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WayToGo
Registered Users
Posts:23
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| 09/04/2008 5:38 PM |
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Is it really worth screwing all the wire mesh on ICF exterior wall prior to stucco process?
Can staples be used? pros and cons?
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Cattail Bill
Registered Users
Posts:246
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| 09/04/2008 10:24 PM |
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| Yes I believe that it is important, Most people realize in this industry that most efis product adhere very well to the foam. But why take a chance ad the insurance of a fastener. Windlock makes a nice fastener for this purpose that I have used on Tf systems, Logix, Nudura. The problem for me with staples is a perceived value and getting a gun that will shoot them in far enough to satisfy me. The last job we did was on a TF system and we hung cultured river rock on that one the lightest stone was 4lb and the heavest was 9lb. This was completed 3 years ago and there is still no cracks or slide downs. |
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WayToGo
Registered Users
Posts:23
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| 09/10/2008 1:47 PM |
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Will use screws, will check with wind lock on the washer fastners.
Will use staples on the gable ends portions where wood decking (wafer board) was used. |
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icfcontractor
Registered Users
Posts:237
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| 09/10/2008 8:11 PM |
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Waytogo,
Anytime you use real stucco you MUST have a mechanical connection to the substate below ie. plywood, osb, waferboard, or foam. The 30 lb felt has two functions a vapor barrier for the substate and a drain plain for the moisture and water that will accumulate behind the stucco. This happens because stucco is not 100% water proof. Staples will temporarily hold the tar paper in place but if you think they will permenantly hold 100s of pounds of stucco you a sorely mistaken. Since the space between the stucco and substrate are prone to water you must use a mechanical fastener that will stand up to water ie stainless, coated, galvainized, ect... Stainless is my only choice. You will also need to make sure you have weep holes in the bottom of the finish to allow drainage. If you have never done this before and you continue down the path you have described, you can expect to be stuccoing every year.
ICF Contractor |
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Chris Johnson
Registered Users
Posts:341
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| 09/10/2008 11:39 PM |
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A certain manufacturer was promoting to staple the mesh to the webs, I know of two instances where that manufacturer was additionally named as a defendent for the lawsuit that entailed.
Stick with the mechanical fasteners. Grabber makes a nice screw with a large head, it works great with diamond mesh on ICF.
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Chris Johnson - Pro ICF
Napa, CA
Come for the wine, Stay for the ICF work |
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WayToGo
Registered Users
Posts:23
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| 09/11/2008 10:02 AM |
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Plans include a galvanized or Phillups II paint coated phillups screw head, 2 inches in length.
Will be using the washers, aka lathe locks: http://www.wind-lock.com/public/icf/lath_lock.asp
My home has gable truss ends on the west and east side of home that was decked with 1/2 inch OSB board. Will be using 2 ply jumbo tex black paper as the substrate between the OSB and the Scratch coat.
The whole house will be wrapped with 17 guage wire mesh and metal lathe in window and doors, etc areas.
The stcratch and brown coat, the contractor will utilize a concrete mix with fiber strand mesh.
The brown coat will be primered prior to STO finish.
Is there any other items that might improve or any items missed?
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Jelly
Registered Users
Posts:274
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| 09/11/2008 10:44 AM |
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Posted By WayToGo on 09/11/2008 10:02 AM
The brown coat will be primered prior to STO finish.
What will it be primed with and why? STO is a polymer modified stucco isn't it?
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WayToGo
Registered Users
Posts:23
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| 09/11/2008 1:34 PM |
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Sto Hot Primer: Use for high alkeline surfaces like freshly applied stucco to minimize efflorescence and to improve color uniformity and coverage of finish textures. Also reduced water absorption of stucco. -stocorp.com
Was highly recommended by a coulpe of stucco contractor in my area - New Mexico. Going to primer the whole brown coat (2nd coat).
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