RobShepp wrote:The tiles are part of the water shedding system of the roof,
When the product approval or the manufacturer's installation instructions specify hip and ridge tile (most do) then hip and ridge tiles ARE REQUIRED to be installed ... no matter how much the builder or roofer complains or tries to come up with reasons that they did not/do not install hip/ridge tiles.
If no hip/ridge tiles are specified by either the product approval or the manufacturer, then none are required.
Note, though, that ALL openings between tiles - the openings between hip and ridge tiles and the field tiles they are laying on, the ends of the top course of tiles against a wall, the sides of field tiles along a wall, the bottom ends of the tiles (bird stop, end closure, eave closure, starter strip, starter closure, and other names) - need to be sealed, typically those openings are sealed with mortar.
When no hip or ridge tile are installed, that opening between where the two planes meet is also required to be sealed, again, typically with mortar.
The tile is the water shedding covering, but the tile is not the waterproof covering (except for System 1 tile roof systems where the flashings are installed above the tile, in which case the tile is the waterproof covering and ANY cracked or broken tile is a "roof leak"). Except for System 1 tile roofs systems which are (theoretically) water-tight, the tile sheds about 90% or so of the water, the rest is presumed to drain under the tile, down the underlayment, and out the weep holes in the starter strip (or the bottom tile closure by any other name).
In addition to sealing ("closing" is a more accurate word than "sealing") ... closing the openings between the tiles to keep most of the water out, the tile underlayment *is not sunlight resistant* and *is not to be left exposed to sunlight* for extended periods - that it the other reason those openings are closed (typically with mortar).
If those openings are not closed, sunlight will deteriorate the tile underlayment in a few years (as little and 2-3 years and maybe as much as 5-6 years) and then you have roof leaks.
I had one a number of years ago, Integra?/Entegra? I think was the tile manufacturer, where the builder did not install hip and ridge tile, but the hip and ridge were mortared closed. The product approval specified how to install the tile and also stated that the installation had to meet the product approval *AND* the manufacturer's installation instructions (most products approvals specify meeting both, thus the most restrictive of the two must be met) - the product approval showed the installation of hip and ridge tile but stopped short of saying that it was required, the manufacturer's installation instructions stated that hip and ridge tile was required unless the hip and ridge were finished off in accordance with the manufacturer's installation instructions for no hip and ridge tile installations.
Except that the manufacturer never made any installation instructions for installation with no hip and ridge tile, thus there were no manufacturer's installation instructions for no hip and ridge tile installations, and, based on the wording of the product approval and the manufacturer's installation instructions ... hip and ridge tile was thus required.
I went several rounds with the builder and the tile manufacturer and the end result was that the manufacturer either had to provide installation instructions for no hip and ridge tile installations - or - the builder had to redo the hips and ridges with hip and ridge tiles.
The manufacturer refused to create installation instructions for no hip and ridge tile installations.
The builder and their roofer ended up redoing the hips and ridges with hip and ridge tiles as specified in the product approval and manufacturer's installation instructions.
Rob, which Boral tile is it? Some are not approved for installation in the HVHZ (Miami-Dade or Broward counties).