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Unread 05-09-2011, 05:18 PM   #1
CSS
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Help me out here. subfloor drawings specs ?

Alright guys I've been looking and I just looked right over it or in the wrong place. I need a drawing, spec's, documentation about subfloor. Particular that you DO NOT want to install tile backer directly to sawn cut boards. That a layer of ply is REQUIRED. I have looked in asni and tcna book 2010 volume and have found notta. I am having trouble lately with competetors not installing ply and stating not needed "im just trying to upsell them" they say
im loosing out and so is the customer because they get 2 or 3 guys saying its no problem then I tell them they need to spend more money to ad ply first. I know one of you have something for me. Thanks either way.
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Unread 05-09-2011, 05:26 PM   #2
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Robo, the easiest way to deal with that argument is to invite the other side to show you where the manufacturer of the CBU approves its installation over a sawn board floor.

None do.

And the manufacturer's instructions always prevail over any other instructions or standards.

If the customer is still willing to accept the installation in clear conflict with the material manufacturer's instructions.............you lose. And will never win.
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Unread 05-09-2011, 05:26 PM   #3
Dave Gobis
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It is in ANSI A108.11 and the TCA method. If you need more APA has a tile section I could email you.

4.4 Subfloor
4.4.1 Place 19/32 in. (16 mm) or thicker plywood, with Exposure 1 or Exterior durability
classification and meeting the minimum requirements of local building codes and A108.01
Paragraph 3.4.1.2 — with the long dimension across the wood or steel joists spaced a maximum
16 inch (406 mm) on center. A ¼-inch (6 mm) bead of construction adhesive shall be applied to
the center of the top of the joists.
4.4.2 Position plywood and fasten to steel joists with screws as specified by steel joist
manufacturer. Locate screws not more than 6 inches (152 mm) on center along panel edges and
12 inches (305 mm) on center at intermediate supports.
4.4.3 Fasten to wood joists with 6 d ring shank nails located not more than 6 inches (152 mm) on
center along panel edges and 12 inches (305 mm) on center at intermediate supports.
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Unread 05-09-2011, 05:49 PM   #4
CSS
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Thanks to you both. I will use manufacture installation guides and use ansi code references also. I would be interested in the APA version also. I love my documentation. It makes it alot easier for the customer to accept things they can read not everyone want to take the word of a 40 year old kid whos method costs more than the other options.
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Unread 05-09-2011, 06:22 PM   #5
Levi the Tile Guy
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So Dave, do you know all the ANSI codes and numbers off the top of your head, or do you have to actually look them up?
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Unread 05-09-2011, 06:30 PM   #6
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He knows a few of'em, Levi.
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Unread 05-09-2011, 06:46 PM   #7
tileguynky
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Quote:
Levi said,
So Dave, do you know all the ANSI codes and numbers off the top of your head, or do you have to actually look them up?
I am going to guess that he knows the ones broken the most pretty well.
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