I would like to determine the exact construction of our conservatory floor base i.e. whether or not it is insulated and, if so, how and to what extent..

To do this I figured I could simply drill an 8mm hole through the base and pass a small endoscope camera down in the hope that I would be able to observe each layer in passing - a small scale subterranean geological dig.

Does anyone see any issue with this approach? Do you think I would see each layer as envisaged? I am particularly mindful of the consequences of puncturing any damp proof membrane that might be present, what to fill the hole with afterwards sufficient to restore whatever properties its former materials provided etc.

Any advice gratefully received!

Mathew

Mathew Newton wrote:

I am particularly mindful of the consequences of puncturing any damp
proof membrane that might be present, what to fill the hole with
afterwards sufficient to restore whatever properties its former
materials provided etc.
I would pour a plug of liquid DPM (Wickes one is a mix of bitumen and
rubber) into the hole, but that's just because I have some left over and
have found it very good for slathering onto anything that needs to keep
water out, rather expensive to buy some just for an 8mm hole though.

On Friday, October 20, 2017 at 12:25:15 PM UTC+1, Andy Burns wrote:

I would pour a plug of liquid DPM (Wickes one is a mix of bitumen and
rubber) into the hole, but that's just because I have some left over and
have found it very good for slathering onto anything that needs to keep
water out, rather expensive to buy some just for an 8mm hole though.

Yes, I was thinking I could see what I've got lying around. Heated waxoyl perhaps?

Mathew Newton Wrote in message:
I would like to determine the exact construction of our conservatory floor base i.e. whether or not it is insulated and, if so, how and to what extent.

To do this I figured I could simply drill an 8mm hole through the base and pass a small endoscope camera down in the hope that I would be able to observe each layer in passing - a small scale subterranean geological dig.

Does anyone see any issue with this approach? Do you think I would see each layer as envisaged? I am particularly mindful of the consequences of puncturing any damp proof membrane that might be present, what to fill the hole with afterwards sufficient to restore whatever properties its former materials provided etc.

Any advice gratefully received!

Mathew


I'd be testing that a snug sounding 8mm hole will enable you to
deduce what is what & where with your endoscope...

--
Jim K


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On Friday, October 20, 2017 at 2:01:37 PM UTC+1, jim wrote:

I'd be testing that a snug sounding 8mm hole will enable you to
deduce what is what & where with your endoscope...

Some cursory experimentation has given me confidence it'll work as it's focal length is quite short and gives good clarity when inserted inside pipes etc. Of course, whether I'll be easily able to distinguish between the different layers in a dusty-walled hole I don't know.

Ground penetrating radar?
I see a lot of utility companies now use this before they dig holes!
Brian

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"Mathew Newton" wrote in message
...
I would like to determine the exact construction of our conservatory floor
base i.e. whether or not it is insulated and, if so, how and to what extent.

To do this I figured I could simply drill an 8mm hole through the base and
pass a small endoscope camera down in the hope that I would be able to
observe each layer in passing - a small scale subterranean geological dig.

Does anyone see any issue with this approach? Do you think I would see each
layer as envisaged? I am particularly mindful of the consequences of
puncturing any damp proof membrane that might be present, what to fill the
hole with afterwards sufficient to restore whatever properties its former
materials provided etc.

Any advice gratefully received!

Mathew

On Friday, 20 October 2017 16:38:00 UTC+1, Brian Gaff wrote:
Ground penetrating radar?

I like (love) the sound of that idea Brian but it doesn't seem particularly DIY! :smileyface

Mathew

Mathew Newton wrote:
I would like to determine the exact construction of our conservatory floor base i.e. whether or not it is insulated and, if so, how and to what extent.

To do this I figured I could simply drill an 8mm hole through the base and pass a small endoscope camera down in the hope that I would be able to observe each layer in passing - a small scale subterranean geological dig.

Does anyone see any issue with this approach? Do you think I would see each layer as envisaged? I am particularly mindful of the consequences of puncturing any damp proof membrane that might be present, what to fill the hole with afterwards sufficient to restore whatever properties its former materials provided etc.

Any advice gratefully received!

Mathew

Small core drill ? but you would probably still compromise the membrane.

On 20/10/2017 14:50, Mathew Newton wrote:
On Friday, October 20, 2017 at 2:01:37 PM UTC+1, jim wrote:

I'd be testing that a snug sounding 8mm hole will enable you to
deduce what is what & where with your endoscope...

Some cursory experimentation has given me confidence it'll work as it's focal length is quite short and gives good clarity when inserted inside pipes etc. Of course, whether I'll be easily able to distinguish between the different layers in a dusty-walled hole I don't know.


If drilling through insulation you will probably feel the 'give' as the
drill bit hits it and the drilling debris should contain foam particles
as well as cement dust. A short suck from a vacuum cleaner with the
hose tightly fitted over the hole will probably clear enough dust to
allow further investigation.

I have used a jet of water from a garden sprayer to clear debris from
holes - but mainly horizontally drilled holes.

--
mailto: news {at} admac {dot] myzen {dot} co {dot} uk

On Saturday, 21 October 2017 09:42:45 UTC+1, alan_m wrote:
On 20/10/2017 14:50, Mathew Newton wrote:
On Friday, October 20, 2017 at 2:01:37 PM UTC+1, jim wrote:

I'd be testing that a snug sounding 8mm hole will enable you to
deduce what is what & where with your endoscope...

Some cursory experimentation has given me confidence it'll work as it's focal length is quite short and gives good clarity when inserted inside pipes etc. Of course, whether I'll be easily able to distinguish between the different layers in a dusty-walled hole I don't know.


If drilling through insulation you will probably feel the 'give' as the
drill bit hits it and the drilling debris should contain foam particles
as well as cement dust. A short suck from a vacuum cleaner with the
hose tightly fitted over the hole will probably clear enough dust to
allow further investigation.

that won't clear anything

I have used a jet of water from a garden sprayer to clear debris from
holes - but mainly horizontally drilled holes.

that probably would.


NT

Chris Hogg Wrote in message:
On Sat, 21 Oct 2017 02:21:57 -0700 (PDT), wrote:

On Saturday, 21 October 2017 09:42:45 UTC+1, alan_m wrote:
On 20/10/2017 14:50, Mathew Newton wrote:
On Friday, October 20, 2017 at 2:01:37 PM UTC+1, jim wrote:

I'd be testing that a snug sounding 8mm hole will enable you to
deduce what is what & where with your endoscope...

Some cursory experimentation has given me confidence it'll work as it's focal length is quite short and gives good clarity when inserted inside pipes etc. Of course, whether I'll be easily able to distinguish between the different layers in a dusty-walled hole I don't know.


If drilling through insulation you will probably feel the 'give' as the
drill bit hits it and the drilling debris should contain foam particles
as well as cement dust. A short suck from a vacuum cleaner with the
hose tightly fitted over the hole will probably clear enough dust to
allow further investigation.

that won't clear anything

It's better if you only cover half the hole with the end of the vac
cleaner hose. That sucks in air through the open bit and the rush of
air stirs up the dust quite effectively.

Even better, one (or more, connected) drinking straws inserted to
near the bottom of said hole, the upper end kept away from the
vacuum nozzle. Seal the vacuum nozzle as best you can with
fingers aiming to allow air only/mainly to be sucked through the
straws & so flush the debris in the hole up into the
vacuum.
--
Jim K


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