Potholes in a gravel driveway mean the gravel is sitting on soil with no proper sub-base or membrane beneath it. Plex Group explains the causes and the permanent fix across Worcestershire and the Cotswolds.
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The most common failure we find on rural drives around Chipping Norton and Kingham is gravel tipped and raked directly over the ground. It looks fine for the first summer. Then traffic presses the stone down into the soil, the soil squeezes up between the stones, and within a year or two the gravel has effectively disappeared into the ground. Every wheel path becomes a soft line, every soft spot becomes a hollow, and every hollow becomes a pothole. A gravel surface is only ever as strong as what sits underneath it, and soil on its own carries nothing.
A gravel driveway needs a compacted sub-base of MOT Type 1, typically 100mm to 150mm deep for cars and deeper for anything heavier. The sub-base is what actually spreads the load of a vehicle into the ground. Some driveways have a token layer of hardcore, 30mm or 40mm scattered rather than compacted in layers, which breaks up under point loading from tyres. Once the sub-base punches through in one spot, water collects there, traffic works the edges loose, and the hole grows every time a wheel hits it.
A geotextile membrane between the soil and the stone does two jobs. It stops the sub-base and gravel migrating down into the ground, and it stops fine wet soil pumping up into the stone under traffic. Without it, the two layers slowly mix. The tell is mud appearing through the gravel in winter and the surface feeling progressively thinner even though no gravel has been lost over the edges. Once the layers have mixed, topping up achieves nothing, because the new stone sinks into the same contaminated base.
Ground conditions across our area decide how fast a badly built drive fails. On the clay soils of the Vale of Evesham and the low ground around Bourton-on-the-Water, the subgrade turns plastic in winter, so an unprotected base sinks fastest between November and March. Clay also holds water in every depression, and each freeze-thaw cycle expands that trapped water and lifts the surrounding stone, opening the hole further. On the limestone brash of the higher Cotswold wolds the ground drains freely, but the soil cover is thin and uneven, so an uncompacted base settles at different rates along the drive and potholes appear in strings along the wheel lines.
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We start with a full site assessment, digging trial holes to find out what is actually under the gravel and how deep any existing sub-base runs. In almost every case the lasting fix is to strip the surface, excavate to formation level, lay a geotextile membrane over the subgrade, then build up a compacted MOT Type 1 sub-base in layers before topping with fresh angular gravel at the correct depth. On long rural drives we add falls and cut in drainage where water has been ponding, because a dry base is what keeps the repair permanent. Where the driveway meets the road or the house we retain the gravel with proper edging so the surface cannot spread. Plex Group builds and repairs gravel driveways across Worcestershire, Gloucestershire, Oxfordshire, and Warwickshire.
Potholes in a gravel driveway are a foundation problem and they are entirely fixable once the base is built properly. Plex Group repairs and rebuilds gravel driveways across Worcestershire, Gloucestershire, and the Cotswolds. Get in touch to arrange an assessment.
Potholes in a gravel driveway mean the gravel is sitting on soil with no proper sub-base or membrane beneath it. Plex Group explains the causes and the permanent fix across Worcestershire and the Cotswolds.
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From the initial meeting to the final clear up Patrick and Luke were unfailingly polite and professional. Patrick’s quotation for the work was sensible with a detailed breakdown. The work was started on time and was kept to time. The resulting terracing exceeded expectations and the work area was left cleaner than when the team arrived. I cannot thank Patrick, Luke and Jake enough for all their work and would have no hesitation in recommending PLEX Group.
It has been a pleasure having Plex work with me on my garden project. Totally engaged, very communicative and prompt. Access to my property is difficult but they just worked around any problems with a refreshing 'can do' attitude. I would happily recommend Plex to anyone working on a garden project.
Fantastic work and would highly recommend. The team were professional, friendly, considerate, hard working and flexible to ensure the works met our needs and expectations. Really nice team to have on site and were respectful and kept it as tidy as they could. Very impressed with the work and looking to get them to come back to do a couple of other jobs for us in the future.
I am really happy with the work that Plex did. They came up with solutions to problems that arose quickly, efficiently and without any stress. They were friendly, professional, organised, efficient and had excellent communication.
We have recently had a new garage installed from the Plex team and we are thrilled with the finished product. Can't thank Patrick Luke and their team enough. Would highly recommend.
I would highly recommend Luke and Patrick and their team. They are all extremely polite and hard-working. They put up a new pergola in our back garden and tidied up the edges of the garden. An excellent job.
Patrick, Luke and their team have transformed our sloped garden giving us a lovley functional space. They removed a hedge sadly over run with brambles with a fence gaining us a couple more meters of garden too! Despite having a week of rain they did their best to clear up at the end of the job. We would highly recommend this professional team.
Luke and Patrick have completed two projects for us now. They are the most polite and professional people with a hardworking team of individuals. Nothing is too much trouble for them.
Luke and his team are really lovely and professional. Cannot recommend him enough.
Luke and the team are absolutely brilliant. A passion for what they do and personal but professional, so pleased to have found them!
Really pleased with the concrete base for my carport that was completed by the team , worked really hard in poor weather conditions . Great job would definitely recommend the team .
Our garden has never looked better - hard-working, thorough, and also great at getting in touch if there's a change to the schedule, etc. They have nursed our box hedging back to health. Before and and after photos are a bonus!
Competitive price wise even though the work carried out was to a very high standard. I was very pleased with the end result and impressed with the tidiness they left the garden after all the work was carried out. A very happy customer!
Very obliging and efficient we have worked out a schedule that suits us both.
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