epoxy coatings and pipe liners to seal and restore your copper pipes while they are still inside your concrete slab

[dolmanster]

Hello, we are looking to buy a 1970s built bungalow. The neighbour not our semi detached neighbour, an ex plumber, advised he had removed the boiler to the loft and replaced all the central heating pipes as originally they were copper pipes under (within?) the concrete flooring.
A neighbour the other semi detached side agreed they can feel the warmth on their corridor floor when the
weather is cold and they have central heating on.
The boiler in the bungalow we hope to buy is a Vokera condensing boiler. We had hoped to change to a more efficient combi boiler.
We're looking at way to sort this, most cost effective and perhaps least buggerment involved in having to live in the camper van until we can inhabit!!

We can drain off and just cut off all the existing supply to radiator etc. and install new appropriate plastic pipes down the internal stud walls - something like that says 'im indoors who is a structural engineer.
I've read about a system called "no dig" where epoxy coatings and pipe liners are used to to seal and restore copper pipes while they are still inside your concrete slab. Does anyone have any helpful advice please?
We're not clear that the copper pipes have or are being damaged by chemicals in the concrete, or how they were protected when originally built.

 

[Mottie]

We're not clear that the copper pipes have or are being damaged by chemicals in the concrete, or how they were protected when originally built.

Is it leaking at the moment making it uninhabitable? If not, worry about it when you're in and if it leaks. You could always expose a small section of the piping to check them.

 

[oldbutnotdead]

How old is the existing boiler? If it is a condensing type already (and radiators have been sized so it heats the place effectively at condensing temperatures) then your efficiency gains from a replacement boiler will be minimal.
Combi- check the cold water pressure and supply rate are adequate.
Pipework- never heard of lining copper internally, i'll guarantee its an expensive process. Renewing internal pipework in a bungalow - easiest is usually to have the trunk (22mm) pipework in the loft and drop to radiators. If you have convenient stud walls then yes drops can go in the walls, if not then box them in a corner or drop them in a corridor. Or (depending on how well insulated the place is) consider internally insulating the external walls- will give you space to hide pipes there.

 

[dilalio]

Lining pipes in screed!

New one on me.

Wonder what cost and guarantee is like?

 

[dilalio]

Just done a search.

Only hit was Nuflo for this process.

They're in the USA and it's drains and water lines (aka mains)

Didn't read further to see if it does heating pipes but I doubt it's a domestic solution!

About Us

Meet our team Established in 2012, Nu Flow Midwest is the Chicago area’s exclusive installer of Nu Flow’s epoxy pipe lining technology. Cured in place epoxy pipe lining is an effective procedure that restores leaking, corroded or eroded pipes

www.nuflowmidwest.com

 

[Hugh Jaleak]

Cannot see 15mm pipe being lined, by the time any liner had been pulled/blown through the pipe and then cured, the useable cross sectional area of the pipe would probably have been halved.