WayToGo
Registered Users
Posts:23
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| 09/04/2008 5:35 PM |
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I had a contractor come by and give me a bid for 3 coat stucco.
He recommended using 30 lb felt black paper on the ICF walls.
Is anyone using 30 lb felt paper to wrap the ICF built exterior walls?
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Alton
Registered Users
Posts:314
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| 09/04/2008 6:26 PM |
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I can not answer the question of whether felt paper should be used on ICF, but according to building scientist Joe Lstiburek, when you do use felt with stucco, it is better to use two layers of 15# felt instead of one thicker layer. It appears that one layer of felt gets wet and wrinkles when the stucco is applied and bonds to the stucco while the other layer stays dry thus creating a space between that lends itself to being a drainage plane. He also says that felt works better than house wraps because the vapor permability changes as the wetness increases.
Now, can someone answer the question he asked? Since this is the political season, I re-directed the question to what I wanted to answer. |
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Alton C. Keown
Residential Designer and Construction Technology Consultant
Auburn, Alabama
334 329-0957 AT&T Cellular |
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FlaICF
Registered Users
Posts:168
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| 09/05/2008 9:40 AM |
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| Exterior applications vary. If lathe is fastened,use paperback. Stucco can go on foam with use of fiber in all coats a must. Use fibermesh rolled material in base and apply top coats. Never have considered paper only on foam. How would you apply and bond it? |
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billnaegeli
Registered Users
Posts:17
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| 09/08/2008 8:08 PM |
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no and that is ridiculous , your stucco guy may know how to stucco but he don't know nothing about ICF walls. just apply dryvit mesh(eifs) to the scratch coat..unless you are going to throw baseballs at it.
see ya! |
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WayToGo
Registered Users
Posts:23
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billnaegeli
Registered Users
Posts:17
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| 09/10/2008 10:53 AM |
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yeah you need to lose the felt idea---completely!!
Sto is an eifs system like synergy, parex, drvit etc, you need the heavier mesh for the "traffic area" usually 4 to 5 ft up the wall, thats usually where you will get impacts, then above that use the lighter mesh. also keep the grills away from the finish (foam melts haha-a customer of mine found that out the hard way, something new!) so you are getting two coats of grey and then the finish or 1 coat grey(scracth coat for stucco guys) and 1 coat of finish for a total of 2 coats? |
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WayToGo
Registered Users
Posts:23
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| 09/10/2008 1:45 PM |
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These are the plans for stucco:
17 guage wire mesh fastened with screws, and metal lath at doors, window and corners.
3 coat stucco. Scratch and brown coat with fiber mesh in concrete all wrapped up with STO finish.
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billnaegeli
Registered Users
Posts:17
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| 09/10/2008 4:08 PM |
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| sounds like a plan |
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Raider Bill
Registered Users
Posts:69
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| 09/12/2008 12:23 PM |
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Gray,
I'm getting confused here. It was my understanding that you could co direct to ICF with scratch coat using metal lathe and omit the paper, felt. am I wrong thinking this?
Doesn't or won't type S bond to the foam? |
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billnaegeli
Registered Users
Posts:17
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| 09/12/2008 1:53 PM |
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yes, loose the felt all together,forever! it is not necessary. type s bonds great to foam, actually any of the eifs systems will bond very nicely to ICF foam and there are some better systems than eifs out there as well...tecnocem....permacrete....multicoat, quite a few.
good luck bill |
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Raider Bill
Registered Users
Posts:69
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| 09/12/2008 2:36 PM |
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My idea is to rasp, wash/clean the blocks as they are yellowed, Screw the lath with windlock lath locs and 2" ss screws [already have both] then trowel the typs S [already bought] into the lath, butter up the cultured stone [already bought] and stick it on while the mud is wet. Sort of a one time shot.
Also considering screws place under the stone evry so many runs to hold it up while drying. |
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billnaegeli
Registered Users
Posts:17
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| 09/12/2008 8:22 PM |
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| that works, no need to put scratch coat on for lick-n-stick, unless you are going for a finish stucco coat, then you will need a scrach coat first then a finish coat,savvy? get it done(yo have all the material) |
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Jelly
Registered Users
Posts:274
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| 09/12/2008 9:29 PM |
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| Hang on, do you really need the metal lathe? Isn't the fiberglass mesh all you need? Or are you talking about using the lathe with real stucco and mesh with EIFS type stucco? |
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billnaegeli
Registered Users
Posts:17
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| 09/12/2008 9:55 PM |
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i use the mesh with stucco or eifs, the only time i use metal is if i know there is going to be possible impact traffic. the plastic mesh comes in a light and heavy mesh. you really don't need wire on icf at all, if its residential. you are using standard portland s mix for lick and stick, just rough up the icf with a rasp place some s on the wall then some on the stone and lay it up.
cheers my man |
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Raider Bill
Registered Users
Posts:69
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| 09/13/2008 5:33 PM |
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| I bought the type S 2 pallets and 1200 sqft of metal lathe that was left over from a job site I went by. figured it can't hurt. |
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WayToGo
Registered Users
Posts:23
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| 09/16/2008 7:14 PM |
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Yes, planning to clean off chalk type powder on all ICF exterior walls, window wrap doors and windows.
Then place jumbo tex on all gable ends that had 1/2 " OSB decked.
Then use heavy guage stucco wire on ICF and gable ends. Use metal lathe around windows and doors and areas needing extra lathe.
Then using cement with the fiber mesh strand for the concrete cement mixture on the scratch and brown coat. Using a primer on brown coat and then the finish coat. |
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