, portland cement plaster may be directly bonded to the concrete or applied to metal lath attached to the wall.
when directly bonded to the concrete a dash bond coat or surface applied bonding agent is typically needed to enhance the bond between the plaster and the concrete. when concrete surfaces are extremely smooth or contaminated with excessive form oil metal lath is used as a plaster base. metal lath can be mechanically attached to concrete, icf, or to autoclaved aerated concrete walls to provide a base for durable, traditional three-coat portland cement plaster exterior.
concrete masonry provides an excellent base for direct application of portland cement plaster in 2 or 3 coats, consisting of base coat(s) and a finish coat. the use of open-textured concrete masonry units promotes mechanical keying between the plaster and base masonry wall. because plaster and concrete masonry undergo similar volume changes, they are inherently compatible.
here is the link for this website.
http://www.cement.org/homes/ch_bs_stucco.asp
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