u/thehooperlooper

This is under the floor of my 100 year old house, the system was I think installed in mid/late 80s when the house extension was done. Could this be asbestos?

Hi all, could someone please help me understand my floor construction and dpc/dpm configuration? Is it standard, "good enough" for a property of this age?

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This is an extension built in 1987, we bought the house couple years ago and found a leak under the floor this year (copper pipe in screed). We're getting all the underfloor pipework replaced next month, and a new kitchen installed.

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In the meantime I'm trying to understand the floor construction and dpm/dpc layers to check if it is done right/good enough.

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Layers from top down (from my zero knowledge perspective)

50mm screed

Clear plastic sheet below screed - not attached to wall, not sure if just covers pipes or across the whole floor...

Pipe work

Dpc - dpc ends 115mm from wall

Solid floor, not sure concrete or hardcore?

??? No idea what's further below, but can see what appears to be another DPC outside, approx 200mm below the other visible one. Is there likely to be another dpm at this level??

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Two photos are attached, inside and outside view

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Other than the leaking pipe we haven't noticed any damp issues, but we've only been here a couple years. I just want to make sure what we have is "sound" before we go to the expense of putting a whole new kitchen in on top of it. We don't really have the money to dig out and replace the whole floor but I'd try to find a way if deemed absolutely necessary. Getting conflicting information from builders so keen to check the hive mind...

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Thank you!

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