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eLibrary >
21/30426217 DC BS 8000-6, Workmanship on construction sites – Part 6: Code of practice for slating and tiling of roofs and walls >
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21/30426217 DC BS 8000-6, Workmanship on construction sites – Part 6: Code of practice for slating and tiling of roofs and walls, 2021
- 30426217_Form 36.PDF
- 30426217_Text.pdf [Go to Page]
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Handling and preparation of materials [Go to Page]
- 4.1 Checking, handling and site storage of materials [Go to Page]
- 4.1.1 Checking
- 4.1.2 Handling
- 4.1.3 Storage (on ground)
- 4.1.4 Storage (on roof)
- 4.2 Preparation for work [Go to Page]
- 4.2.1 General
- 4.2.2 Working instructions
- 4.2.3 Liaison
- 4.2.4 Acceptability of the roof structure
- 4.2.5 Fire-breaks [Go to Page]
- 4.2.5.1 Roofs
- 4.2.5.2 Walls
- 4.2.6 Insulation
- 4.3 Mortar preparation
- 4.4 Application of mortar
- 5 Preparation, laying and fixing [Go to Page]
- 5.1 Roofing underlays [Go to Page]
- 5.1.1 General
- 5.1.2 Boarding and sarking
- 5.1.3 Eaves
- 5.1.4 Verge
- 5.1.5 Ridge [Go to Page]
- 5.1.5.1 Duopitch ridge
- 5.1.5.2 Monopitch ridge
- 5.1.5.3 Vented Ridges
- 5.1.6 Hip
- 5.1.7 Valley
- 5.1.8 Abutments [Go to Page]
- 5.1.8.1 Side/front abutment
- 5.1.8.2 Back abutment
- 5.1.8.3 Underlay penetrations
- 5.2 Battens and counterbattens [Go to Page]
- 5.2.1 General
- 5.2.2 Setting out
- 5.2.3 Fixing
- 5.2.4 Counterbattens [Go to Page]
- 5.2.4.1 Roof
- 5.2.4.2 Wall
- 5.3 Verge undercloak
- 6 Laying and fixing of clay and concrete roof tiles, fittings and accessories [Go to Page]
- 6.1 General
- 6.2 Single-lap tiles [Go to Page]
- 6.2.1 Variable gauge tiles
- 6.2.2 Fixed gauge tiles
- Single-lap tiles that have mitred laps or headlocks and are of fixed gauge normally have some shunt in both directions. Setting out of battens and tiles should be within the maximum recommended gauge and the minimum shunt dimensions. The shunt in the ... [Go to Page]
- 6.2.3.1 Variable gauge tiles
- 6.2.3.2 Fixed gauge tiles
- 6.2.4 Verges
- 6.2.5 Ridges [Go to Page]
- 6.2.5.1 Top edges
- 6.2.5.2 Ridge tiles
- 6.2.6 Hips [Go to Page]
- 6.2.6.2 Ridge/hip junctions
- 6.2.7 Valleys [Go to Page]
- 6.2.7.1 Sheet metal valleys
- 6.2.7.2 Preformed valley units
- 6.2.8 Valley/tile/ridge junctions
- 6.2.9 Abutments [Go to Page]
- 6.2.9.1 Top edges
- 6.2.9.2 Side abutment: cover flashing
- 6.2.9.3 Open secret gutters
- 6.2.9.4 Back gutters
- 6.2.9.5 Plastic, GRP and metal faced flashings and soakers
- 6.2.10 Vertical tiling
- 6.2.11 Roofing accessories
- 6.2.12 Lightning conductors
- 6.3 Double-lap (plain tiles) [Go to Page]
- 6.3.1 Roof and wall general
- 6.3.2 Eaves and bottom edges
- 6.3.3 Verges
- 6.3.4 Ridges [Go to Page]
- 6.3.4.1 Top edges
- 6.3.4.2 Ridge tiles
- 6.3.5 Hips [Go to Page]
- 6.3.5.1 Ridge tiles for hips
- 6.3.5.2 Purpose-made hip tiles
- 6.3.5.3 Mitred hips
- 6.3.5.4 Metal roll hips
- 6.3.5.5 Ridge/hip junctions
- 6.3.6 Valleys [Go to Page]
- 6.3.6.1 Valley tiles
- 6.3.6.2 Mitred valleys
- 6.3.6.3 Sheet metal valleys
- 6.3.6.4 Laced and swept valleys
- 6.3.6.5 Preformed valley units
- 6.3.7 Valley/tile/ridge junctions
- 6.3.8 Abutments [Go to Page]
- 6.3.8.1 Top edges
- 6.3.8.2 Side abutment: cover flashing/soakers
