copper pipes in floor screed & plaster

[jimmyjams]

i live in a lower ground floor (basement) flat which has solid concrete floors.

i'm having a new central heating system installed now and copper pipes have been laid in the floor and covered in screed, and some have been chased into walls and plastered over.

these pipes have been covered in the felt lagging. while looking something else up on here, i came across some posts where people have said that you should use plastic pipe or plastic covered copper pipe ideally when burying in screed, or they should be covered in denso tape. (does the same apply to plaster walls?)

of course, all the pipework has already been laid so it would be a nightmare to redo. the corgi reg. engineer is insisting the lagging is fine as it is what he always uses (he showed me some of it and it does have a plastic inner lining.)

i understand this probably hasn't been installed to current best practice. but i'm confused as to whether it will be ok or not? i assume if the copper fails due to the screed in 5 years time the engineer who fitted it and says its fine won't come back for free!

thanks everyone.

 

[gas4you]

I doubt he would honour any warranty on pipe work for more than 12 months.

CH pipe work is not covered by the same regulations pertaining to fitting in screed or walls. Many, many installers use the tubular haifelt to protect pipes in screed, but the best answer is to use plastic coated copper.

Plastic pipes should not really be set in screed without some form of protection either, otherwise they cannot move during heating a cooling.

Screed, or concrete can eat away at copper where it touches it over the years, it's the lime in it I think.

Personally I would not worry too much about it. It could be worse, he may not have bothered with anything on the pipes

 

[doitall]

the corgi reg. engineer is insisting the lagging is fine as it is what he always uses (he showed me some of it and it does have a plastic inner lining.)

i understand this probably hasn't been installed to current best practice. but i'm confused as to whether it will be ok or not? i assume if the copper fails due to the screed in 5 years time the engineer who fitted it and says its fine won't come back for free!

I would be very worried about it if the engineer is talking about a gas pipe.

 

[jimmyjams]

thanks for the replies.

it's just the hot/cold feeds in the screed and plaster, not gas pipes.