I'm about to add some insulation to a suspended timber ground floor room
- PIR between the joists.

The room has a number of sockets with wiring that runs down the wall and
under the floor. I can lay the bulk of the wiring to joists, away from
the insulation. It's the vertical section that I'm not sure about. How
best to insulate around this short section of wiring?

--
Cheers, Rob

On 31/08/17 17:22, RJH wrote:
I'm about to add some insulation to a suspended timber ground floor room
- PIR between the joists.

The room has a number of sockets with wiring that runs down the wall and
under the floor. I can lay the bulk of the wiring to joists, away from
the insulation. It's the vertical section that I'm not sure about. How
best to insulate around this short section of wiring?


gun foam - shouldn't hurt the cable and a short insulated section makes
no real difference.

If you are worried, stick a split bog roll or something around the cable
and foam upto that, leaving a clear way for the cable.

On 31/08/2017 18:15, Tim Watts wrote:
On 31/08/17 17:22, RJH wrote:
I'm about to add some insulation to a suspended timber ground floor
room - PIR between the joists.

The room has a number of sockets with wiring that runs down the wall
and under the floor. I can lay the bulk of the wiring to joists, away
from the insulation. It's the vertical section that I'm not sure
about. How best to insulate around this short section of wiring?


gun foam - shouldn't hurt the cable and a short insulated section makes
no real difference.

If you are worried, stick a split bog roll or something around the cable
and foam upto that, leaving a clear way for the cable.


But FTAOD do not allow a route for a draught of cold air to come up from
under the floor behind the skirting board. At the very least plug the ends.

--
Robin
reply-to address is (intended to be) valid

On Thursday, 31 August 2017 18:16:05 UTC+1, Tim Watts wrote:
On 31/08/17 17:22, RJH wrote:
I'm about to add some insulation to a suspended timber ground floor room
- PIR between the joists.

The room has a number of sockets with wiring that runs down the wall and
under the floor. I can lay the bulk of the wiring to joists, away from
the insulation. It's the vertical section that I'm not sure about. How
best to insulate around this short section of wiring?


gun foam - shouldn't hurt the cable and a short insulated section makes
no real difference.

If you are worried, stick a split bog roll or something around the cable
and foam upto that, leaving a clear way for the cable.

Use fire rated, the white stuff can go off like a firework


NT

RJH wrote:
I'm about to add some insulation to a suspended timber ground floor room
- PIR between the joists.

The room has a number of sockets with wiring that runs down the wall and
under the floor. I can lay the bulk of the wiring to joists, away from
the insulation. It's the vertical section that I'm not sure about. How
best to insulate around this short section of wiring?

Some times insulation derates the current carrying capacity of the cable.

On 01/09/17 06:41, FMurtz wrote:
RJH wrote:
I'm about to add some insulation to a suspended timber ground floor room
- PIR between the joists.

The room has a number of sockets with wiring that runs down the wall and
under the floor. I can lay the bulk of the wiring to joists, away from
the insulation. It's the vertical section that I'm not sure about. How
best to insulate around this short section of wiring?

Some times insulation derates the current carrying capacity of the cable.

You don't usually worry about 100mm or less if the cable passes through it.

If the insulation is covering the cable, that's different, but it
doesn't sound like that's the case here?

On 31/08/2017 20:20, Robin wrote:
On 31/08/2017 18:15, Tim Watts wrote:
On 31/08/17 17:22, RJH wrote:
I'm about to add some insulation to a suspended timber ground floor
room - PIR between the joists.

The room has a number of sockets with wiring that runs down the wall
and under the floor. I can lay the bulk of the wiring to joists, away
from the insulation. It's the vertical section that I'm not sure
about. How best to insulate around this short section of wiring?


gun foam - shouldn't hurt the cable and a short insulated section
makes no real difference.

If you are worried, stick a split bog roll or something around the
cable and foam upto that, leaving a clear way for the cable.


But FTAOD do not allow a route for a draught of cold air to come up from
under the floor behind the skirting board.Â* At the very least plug the
ends.

I have just been working in a "super insulated" new build,

Super insulated my arse.

There was a draught at the back of every wall when I was fitting the
sockets on the dry lined walls.

--
Adam

On 01/09/2017 20:37, ARW wrote:
On 31/08/2017 20:20, Robin wrote:
On 31/08/2017 18:15, Tim Watts wrote:
On 31/08/17 17:22, RJH wrote:
I'm about to add some insulation to a suspended timber ground floor
room - PIR between the joists.

The room has a number of sockets with wiring that runs down the wall
and under the floor. I can lay the bulk of the wiring to joists,
away from the insulation. It's the vertical section that I'm not
sure about. How best to insulate around this short section of wiring?


gun foam - shouldn't hurt the cable and a short insulated section
makes no real difference.

