• Style & appearance
• Product data
• Design considerations
• Installation & Maintenance

Style & appearance

Photographs

Colour availability
Variation 1	Variation 2	Variation 3

Product data

Trafficking

• High volume pedestrian areas
• Town centres
• Shopping precincts, plazas
• Footways

Features and benefits

• Held in stock therefore reducing lead times unlike natural products
• The cost of StoneMaster is considerably less than Natural Yorkstone,
• Fixed slab sizes making it easier to produce specific patterns and designs.
• Up to 50% recycled content
• Charcon Urban Surface Protection pre-applied as standard.

Design Considerations

Standards

• StoneMaster flag paving products comply with the performance levels in European Standard BS EN 1339.
• StoneMaster block paving products comply with the performance levels in European Standard BS EN 1338.

Composition & manufacture

• The product mixes for Charcon’s StoneMaster range seek to utilise the most sustainable resources. The following materials have been selected to maximise resource productivity:
• China clay stent - A by-product of the china clay industry used as an aggregate instead of quarrying virgin materials.
• Water - Water used in the manufacturing process is recycled.

Performance

• Skid resistance - StoneMaster flag paving has been tested for slip resistance in accordance with BS EN 1339 and the potential for slip is 'low'.
• StoneMaster block paving has been tested for slip resistance in accordance with BS EN 1338 and the potential for slip is 'low'.
• For full details of slip resistance, please refer to Charcon Technical Services on 01335 372222.
• Strength - Concrete paving blocks meet the requirements of BS EN 1338.
• StoneMaster flag paving meets the requirements of BS EN 1339.

Specification clauses

• For further information, please refer to Charcon Technical Services on 01335 372222.

Installations and maintenance

Installation guidelines

Preparation

Sub-grade:

1. Clear top-soil: complete sub-grade drainage.
2. Excavate and back-fill soft spots: compact well throughout.
3. Protect sub-grade from adverse weather.
4. Lay geotextile fabric or capping layer (if specified/required).

Sub-base:

1. Prepare in accordance with Specification for Highway Works.
2. Lay and compact in layers to a close-textured finish.
3. Open-textured sub-bases may require a binding layer of finer material.

Laying
General principles:
Lay paving immediately on prepared bedding: do not leave bedding exposed to weather or overnight.
To avoid bedding layer damage and creep, lay paving units up slopes and/or away from edge restraints.
Stand on previously laid paving when placing next row.
Block and sett paving
Lay fine aggregate bedding course (to BS EN 12620 Gf85 0/4 mp) to a final compacted thickness of 50 mm (in accordance with BS 7533: Part 3).
This can be done by either:

1. Compacting 50 mm of fine aggregate and screeding a further 15-20 mm of loose fine aggregate. (A small trial area may be required to determine the actual surcharge). Note: this is the preferred method. If laying on a roadbase or previously paved area, recommended thicknesses are reduced to 30 mm followed by 9-14 mm.

Or:

1. 60-70 mm loose fine aggregate screeded to accept blocks. Note: 39-44 mm if laying on a roadbase or previously paved area.
2. Lay blocks hand tight (2-5 mm joints).
3. Bed blocks with vibrating plate compactor (2 or 3 passes typically required).
4. Brush-fill joints with fine dry sand (in accordance with BS 7533: Part 3).
5. Vibrate surface again to assist joint filling.

If necessary during early life, top-up joints with loose sand to within 1 mm of working face by brushing surface.

Stain Removal
Charcon’s USP self cleaning sealant is pre-applied as standard to protect against staining, surface contaminants, gum, moss and bird droppings.