Pipework: Notching and/or Drilling Joists vs over the top?

Section62

laurencewhymark said:

Alternatively, is it an idea to simply sit the pipes on top of the joists (sitting in talon clips)?

All of the above options raise the question of: how do I then insulate / lag the pipes?

You can get spacers which lift the clip (and pipe) away from the surface to make additional space for insulation -
https://www.toolstation.com/talon-spacer/p88191

Those ones are stackable, so you can use two or more as necessary to get the spacing you need.

Alternatively, as I do in places which aren't visible, make some plywood offcuts sawn into suitably-size blocks with a hole drilled through the centre, use them in the same way as the talon spacers.


These days there is no need to notch structural members, and it should be avoided if at all possible for domestic water applications.  Either fit the pipes above/below/around the member, or use plastic pipe threaded through holes drilled in the neutral axis of the member.

paperclap

Section62 said:

laurencewhymark said:

Alternatively, is it an idea to simply sit the pipes on top of the joists (sitting in talon clips)?

All of the above options raise the question of: how do I then insulate / lag the pipes?

You can get spacers which lift the clip (and pipe) away from the surface to make additional space for insulation -
https://www.toolstation.com/talon-spacer/p88191

Those ones are stackable, so you can use two or more as necessary to get the spacing you need.

Alternatively, as I do in places which aren't visible, make some plywood offcuts sawn into suitably-size blocks with a hole drilled through the centre, use them in the same way as the talon spacers.


These days there is no need to notch structural members, and it should be avoided if at all possible for domestic water applications.  Either fit the pipes above/below/around the member, or use plastic pipe threaded through holes drilled in the neutral axis of the member.

That's really handy, thank you!

Bendy_House

Liking Grumb's idea of larger pipe clips that'll go over continuous insulation.

LWM, if they will be crossing over the ceiling joists in the loft, you'll only need to secure them every second joist if even that. And the clips don't even have to be snug - they are just there to keep the pipes in place in case some klutz trips over them...