Flat Roof Covering Is Cement Tile

(Marc A. Goldenberg, Inspector Lic # HI1365 Mold Assessor Lic #) #1

Converted carport.
Flat Roof Covering Cement Tile.
Extremely little pitch if you use your imagination, basically flat.
Think this is AOK?
Thank You. :)

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(Shawn D. Staggs, CPI) #2

This came from HON (Home Owners Network) Can't find anything in the ICC or FBC

Roof Slope Restriction
1. Do not install tiles on roofs with a slope less than (<) 2 ½ /12.

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(Marc A. Goldenberg, Inspector Lic # HI1365 Mold Assessor Lic #) #3

THANKS Shawn.
I was thinking less than 2/12.
I was "rubbing my eyes" on this one.
It was permitted & finaled by the City of Ft Laud. in 2009.
I'm calling it, recommending further evaluation by a licensed contractor.

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(Shawn D. Staggs, CPI) #4

[quote="mgoldenberg, post:3, topic:94526"]

THANKS Shawn.
I was thinking less than 2/12.
I was "rubbing my eyes" on this one.
It was permitted & finaled by the City of Ft Laud. in 2009.
I'm calling it, recommending further evaluation by a licensed contractor.
[/QUOTE]

LOL, Permitting department inspector steps out of his truck, Takes two looks and Smiles. (looks good to me) on to the next one:shock:

Sometimes I wonder:roll:

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(William E. Siegel) #5

Your answer is in RAS 120

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(Marc A. Goldenberg, Inspector Lic # HI1365 Mold Assessor Lic #) #6

Hi Bill!
I see an underlayment 2:12 or greater.
I guess I'm missing the cement tile part.
Or perhaps I'm in the wrong file.
Sorry to be dopey about it.
You know I appreciate your time.
http://www.ecodes.biz/ecodes_support/free_resources/2010Florida/TestProtocols/PDFs/Roofing%20Application%20Standard%20No_120.pdf

**2010 FLORIDA BUILDING CODE — TEST PROTOCOLS HVHZ (RAS) 120.1
Scope
1.
This application standard covers the procedures
for installation of mortar or adhesive set roof tile

systems. This standard shall be used in conjunc

tion with the tile manufacturer’s Product Ap

proval and RAS 127.
Definitions
2.
For definitions of terms used in this application
standard, refer to ASTM 1079 and the
Florida
Building Code, Building.
NOTE #1: The following table provides the
contractor with the choices

available for underlayment sys

tems. These systems can only be
used on pitches designated in the
table below:
ROOFING APPLICATION STANDARD (RAS) No. 120
MORTAR AND ADHESIVE SET TILE APPLICATION
Roof Pitch Choice of Underlayment
Plastic or Compatible Roof
Cement at Nails Penetrating
Underlayment Reference
2:12 or greater
1. ASTM D 226 Type II

30 or ASTM D 2626

(#43) inorganic base nailed
to deck, min ASTM D
6380, Class M or WS, Type
II (#90) organic cap sheet
set in Type IV hot asphalt.
Required 3.01 A
2. Any product approved
underlayment system with
a mechanically fastened
base sheet, and cap sheet
set hot, cold, or self
adhered.
per Product Approval 3.01 B, C, D or E**

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(Marc A. Goldenberg, Inspector Lic # HI1365 Mold Assessor Lic #) #7

I see this on page #12

NOTE #14: Mortar or adhesive set tile shall be
[FONT=Arial]applied at inclines of 2:12 and greater
[/FONT]

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(William E. Siegel) #8

Note one gives you a table for underlayments and state 2/12 or greater

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(Kenton Shepard, CMI) #9

[quote="mgoldenberg, post:1, topic:94526"]

Converted carport.
Flat Roof Covering Cement Tile.
Extremely little pitch if you use your imagination, basically flat.
Think this is AOK?
Thank You. :)
[/QUOTE]

At that pitch the tile is considered decorative but it's OK if the underlayment is a waterproof type.

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(Bradley K. Toye, CMI) #10

[quote="kshepard, post:9, topic:94526"]

At that pitch the tile is considered decorative but it's OK if the underlayment is a waterproof type.
[/QUOTE]

I would have to agree as long as the flat roof has at least 1/4"/ft pitch and normal drainage holes are present at the eave. The tile is just considered to be ballast in this situation. Not a real good idea, but I don't see a huge problem with it. Unless of course the manufacture of the membrane and tile roofing prohibits it.

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(Marc A. Goldenberg, Inspector Lic # HI1365 Mold Assessor Lic #) #11

No drainage holes flat C tile not "S" tile.
It looks like there is no slope.
FBC states not allowed unless there is a minimum of 2:12.

This little 1700 sq ft home is on one of the Las Olas islands surrounded by massive rebuilds.
The price is a little over a million dollars (probably most of it is land).
If I were spending that kind of $$, I'd demolish it & do a rebuild like all the neighbors.

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(Bradley K. Toye, CMI) #12

You've never seen drain holes at the eave on flat tile? The RAS 120 protocol appears to be HVHZ specific. Is this roof in the HVHZ?

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(Marc A. Goldenberg, Inspector Lic # HI1365 Mold Assessor Lic #) #13

I've seen 'em but not on this one... uh oh.
It is within the HVHZ.

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(Gary D. Rowden) #14

I would call it out also, decorative or not, the tiles are most likely nailed to the decking and any water getting past the tiles is an invitation to leaks. I could not see how a manufacture would approve this low slope installation.

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(William E. Siegel) #15

Not to mention they might blow off in s hurricane

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