Depends on how it is done. it may have to be replaced.
Did a little search and found out we have bought Microflex pipe (32mm duo) at about €31 p/m plus VAT. the fittings to connect them to normal 1" pipe are priced at about €25 plus vat. Very expensive considering you will have to pay upmark and labour to fit.
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Thanks for your reply. Might have to look into it because heating costs were apparantly running at €900 per month which is unreal for a 2000 sq ft timber frame house! I know underfloor heating is expensive but thats ridiculous. Getting the pipes redone might be cheaper in the long run?