FRSA/TRI Model Tile Guidelines – August 2005
Hip and Ridge Installation Instructions Page 9 of 30
2) Adhesive-set Hip and Ridge Attachment System - This attachment system
consists of installing a wood or metal hip and ridge frame (or other structural
support) secured to the substrate according to the FRSA/TRI Concrete and Clay
Roof Tile Installation Manual or to the requirements of the HVHZ requirements of
the (FBC) Florida Building Code, or having a FBC product approval meeting the
requirements of the FBC, specifically rule 9B-72. The weather blocking
mechanism is either accomplished with mortar or with a FBC code-approved roof
tile adhesive or other FBC code-approved weather blocking material, designed and
tested specifically for roof tile weather blocking applications. The hip/ridge tiles are
attached to the structural support with a FBC approved adhesive according to the
adhesive manufacturers recommendations based on the FBC approved independent
laboratory testing or according to the requirements of the HVHZ requirements of
the FBC. For slopes over 7:12, additional securement at the hip may be necessary
to prevent tile movement until adhesive is cured.
3) Mortar-set Hip and Ridge Attachment System - This attachment system consists
of installing hip and ridge tiles into a bed of FBC approved mortar tested
specifically for hip and ridge tile applications and meet the requirements of the
(FBC) Florida Building Code, specifically rule 9B-72. The mortar is used as the
attachment and waterproofing mechanism. For slopes over 7:12, additional
securement at the hip may be necessary to prevent tile movement until mortar is
cured.
4.2 Field Cut Roof Tile Requirements
4.2.1 All field cut tiles (two tiles on each side of hip) and the top course of ridge must be
attached to the substrate with code-approved adhesive, code-approved mortar or
mechanical fasteners and adhesive. (See Drawings 1 and 2). In situations where the ridge
course of tile has been cut, the field cut tile and the full tile course below the cut tile must
be attached to the substrate as well. This requirement is designed to minimize any dynamic
movement of the field cut tiles, at the most stringent zones of the roof, which may occur
during a high wind event such as hurricanes. (See Drawings 3).
4.2.2 The minimum head lap when installing the hip and ridge tiles is 2”, as stated in the
FRSA/TRI manual. It may be necessary to increase the head lap to cover exposed hip/ridge
tile fastening holes or adhesive. Cover exposed fasteners with a UV resistant sealant.
4.3 Hip and Ridge/Field Tile System Limitations
4.3.1 There are three attachment methods for securing hip and ridge tile, mechanically attached,
adhesive attached, and Mortar attached. These methods can only be used on field tile
attachment systems as follows:
Mechanically Attached Hip and Ridge Tiles - Can be used on field tile attachment
Systems One, Two, Three and Four, as listed in the FRSA/TRI Manual.
Adhesive-set Hip and Ridge Tiles - Can be used on field tile attachment Systems One,
Two, Three and Four, as listed in the FRSA/TRI Manual.
Mortar-set Hip and Ridge Tiles - Can be used on field tile attachment Systems Three and
Four ‘B’ only, as listed in the FRSA/TRI Manual.