Hi
Im in the process of replacing some of my driveway with lawn. Ive cut away some of the Mono block which revealed about 100mm of sand (im assuming Building sand). I removed the sand and then dug out a further 200mm of compacted Hardcore. I now have a hole around 300mm deep the floor of which is compacted clay. My Plan was to fill it with 2 tonnes of topsoil a layer at a time to ensure its heeled in properly then screed over it with a layer of sharp sand to get it level, however my neighbour has just completed a similar project and his new lawn has sunk in places.
Is there a maximum depth of top soil that can be added?.
Ive heard 150mm of top soil is ideal for turf but im unsure what to put underneath this to fill the remaining depth.
I have a load of stones removed from an other area of the garden (red chips) and was considering adding a layer of these to a) get rid of them and b) hopefully help drainage? c) prevent the lawn from sinking?
Is this a crazy idea?
//www.diynot.com/network/alimoonwalker/albums/
Im in the process of replacing some of my driveway with lawn. Ive cut away some of the Mono block which revealed about 100mm of sand (im assuming Building sand). I removed the sand and then dug out a further 200mm of compacted Hardcore. I now have a hole around 300mm deep the floor of which is compacted clay. My Plan was to fill it with 2 tonnes of topsoil a layer at a time to ensure its heeled in properly then screed over it with a layer of sharp sand to get it level, however my neighbour has just completed a similar project and his new lawn has sunk in places.
Is there a maximum depth of top soil that can be added?.
Ive heard 150mm of top soil is ideal for turf but im unsure what to put underneath this to fill the remaining depth.
I have a load of stones removed from an other area of the garden (red chips) and was considering adding a layer of these to a) get rid of them and b) hopefully help drainage? c) prevent the lawn from sinking?
Is this a crazy idea?
//www.diynot.com/network/alimoonwalker/albums/