- 6.3.9 Vertical tiling [Go to Page]
- 6.3.9.1 Top edge
- 6.3.9.2 Bottom edge
- 6.3.9.3 Abutments
- 6.3.9.4 External and internal angles
- 6.3.9.5 Junctions with verges: Winchester cutting
- 6.3.9.6 Junction with verges: Soldier course
- 6.3.10 Roofing accessories
- 6.3.11 Lightning conductors
- 7 Laying and fixing of fibre cement slates, fittings and accessories [Go to Page]
- 7.1 General
- 7.2 Hook fixing
- 7.3 Eaves and bottom edges
- 7.4 Verges
- 7.5 Ridges and hips [Go to Page]
- 7.5.1 General
- 7.5.2 Top edges
- 7.5.3 Ridges and hips
- 7.6 Hips [Go to Page]
- 7.6.1 Mitred hips
- 7.6.2 Ridge/hip junctions
- 7.7 Valleys [Go to Page]
- 7.7.1 Sheet metal valleys
- 7.7.2 Mitred valleys
- 7.8 Valley/slate/ridge junctions
- 7.9 Abutments [Go to Page]
- 7.9.1 Top edges
- 7.9.2 Side abutments [Go to Page]
- 7.9.2.1 General
- NOTE Where it is not possible to use a cover flashing, slate or tile fillets may be used, provided precautions are taken to avoid the mortar from cracking at the side abutment face as a result of roof settlement or movement. 7.9.2.2 Side abutment: cov...
- 7.9.2.3 Side abutment: open and secret gutters
- 7.9.3 Back gutters
- An open back gutter of specified design should be constructed adjacent to the abutment (sheet metal work).7.10 Vertical slating [Go to Page]
- 7.10.1 Top edge
- 7.10.2 Bottom edge
- 7.10.3 Abutments
- 7.10.4 External and internal angles
- 7.10.5 Junctions with verges
- 7.11 Roofing accessories
- 7.12 Lightning conductors
- 8 Laying and fixing of natural slates, fittings and accessories [Go to Page]
- 8.1 General [Go to Page]
- 8.1.1 Single size (tally) slating [Go to Page]
- 8.1.1.1 Slates should be sorted into at least three groups of equal thickness. Slates which are badly shaped or otherwise unsuitable for laying should be rejected or reserved for special situations.
- 8.1.1.2 For centre nailing, slates should be holed to the specified gauge and distance from the side edges. For top or shoulder nailing, slates should be holed to the specified distance from the top edge. [Go to Page]
- 8.1.1.3 The size of slate, the head lap and hence the holing gauge should be selected to conform to BS 5534. These should be checked to ensure they provide adequate side lap.
- 8.1.1.4 Slates should be head or shoulder nailed provided their dead load will exceed the wind load or where the head nailing and head bedding is sufficient to resist the wind load. The adequacy of the uplift resistance and the nailing should be check...
- 8.1.1.5 The holes should be formed using a slate holing machine. Machines which use two hole punches should do so sequentially, as punching two holes simultaneously risks cracking the slates.
- 8.1.1.6 When holing with a slater’s pick hammer care should be taken to avoid excessive spalling.
- 8.1.1.7 Slates should be holed with the thicker end as the tail and from the underside to the topside as laid (from the bed to the back) to provide a small counter sink in the face of the slate. The diameter of the hole and the countersink should be s...
- 8.1.1.8 Slates of equal thickness should be laid in any one course, with the thicker slates in the lower courses grading down to the thinner slates in the upper course.
- 8.1.1.9 The slating should be set out to provide the required verge overhang without cutting where possible.
