Raising garden level

[oddballodd]

Hi All, after having tried all else to increase drainage in my garden (created new soakaway with land drains and all we got was a nice pond at the bottom of the garden !) I have decided to try raising the level by an inch or 2 by adding topsoil and reseeding the lawn.

Question is, is there a best process for adding new topsoil i.e should I dig the exisitng soil first or can I just lay the new topsoil on top of whatever is there ? I will be adding both screened topsoil and sand to try to encourage drainage.

All advice appreciated.

 

[Thermo]

rotovate it over first then cover with sandy loam, which is ideal for grass seeding. you can get it perfectly flat and its easy to work for seed/turf work.