If you are worried, stick a split bog roll or something around the
cable and foam upto that, leaving a clear way for the cable.


But FTAOD do not allow a route for a draught of cold air to come up
from under the floor behind the skirting board. At the very least
plug the ends.

I have just been working in a "super insulated" new build,

Super insulated my arse.

There was a draught at the back of every wall when I was fitting the
sockets on the dry lined walls.

Some Building Control departments test a house (or a small samples) for
leak rate. I guess these have never been checked?

On 01/09/2017 14:33, Tim Watts wrote:
On 01/09/17 06:41, FMurtz wrote:
RJH wrote:
I'm about to add some insulation to a suspended timber ground floor room
- PIR between the joists.

The room has a number of sockets with wiring that runs down the wall and
under the floor. I can lay the bulk of the wiring to joists, away from
the insulation. It's the vertical section that I'm not sure about. How
best to insulate around this short section of wiring?

Some times insulation derates the current carrying capacity of the cable.

You don't usually worry about 100mm or less if the cable passes through it.

If the insulation is covering the cable, that's different, but it
doesn't sound like that's the case here?

Yes, the insulation could cover the wiring - but only the 50mm that runs
down the wall.

I'll caulk the hole where the cable goes through the floor and fashion a
length of conduit for that 50mm.

--
Cheers, Rob

On 01/09/2017 20:37, ARW wrote:
On 31/08/2017 20:20, Robin wrote:
On 31/08/2017 18:15, Tim Watts wrote:
On 31/08/17 17:22, RJH wrote:
I'm about to add some insulation to a suspended timber ground floor
room - PIR between the joists.

The room has a number of sockets with wiring that runs down the wall
and under the floor. I can lay the bulk of the wiring to joists,
away from the insulation. It's the vertical section that I'm not
sure about. How best to insulate around this short section of wiring?


gun foam - shouldn't hurt the cable and a short insulated section
makes no real difference.

If you are worried, stick a split bog roll or something around the
cable and foam upto that, leaving a clear way for the cable.


But FTAOD do not allow a route for a draught of cold air to come up
from under the floor behind the skirting board.Â* At the very least
plug the ends.

I have just been working in a "super insulated" new build,

Super insulated my arse.

There was a draught at the back of every wall when I was fitting the
sockets on the dry lined walls.


I've noticed that in my once uninsulated old build. Remove a socket or
switch on a windy day and quite a gale blows through.

--
Cheers, Rob

On 01/09/17 20:37, ARW wrote:
On 31/08/2017 20:20, Robin wrote:
On 31/08/2017 18:15, Tim Watts wrote:
On 31/08/17 17:22, RJH wrote:
I'm about to add some insulation to a suspended timber ground floor
room - PIR between the joists.

The room has a number of sockets with wiring that runs down the wall
and under the floor. I can lay the bulk of the wiring to joists,
away from the insulation. It's the vertical section that I'm not
sure about. How best to insulate around this short section of wiring?


gun foam - shouldn't hurt the cable and a short insulated section
makes no real difference.

If you are worried, stick a split bog roll or something around the
cable and foam upto that, leaving a clear way for the cable.


But FTAOD do not allow a route for a draught of cold air to come up
from under the floor behind the skirting board. At the very least
plug the ends.

I have just been working in a "super insulated" new build,

Super insulated my arse.

There was a draught at the back of every wall when I was fitting the
sockets on the dry lined walls.

That house will be pressure tested. They will foam gun all those cracks.


--
The biggest threat to humanity comes from socialism, which has utterly
diverted our attention away from what really matters to our existential
survival, to indulging in navel gazing and faux moral investigations
into what the world ought to be, whilst we fail utterly to deal with
what it actually is.

On 02/09/2017 10:34, The Natural Philosopher wrote:

That house will be pressure tested. They will foam gun all those cracks.


I think that's only guaranteed if it's a stand-alone build. Last time I
looked the regs only required an air permeability test on three units of
a kind on an estate. And even if that test is done properly, by a truly
independent contractor, I don't see a few squirts of foam behind sockets
making good underlying problems such as missing vapour barriers.




--
Robin
reply-to address is (intended to be) valid

The Natural Philosopher wrote:

ARW wrote:

There was a draught at the back of every wall when I was fitting the
sockets on the dry lined walls.

That house will be pressure tested. They will foam gun all those cracks.

AIUI if it's an estate, the builders only need to pressure test a small
sample of the houses ... will they seal the others?

On 02/09/2017 13:55, Andy Burns wrote:
The Natural Philosopher wrote:

ARW wrote:

There was a draught at the back of every wall when I was fitting the
sockets on the dry lined walls.

That house will be pressure tested. They will foam gun all those cracks.

AIUI if it's an estate, the builders only need to pressure test a small
sample of the houses ... will they seal the others?

Or pay off the guy doing the pressure testing to give it a pass?

It happens.

--
Adam