- 8.1.1.10 Slates should be laid with the perpendicular joints in straight lines to nominal half bond in horizontal courses with tails aligned.
- 8.1.1.11 Slates vary in width. The width should be checked and the slating set out for the average slate width and variation by leaving a suitable gap between the slates, usually less than 5 mm. These gaps should not exceed the limitations of side lap...
- 8.1.1.12 The gauge required for the specified headlap should not be exceeded. [Go to Page]
- 8.1.1.13 Slates should be laid with the dressed edge face up, except for close mitred hips where the raking cut of the hip slate should be dressed so that the dressed edge is down. Slates with a grain should be laid with the grain in the vertical dire...
- 8.1.1.14 All slates should be mechanically fixed in accordance with BS 5534.
- 8.1.1.15 Any fixings required for accessories should be placed in the ridge or roof plane.
- 8.1.1.16 Vent slates should be positioned exactly where they replace a slate. If this is not possible and it is necessary to cut adjacent slates, the specified head and side laps should be achieved.
- 8.1.1.17 Any damaged or missing slates should be replaced with a mechanical fixing. Adhesives should not be used.
- 8.1.1.18 Care should be taken when trafficking completed areas of slating.
- 8.1.2 Random (diminishing courses) slating
- 8.1.3 Hook fixing
- 8.2 Eaves and bottom edges
- 8.3 Verges
- 8.4 Ridges and top edges [Go to Page]
- 8.4.1 Metal roll ridge
- 8.4.2 Ridge tiles and stone ridges
- 8.4.3 Dry ridge systems
- 8.5 Hips [Go to Page]
- 8.5.1 Hip tiles
- 8.5.2 Mitred hips
- 8.5.3 Dry hip systems
- 8.5.4 Metal roll hips
- 8.5.5 Ridge/hip junctions
- 8.6 Valleys [Go to Page]
- 8.6.1 Sheet metal valleys
- 8.6.2 Mitred valleys
- 8.7 Valley /ridge junctions
- 8.8 Abutments [Go to Page]
- 8.8.1 Top edges
- 8.8.2 Side abutments: cover flashing/soakers
- 8.8.3 Side abutments, open and secret gutters
- 8.8.4 Back gutters
- 8.9 Vertical slating [Go to Page]
- 8.9.1 Top edges
- 8.9.2 Bottom edges
- 8.9.3 Abutments
- 8.9.4 External and internal angles
- 8.9.5 Junctions with verges
- 8.10 Roofing accessories
- 8.11 Lightning conductors
- 9 Roofing accessories
- 10 Lightning conductors
- 11 Solar roof systems
- 12 Safety and general precautions [Go to Page]
- 12.1 Precautions [Go to Page]
- 12.1.1 General
- 12.1.2 Repair
- 12.1.3 Re-covering
- 12.2 Health and safety [Go to Page]
- 12.2.1 Roofing work should be planned so that battens are used as footholds (albeit not at mid-span) so as to avoid walking directly on tiles and slates. However, when completing hips, valleys and ridges, battens might no longer be available as a foot...
- 12.2.2 Any roof or vertical work in slating or tiling should be assessed as fragile in terms of the potential risks associated with handling materials, accessing roofs and trafficking completed areas of work.
- 12.2.3 An adequate number of crawling boards, ladders, hooks, etc. should be used, supported and anchored to prevent slipping or tipping. Packing should be used between boards and tiles or slates to avoid damage.
- 12.2.4 A ladder should not be placed against a verge owing to the uneven line of support. Any ladder used to gain access to a roof gable should rest below the verge to assure proper support and should be blocked out to clear any verge overhangs.
- 12.2.5 Valley linings should be checked to ensure they are not damaged when they are used for temporary access to the roof.
- 12.2.6 Materials or tools should not be dragged over the roof or be dropped onto the roof.
- 12.2.7 Ladders used for access at eaves should not be allowed to rest against the gutter. They should be blocked out to clear the gutter and made secure.
- 12.3 Material cutting [Go to Page]
- 12.3.1 General
- 12.3.2 Roof details which are covered (hips/tiles/flashings)
- 12.3.3 Roof details which are not covered (valleys/mitred hips/external angles/perpendicular joints) [Go to Page]
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