Flashing to mansard roof
Fix continuous timber tilt batten at eaves to provide support for Code 4 lead cover flashing and eaves course of tiles.
Ensure that a clear ventilation path is maintained from eaves to ridge where insulation is positioned between the rafters.
Lap roof underlay over the lead welt and secure mansard underlay under tilt batten.
Dress cover flashing over the top course mansard tiles by minimum 150mm and extending 150 -200mm up the tilt batten.
Clip the bottom edge of the flashing in exposed locations.
Mansard roof with mansard tiles
Ensure that a clear ventilation path is maintained from eaves to ridge where insulation is positioned between the rafters.
Lap the roof underlay over the mansard underlay by minmum 150mm.
Establish the correct number of courses of mansard tiles to maintain minimum headlap of 65mm.
Vertical tiling junction with monopitch roof: VI
Provide continuous timber fascia located directly above top course vertical tiles.
Fix Code 4 lead cover flashing to fascia and cover with mono ridge tile.
Dress lead cover flashing over the top course tiles by minimum 100mm.
Install vent tiles spaced to provide the equivelant of 5000 sq mm per metre high level ventilation to the main roof space.
Vertical tiling junction with monopitch roof: V2
Vertical tiling junction with timber frame side
Cover the ends of the vertical tiling with a timber reveal. The size of the reveal will depend upon the exact position of the window frame relative to the face of the wallFix a vertical lead flashing approximately 200mm wide, turned into a rebate just behind the face of the tiles and terminated with a welt. Finish tiling against the reveal with a full tile and a tile and half in alternate courses.
The first counterbatten should be fixed approximately 20mm in from the end of the batten to prevent the end nail fixing from splitting the tile batten.
Vertical tiling to dormer side
To avoid tile cutting the distance from the face of the tile batten on the side of the dormer to the window frame should ideally be 290mm. Reducing this distance in increments of 82.5mm will minimise tile cutting to a half tile module. Handed external angles are fixed in alternate courses up the external corner. Cutting of these should be avoided.
Fix a vertical lead flashing, approximately 200mm wide, turned into a rebate just behind the face of the tiles and terminated with a welt.
Note: If counterbattens are used, these need only be minimum 6mm deep when fixed to timber framing.