Flat Roof Covering Is Cement Tile

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

flat roof3.JPG

flat roof2.jpg

flat roof1.jpg

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.

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.

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:

Your answer is in RAS 120

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.

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.
For definitions of terms used in this application
standard, refer to ASTM 1079 and the
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:
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
    per Product Approval 3.01 B, C, D or E**

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

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

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

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.

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.

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?

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

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.

Not to mention they might blow off in s hurricane