Whats the most cost effective product when raising ground levels?

[Post and beam]

Hi Guys

Our site slopes down away from the lane towards our house by about 90cm over 8 metres. Each side is also about 8 metres wide.

So i have a wedge shape on either side of the central drive that i need to fill. Not certain if it needs to also be SUDs compliant.

Filling it 100%with topsoil will probably be more expensive than necessary.

If anyone has done similar how did you approach this please?

[Oz07]

How much do you need to fill? Have you dug out for your foundations yet? You can fill with whatever you dig out and cap with topsoil

[gravelrash]

local builders will probably be happy to fill your holes with rubble for free...Help with Suds as well.

[Post and beam]

5 hours ago, Oz07 said:

How much do you need to fill?

Each side is about 8 metres by 8 metres. Then the depth/height is 900mm tapering to zero, hence me saying a wedge shape.

[Post and beam]

5 hours ago, Oz07 said:

Have you dug out for your foundations yet?

House is built and occupied. Soil from the foundations is required elsewhere. 

[Oz07]

Well you're not going to fill that deep in topsoil. Either hardcore or some inert fill. Are you parking on it or is it just planting/garden? If you had a trustworthy grab driver who you knew they could lose some loads on your job. Wouldn't want any old rubbish though. 

[ProDave]

51 minutes ago, Post and beam said:

Each side is about 8 metres by 8 metres. Then the depth/height is 900mm tapering to zero, hence me saying a wedge shape.

8M by 8M by 0.45M is the volume you have to fill, so 28.8 M³ per side.

 

So you either scrape off the top soil, add the infill then replace top soil, or for less work put a lesser amount of infil then fresh topsoil on top.

[Post and beam]

1 hour ago, ProDave said:

8M by 8M by 0.45M is the volume you have to fill, so 28.8 M³ per side.

 

So you either scrape off the top soil, add the infill then replace top soil, or for less work put a lesser amount of infil then fresh topsoil on top.

So the question is, whats the cheapest SUDs compliant infill material?

[saveasteading]

3 hours ago, Post and beam said:

whats the cheapest SUDs compliant infill material?

Crushed concrete. It usually comes with soil and other people's demo junk in it, but in your case a bit of earth won't matter.

[FarmerN]

Surely depends on what you want to do with the land after, parking, patio, flower borders or what.

 Does it need drainage under before you fill, does the surface water get away OK after fill ?

 

Recycled aggregate of some sort, from crushed brick , to sand?

 

[Post and beam]

11 minutes ago, FarmerN said:

flower borders

Or just a bit of grass. it'll be either side of the central drive. I cannot remember if planning require it to be SUDs compliant. So until i get it confirmed i am working on it needing to be.

Sand would do the job unless there is a cheaper filler, hence my questions. Then a topping of topsoil.

[JohnMo]

Top soil by the lorry load is around £35 tonne, if you are doing garden just do top soil. Any other purposes recycled concrete etc. or similar to bulk fill then hardcore all compacted.

[JohnMo]

1 minute ago, Post and beam said:

Sand would do the job unless there is a cheaper filler,

Deep sand, doesn't give very good grass, as the nutrients and water just bleed away very quickly. 

[Post and beam]

1 hour ago, JohnMo said:

Deep sand, doesn't give very good grass

Agree, which is why i said a topping of topsoil. i plan for about 200 of topsoil over whatever i end up packing with.