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Driveways & Paving

Mimimum depth of hardcore and tarmac required for residential drive

Anonymous user 14/03/2024 - 2.32 PM

I am currently in dispute with my builder who has laid our tarmac drive but doesn't seem to conform to the basic measurements I have seen on other websites. The hardcore is no more than 2 inches and the first layer of tarmac is about the same pending the final layer of about an inch to complete the job. Are these layers acceptable and reasonable? The drive has been layed on bare earth.

Are you a tradesperson and able to answer this question?

5 Answers

Anonymous user

150mm sub base 70mm of 20mm binder course 30mm wearing course we have 20 yrs expierience in the tarmac industry

Answered25 February 2016

Patios & Drives Turfcare

Rating: 5 out of 5

Ross On Wye

Excavation of 200 to 230mm followed laying a geotextile membrane. You should than have a minimum of 150mm type 1 laid and compacted in at least two layers of 75mm each. Then in your case a 50mm base layer of tarmac followed by a 25mm wearing course should be fine. 2 inches of base is no where near enough and if he thinks it is I would be telling where to go as quick as possible

Answered24 January 2014

R.Hughes Building and Conservation Ltd

Rating: 5 out of 5

Wellingborough

I don't do tarmacking but my thoughts are that any drive needs 150mm (6 inches) type 1 hardcore as a base! I use 100mm when I do paving so 50mm is nowhere near enough for a drive!!

Answered21 January 2014

G King

Rating: 4.9 out of 5

Stoke On Trent

shouldn't imagine it will look good for long as he goes galloping off into the sunset

Answered21 January 2014

Hickens Utility Services Limited

Rating: 4.6 out of 5

Dudley

150mm MOT Type 1 70mm of 20mm binder course 30mm wearing course we recommend 6mm SMA to reduce the scuffing affect of power steering we have 20 yrs expierience in the tarmac industry

Answered29 March 2017