concrete conundrum

[deanomc]

Boiler on the other side of wall A. B will be a washing machine. C will be a rad. Orange dotted line is a partition wall. All brick/block walls will be dot dab. Concrete floor of extension is 75mm deep on top of insulation, the rest of the room is suspended timber. Best way to get a 15mm cold water pipe from A to B. and also get two 15mm feed and return pipes from A to C. Not to bothered about the utility room but I dont want any pipes showing in the living room (living room is located from where the photo was taken) Wood floor will run in direction of that timber you seen on the floor.


Open to suggestions.

Ideally I want to channel concrete with two straight runs but I know this can be a minefield with Regs.

 

[john999uk]

From a DIYer. As the roof timbers are not insulated yet can you not run the pipes over head? That way they can be hidden without channelling the concrete. Obviously as I am not a plumber I don't know the building regs. So sorry if this is a stupid suggestion.

 

[Scott_D]

Why are you cutting a Chanel if that's not the finished floor

 

[gmartine]

Assuming that window is going to be bricked up and the stud isn't up yet you could run pipe overhead but inside the partition and down to the floor which'll leave you with a bit of easy horizontal channeling on the inside block to the rad site.

 

[deanomc]

As the screed will only be 5mm deep.

 

[deanomc]

Why are you cutting a Chanel if that's not the finished floor

Hi Scott. The screed on top of the concrete will only be 5mm deep.

 

[gmartine]

Burying pipe isn't a big deal if it's the easiest solution for you, just a question of making sure the pipe is well insulated as well as protected from the concrete either by denso tape or use of pvc coated pipe or plastic channeling like say electrical trunking.

 

[Meady]

Are you sure it will only be 5mm that sounds to me like it will crack in no time

 

[deanomc]

Burying pipe isn't a big deal if it's the easiest solution for you, just a question of making sure the pipe is well insulated as well as protected from the concrete either by denso tape or use of pvc coated pipe or plastic channeling like say electrical trunking.

True. It would be much easier to bury the pipe but not sure it is very obvious on the picture but channeling will mean cutting through a bit of DPM on the concrete floor. ( The bit which is butted up against the red brick) I dont want to take the risk of creating a damp area years later. Think best best is to run it through the partition wall. Thanks guys.

 

[gmartine]

Are you sure it will only be 5mm that sounds to me like it will crack in no time

Some leveling compounds (latex) are good to as little as 1mm in depth.

 

[deanomc]

Some leveling compounds (latex) are good to as little as 1mm in depth.

excellent. I was initially looking at Mapei Topcem but noticed it needs to be at least 40mm deep. I'll look into laytex options. Cheers gmartin.

 

[gmartine]

True. It would be much easier to bury the pipe but not sure it is very obvious on the picture but channeling will mean cutting through a bit of DPM on the concrete floor. ( The bit which is butted up against the red brick) I dont want to take the risk of creating a damp area years later. Think best best is to run it through the partition wall. Thanks guys.

Fair enough, if you were to carefully cut the DPM to leave a big flap then dig past it to bury pipe you could just as easily repair it when back filled with say dpm jointing tape.