Plaintile - General Specification


 

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Plain Tile panels roof pitches from 12° to 90°

Plain Tile lightweight roofing tiles, to be supplied by Britmet Tileform Ltd.
Each tile must be secured using four no. coloured, 2.6mm x 50mm galvanised fixing nails, driven through the downturned nose of the tile into the face of the battens, (for 0.9mm Plain Tile, a coloured TEX screw can be used - Part No: ASF2 - 00E55).

BATTENS
Treated tiling battens of approved quality (E.g. tanalised), of suitable section, (See the Plain Tile estimating chart) to be laid at 160mm centres, (for 0.45mm thick) or 158mm centres (for 0.9mm thick), except the eaves batten (see eaves section), and secured to the rafters using galvanised nails. Joints in the battens should be staggered and meet halfway across the top of the rafters, as standard code of practice.

Please note: It is the responsibility of the installer to ensure correct batten usage

UNDERLAY
Approved reinforced felt, BS747 (Type 1F) to be laid over rafters, lapped and secured to the rafters with galvanised clout nails and carried well into gutters. All to comply with current regulations.

ANGLE RIDGE FLASHING
Two tile battens to be fitted side by side on both sides of the ridge, using galvanised nails. An additional 50mm x 50mm batten to be secured on top of the rearmost of the two tile battens in a position to suit the fitting of the Plain Tile angle ridge.

If necessary, the top course of tiles to be cut and bent using a guillotine and bender (Available from Britmet Tileform Ltd). The rear edge of the tile is to be turned up to form a 25mm to 38mm upstand against the top tile batten. Each tile must be secured using four nails driven through the downturn as previously described.

The angle ridge flashing is to be fitted over the top batten and nailed through the downturn of the ridge into the tile upstand and face of the batten, using five nails on each side.

ANGLE RIDGE (VENTILATED) ROOF PITCHES FROM 10° TO 35°
Felt underlay to be cut back allowing a continuous 12.5mm air gap on either side of the centre line of the ridge.

If necesary, the top course of tiles to be cut and bent using a guillotine and bender (available from Britmet Tileform Ltd). Each tile to be secured using four fixing nails driven through the downturn nose of the tile into the battens. A batten, not exceeding 50mm x 50mm to be fitted on the universal vent piece (Supplied by Britmet Tileform Ltd) and secured through the tile into the battens on the underside, using 75mm galvanised nails.

The ridge flashing to be fitted over the batten and nailed through the downturn into the face of the batten using five nails on each side.

ANGLE HIP FLASHING
A 38mm x 38mm hip batten to be nailed to the tile battens on each side of the hip rafter, using galvanised nails.

Tiles to be cut and bent to form a 25mm - 35mm upstand against the hip battens, using a guillotine and bender (available from Britmet Tileform Ltd).

The hip flashing is to be fitted over the battens and nailed through the downturn, into the face of the battens using five nails on each side.

EAVES
The bottom course of tiles to be secured using four no. coloured, 2.6mm x 50mm galvanised fixing nails driven vertically through the tile, as near to the high point of the tile profile as possible and into the fascia board, or through the eaves batten placed approx. 20mm behind the fascia board if the Plain Tile eaves ventilation system is used. These nail heads to be sealed using the Plain Tile finishing kit.

The top of the fascia board or eaves vent, if used, to be in line with top of battens. Fit Lay Board or Tilting Fillet at the eaves if appropriate, to ensure any moisture on the underlay drains into gutter.

EAVES VENTILATION
Roof pitch above 15°
The top of the fascia board should fixed 23mm below the top face of the eaves batten allowing for the Plain Tile, 10mm eaves vent system.

Roof pitch below 15°
The top of the fascia board should be fixed 25mm below the top face of the eaves batten allowing for the Plain Tile, 25mm eaves vent system. Note: Where the insulation follows the roof slope, the Plain Tile ventilation tray should be installed between the rafters.

VALLEY
The valley should be formed from lead, moulded glass fibre or similar approved lining, supported on valley boards.

Tile battens should project over the valley to provide fixing for the tiles.

Plain Tile panels to be measured, cut and bent, using a guillotinea and bender (available from Britmet Tileform Ltd), allowing sufficient downturn into the valley.

BARGE BOARD COVER
The timber bardge board should project 25mm above the top of the tile battens. A 50mm x 50mm timber batten to run parallel to the fascia board. Plain Tile panels should be cut and bent up against the timber barge batten.

The Plain Tile scribed barge board cover to be secured using five fixing nails drive through the downturned edge into the barge board and five nails to be driven vertically into the barge batten (the heads of the vertically fixed nails to be sealed, using the Plain Tile finishing kit).

SIDE WALL FLASHING
Plain Tile scribed side-wall flashing to be secured using fixing nails, one driven vertically into each batten (these nail heads to be covered, using the Plain Tile finishing kit).

Plain Tile cover flashing to be dressed over the vertical section of the side wall flashing and be dressed into the brickwork.

Plain Tile INLINE AND SOIL VENT
To provide additional ventilation, the Plain Tile inline tile vents are available providing an airflow of 7,500mm2.

The tile underlay must be cut to allow the spigot of the tile vent to pass through. The Plain Tile panel vent is installed to provide full weather security. The tile vent is secured by overlapping an Plain Tile panel on either side and nailing through the nose of the tile, as previously described. Nails must not penetrate the vent tile.

The Plain Tile inline vent tile can also be used as a weather protected exit point for soil pipes or extractor fan ducts by means of a flexi hose and pipe adapter that connects the vent to 100mm stacts or duct work.

PLAIN TILE GAS FLUE RIDGE TERMINAL
Available to suit angle ridge. Type (R) adapter and extension piece supplied by others.

Please note: This information is to be used as a guide only. It assumes that the structure of the existing building is in accordance with the building practice.

At your request a custom specification can be written for your individual project. Please contact our technical department for assistance.

Bramble Brown

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Note: We can now offer Chic finish.
This is a smooth powder coated finish as an alternative to granulated and can be manufactured to suit any colour.

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