How many layers of carboard to keep the weeds down?

Just wondering have cleared almost 33%(so much work oh) of my allotment and i have been laying cardboard(free ) down to stop the regrowth of weeds (mainly bindweed with some dock and other misc)

how many layers is enough to take me from now till april? i have a fair amount of worms working away so i have to factor that in. however it will also be winter for most of that time so they and the weeds shouldnt be to active, 5-6 layers maybe?

5-6 should be enough, i also wonder how much cardboard is to much? or is there no real limit?

just lay the cardboard down and leave it  you could put manure /compost over it and plant straight onto it in the spring aswell it will ust rot down where it is BUT it will not stop the bindweed it may slow  it down a little but nothing can stop it

i found that by covering the bindweek the roots start to grow on the surface i lfted the cover weekly to romove new groth/weeds and after a few months there was almost none i know it ill be back but hopefully in manageble portions

I did not intend the cardboard to permenantly stop the bind weed, only to stop weeds from growing during the winter, as it gets colder and they slow down, it would save me weeding and worrying about them until it starts to warm up, where i intend to dig out the rest of the roots i can find and then hoe the ground continually until they use up all their stores of energy and die a horrible death

ash

A couple of layers would do the trick - the second to cover any accidental gaps in the first.

I got a lot of cardboard one year by going round the village shops scrounging packaging.  They were glad to get rid of it.  The only problem I had was with the sticky tape which had held the boxes together.  It does not rot!

Gillie

I did the cardboard thing, and sheet mulch as I could afford it. It keeps the weeds at bay while you tackle a bit at a time. I didn't want to use weedkillers so I preferred the slower cardboard route. I found that a full thickness newspaper over the slow-to--die thuggish weeds helped and I put this under the cardboard, and that usually saw them off quite quick after that. I liked killing weeds this way as you get no vegetation left to have to get rid of, it's just all gone   

Cardboard makes temporary paths as well to keep your feet off your wet soil. It does all rot down within a season. Cardboards sheets right up against a row of plants is good I think  I prefer black sheet mulch as it's rough and slugs don't like it but it costs and cardboard is free

The black sheet mulch is very rough and slugs don't like it but cardboard is another matter 

I laid some sheet mulch over a weedy bed this morning as I don't have time to weed it. I made a start on it but keep getting rained off. It's a great big long stretch so covering it up will prevent it getting any worse til I can get round to completely weeding it. I don't do weedkiller   

I top up my cardboard as it gets worn out. There's usually some in every skip and I cadge it from the electricity shop. Makes good paths and keeps the soil from getting sad from too much foot fall