Originally Posted by
Martin lehman
Those are not clay tiles, they're concrete.
First photo, the underlayment should overhang the rake edge 1" min.
The installation instruction manual is referring to this only for single layer underlayment systems, i.e., System One installations. I am 'assuming' that the installation shown is a System One because 'some' of the flashings are 'on top'.
In the first photo, if you can tell that the underlayment is not overhanging the rake, you've got better eyes than mine (and I must say, mine are not as good as they used to be).
The hip and ridges are not weatherblocked.
This is not referring to where one tile laps over another tile, "weather blocking" is where the spaces between the hip/ridge tile and the field tiles below are pointed up with mortar. When you lay the ridge tile down (for example), its straight edge rests on the profile of the tile below, and, with anything but smooth surfaced flat tile, there will be gaps and spaces between the field tile and the ridge tile (the same for field tile and hip ridge tile). THOSE gaps and spaces need to be "weather blocked", which is almost always done by pointing up with mortar.
This is what it states: "Openings at hips, ridges and head walls including chimneys, skylights, solar panels, and downslope horizontal abutments shall be fitted with weather blocking material to keep water on the surface of the field tile. Other methods approved by local building official will be allowed. See Technical Bulletin at
www.roottile.com. Wrapping of nailer board is optional except with the use of mortar." (I.e., as in 'mortar set' installations.)
Did you catch the "of nailer board"? How many time do you find that installed?
NOTE: The above is from the 2002 installation manual. (The 2004 instructions treats the last part above the same as the 2002 instructions.)
The 2004 installation manual does not show the 1" overhang over the rake. The "optional" drip edge at the eaves in 2002 are now not shown as "optional", they are just shown, and, in fact, in the installation instructions, it states "Drip edge metal shall be installed at the eave, over the sheathing" (for single ply systems, i.e., System One).
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On another note, the 2002 installation instructions state that those 'flashings on top of the tile' are to extend (to the side of the pipe being flashed) a minimum of 4" on flat tile and a minimum of 1" past the crown on profile tile, i.e., 1" over the top of the profile so the water drains down the other side of the profile tile, not back to the penetrating pipe.
In the 2004 installation instructions, the flashing is shown as covering a much larger area, the installation instructions state "Apply skirt flashing over last field tile cut previously installed extending under the course of the tile above the penetration. Insure flashing is of sufficient width to redirect the water away from the penetration". The drawing states "Make watertight seal between pipe and underlayment", which, of course, you should not be able to see.