Afternoon everyone....

I've spent the last two days digging up my garden to get rid of the enormous amount of weeds and rocks which i've now pretty much done. My initial intention was to sow grass seeds to grow my lawn back but i don't think this is an option due to the state the garden is in. I was wondering if there was a membrane that could be used so i could lay this out and then put the turf on top? I've had a look at a couple of web-sites that only seem to sell membranes suitable for flower beds, shrubberies etc etc.
Has anyone any ideas?
Thanks
Jim