SLATE 2000® SLATE PANELS Slate panels, for roof pitches from 12° to 90°. Britmet Slate 2000 1250mm x 369mm light weight roong slate panels have been designed to emulate natural slates and MUST be xed with a broken bond and xed right to left. Manufactured and supplied by Britmet Tileform Limited. To secure the 0.45mm Slate panels, 4no. coloured 2.6mm x 50mm galvanised xing nails per panel should be driven through the downturned face of the slate panel ensuring penetration through the batten is made. (For 0.9mm Slate, a coloured TEX Screw can be used: (Part No. ASF2 – 00E55). EAVES The bottom course of slate panels to be secured with four, coloured galvanised 2.6mm x 50mm nails driven vertically through the high point of the slate panel prole, into the fascia board, or through the eaves batten. Eaves batten to be placed approximately 20mm behind the fascia board if the Britmet eaves ventilation system is used. These nail heads to be sealed using the Britmet nishing 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 llet at the eaves, if appropriate, to ensure any moisture on the underlay drains into gutter. The second course of slate panels and each course thereafter, to be laid with a broken bond to conform with the interlocking design of the slate. EAVES VENTILATION The top of the fascia board to be set 15mm below the top face of the eaves batten for the 10mm eaves vent pack. Britmet over fascia ventilators to be xed to the fascia board and Britmet over insulation airow units to be installed between the rafters. BATTENS Slating battens of approved treated quality of suitable section, (see table one) to be laid at 369mm centres, except the eaves batten (see eaves), and secured to the rafters using galvanised nails, or 367mm centres for 0.9mm. Roof pitch below 15° The top of the fascia board should be xed 25mm below the top face of the eaves batten allowing for the Britmet 25mm eaves vent system. Joints in battens to meet half way across top face of rafters and be staggered as per standard code of practice. UNDERLAY Approved reinforced felt to BS747 (type 1F) to be laid over rafters and lapped in accordance with current regulations (see tables 2 & 3). Felt must be allowed to exceed into gutters and be secured to the rafters with galvanised clout nails. VALLEY Valley to be formed from metal sheet (lead) or moulded glass bre or similar approved lining, supported on valley boarding. Adjacent slate panels to be measured and cut, allowing sufcient downturn, as detailed in the manufacturers instructions. Battens to project over valley to provide xing for slate panels. ANGLE RIDGE To be manufactured and coated in identical material to main roof covering. BARGE BOARD COVER The timber barge board should project 25mm above the top of the slate battens. A 25mm x 38mm timber batten to run parallel to the fascia board. Slate 2000 panels should be cut and bent up against the timber barge batten. Two slate battens to be tted side by side on both sides of the ridge, using galvanised nails. An additional 38mm x 38mm ridge batten to be secured on top of the rearmost of the two slate battens in a position to suit the tting of the angle ridge. The Slate 2000 scribed barge board cover to be secured using ve xing nails driven through the downturned edge into the barge board and ve nails to be driven vertically into the barge batten (the heads of the vertically xed nails to be sealed, using slate 2000 nishing kit). The top course of slate panels to be bent and cut if necessary, using a bender and guillotine (available from Britmet Tileform Ltd). The back edge of the slate panel to be turned up to form a 25mm to 38mm upstand against the top slate batten. Each slate panel to be secured using four nails driven through the downturn nose of the slate panel into the battens. SIDEWALL FLASHING Britmet side-wall ashing to be secured with xing nails, one driven vertically into each batten (these nail heads to be covered, using Britmet nishing kit). Britmet cover ashing to be dressed over edge of side ashing abutting wall and let into brickwork. The ridge cap to be tted over the top batten and nailed through the downturn of the ridge cap into the slate panel upstand and face of the batten, using ve nails on each side. ANGLE HIP FLASHING A 38mm x 38mm batten to be nailed to the slate battens, on each side of the hip, using galvanised nails. Slate panels to be cut and bent up against the battens, using a guillotine and bender (available from Britmet Tileform Ltd). The hip caps to be tted over the battens and nailed through the downturn into the face of the battens, using ve nails on each side. ANGLE RIDGE (VENTILATED) – ROOF PITCHES FROM 12° TO 35° Felt underlay to be cut back at the top edge allowing a continuous 12.5mm air gap on either side of the centre line of the ridge. The top course of slate panels to be bent and cut if necessary, using a bender and guillotine (available from Britmet Tileform Ltd). Each slate panel to be secured using four xing nails driven through the downturn nose of the slate panel into the battens. A batten, not exceeding 38mm x 38mm to be tted on the universal vent ller (supplied by Britmet Tileform Ltd) and secured through the slate panel into the battens on the underside, using 75mm galvanised nails. The ridge caps to be tted over the batten and nailed through the downturn, into the face of the batten using ve nails on each side. SLATE 2000 INLINE SOIL AND INLINE SLATE VENT To provide additional ventilation, the Britmet inline slate vents are available providing an airow of 7,500mm2. The slate underlay must be cut to allow the spigot of the slate vent to pass through and 100mm above this penetration point, an opening protector (included with the slate vent) must be installed to provide full weather security. The slate vent is secured by overlapping a Britmet Slate panel on either side and nailing through the nose of the slate panel. Nails must not penetrate the vent slate. The Britmet inline vent slate can also be used as a weather protected exit point for soil pipes or extractor fan ducts by means of a separately available exi hose and pipe adapter that connects the vent to 100mm stacks or duct work. SLATE 2000 GAS FLUE RIDGE TERMINAL Available to suit angle ridge only. 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 specication can be written for your individual project. Please contact our technical department at the address shown below. Manufacturers of light weight roong systems Britmet Tileform Ltd, Spital Farm Ofces, Thorpe Mead, Banbury, Oxon. OX16 4RZ Tel: 01295 250998 Fax: 01295 271068 Email: [email protected] www.Britmet.co.uk BRITMET TILEFORM LIMITED