How to Lay Tumbled Setts
How to Lay Tumbled Setts
These are general guidelines; different ground conditions may require tailored approaches. Always seek professional, site-specific advice to ensure optimal results.
Tumbled Yorkshire Stone Setts, with their rustic, weathered charm, are ideal for driveways, patios, and pedestrian areas. Follow these steps for a durable, professional installation using either rigid or flexible construction methods, depending on your project’s needs:
Plan and Prepare: Mark out the area using sand guidelines or spray paint, ensuring access for material delivery and spoil removal. Excavate to the required depth based on usage: (The chosen setts thickness + 35 to 50mm for the bedding layer and 75 to 100mm sub-base) for patios/paths, or (The chosen setts thickness + 25 to 40mm for the bedding layer and 150 to 225mm sub-base) for driveways. For vehicular areas, incorporate a slight camber for drainage. Remove weeds and treat the sub-grade with a weed treatment if needed.
Sub-Grade and Sub-Base: Clear organic material and excavate to a stable formation level. Fill soft spots with compacted DTp1 or crushed stone. For heavy-use areas (e.g., driveways), lay a 100–150mm sub-base of DTp1 or cement-bound material (CBM), compacted to within ±20mm of the desired profile. For light-use areas, a thinner sub-base (75–100mm) may suffice.
Base Course (Optional for Rigid): For rigid construction in high-traffic areas, lay a 100–150mm base of concrete (CBM3/4) or dense bitumen macadam (DBM), allowing 3–7 days curing for concrete. Ensure the base follows the pavement’s camber or flat profile.
Bedding Layer: For flexible construction, spread a 25–40mm layer of Class M/Zone 2 grit sand or 5mm hardstone grit, screed to a smooth, cambered or flat profile, and lightly compact. For rigid construction, use a 25–50mm lean-mix concrete (e.g., C7.5P) or 4:1 sand-cement mix, applied as a windrow bed for each sett. Optionally, apply a bond bridge slurry to the sett’s underside for better adhesion in rigid setups.
Laying Tumbled Setts: Place Tumbled Yorkshire Stone Setts by hand, using a taut string line for alignment and a rubber mallet to tap them into the bedding. Stagger joints for interlock and aesthetic appeal. Check levels frequently and stand back to ensure a consistent profile.
Cambering (if Needed): For vehicular areas, create a camber by profiling the sub-base and bedding layers. Use screed rails or a profiled screeding bar for flexible setups, or a camber template for rigid setups, ensuring a smooth, slightly raised centre.
Jointing and Consolidation: For flexible construction, fill joints with grit sand or fine gravel as you lay, then consolidate with a vibrating plate compactor. For rigid construction, partially fill joints to one-third depth with bedding mix, then point with cement or resin mortar, ensuring no residue stains the setts. Complete final jointing after confirming the surface profile.
Finishing: Clean the surface of any debris or mortar. For rigid setups, install movement joints every 3–5 meters for large areas. Add edge restraints (e.g., stone kerbs or setts laid lengthways) on a concrete bed for flexible setups to prevent lateral spread.
For bespoke Tumbled Yorkshire Stone Setts projects, our CAD and CNC technology ensures precision. Contact us to discuss your design or request a quote for standard or custom setts.
