On Thu, 13 Feb 2014 13:23:44 +0000, David.WE.Roberts wrote:


Very strong warnings against old carpet because of the chemicals which
leach out into the soil.

http://www.allotments4all.co.uk/smf/...?topic=75757.0

From that discussion:


I can see that synthetic fibre carpets or those with rubber underlay
would be an environmental problem but can't see that wool or sisal or coco
fibre carpets and matting would be of concern unless they've had an
industrial chemical sprayed on to protect them at the time of
manufacture.

With which I agree. As to disposing of it, wool/canvas/sisal have all
lived and will compost. Man-made fibres and artificial rubber backing
won't. So choose carefully