The house I'm moving into needs air vents adding under the conservatory to ventilated the suspended flooring in the ground floor. Can anyone give me an estimate of cost please? It'll obviously need the con floor lifting and replacing. Thanks!

--
For full context, visit https://www.homeownershub.com/uk-diy...t-3113680-.htm

On 23/04/2021 15:15, PaulJoe wrote:

The house I'm moving into needs air vents adding under the conservatory
to ventilated the suspended flooring in the ground floor. Can anyone
give me an estimate of cost please?

Well when I needed to add some under floor ventilation here is cost me
about £3 / air brick and probably 10 mins work each.

It'll obviously need the con floor
lifting and replacing. Thanks!

Why obviously? Normally air brick style vents are fitted from the outside.

Typically you would remove a brick, then mortar in a vent in its place.

Depending on the outside wall finish you may be able to take out a whole
brick with a brick removing chisel, or if rendered etc, just chop in the
perimeter with an angle grinder, and then use a chisel bit in a SDS to
knock out the waste.


--
Cheers,

John.

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On 23/04/2021 17:58, John Rumm wrote:
On 23/04/2021 15:15, PaulJoe wrote:

The house I'm moving into needs air vents adding under the conservatory
to ventilated the suspended flooring in the ground floor. Can anyone
give me an estimate of cost please?

Well when I needed to add some under floor ventilation here is cost me
about £3 / air brick and probably 10 mins work each.

It'll obviously need the con floor
lifting and replacing. Thanks!

Why obviously? Normally air brick style vents are fitted from the outside.

Typically you would remove a brick, then mortar in a vent in its place.

When we had extra air vents added to the house wall the polystyrene ball
insulation poured out when the brick was removed! The OP's conservatory
wall might have the same issue.

Depending on the outside wall finish you may be able to take out a whole
brick with a brick removing chisel, or if rendered etc, just chop in the
perimeter with an angle grinder, and then use a chisel bit in a SDS to
knock out the waste.

Assuming the wall is double thickness separated by a cavity, getting to
the inner brick to remove it isn't quite so easy (especially if the
cavity keeps filling up with polystyrene balls!). And no doubt Sod's Law
will be operating, so a central heating or water pipe will be just
behind that inner brick, preventing it from being pushed in.

--

Jeff

On 23/04/2021 18:27, Jeff Layman wrote:
On 23/04/2021 17:58, John Rumm wrote:
On 23/04/2021 15:15, PaulJoe wrote:

The house I'm moving into needs air vents adding under the conservatory
to ventilated the suspended flooring in the ground floor. Can anyone
give me an estimate of cost please?

Well when I needed to add some under floor ventilation here is cost me
about £3 / air brick and probably 10 mins work each.

It'll obviously need the con floor
lifting and replacing. Thanks!

Why obviously? Normally air brick style vents are fitted from the
outside.

Typically you would remove a brick, then mortar in a vent in its place.

When we had extra air vents added to the house wall the polystyrene ball
insulation poured out when the brick was removed! The OP's conservatory
wall might have the same issue.

It may also need some work where the conservatory meets the original
house to make sure there is an air flow across the whole conservatory
floor and still across the whole house floor.

The amount of work required may also depend on the height of the
conservatory's damp proof course above ground level and that of the
conservatory floor. A stepped air brick may be required.

Is it just need for ventilation to just prevent condensation or also for
dispersal of ground gases (Radon)?


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

On 23/04/2021 18:27, Jeff Layman wrote:
On 23/04/2021 17:58, John Rumm wrote:
On 23/04/2021 15:15, PaulJoe wrote:

The house I'm moving into needs air vents adding under the conservatory
to ventilated the suspended flooring in the ground floor. Can anyone
give me an estimate of cost please?

Well when I needed to add some under floor ventilation here is cost me
about £3 / air brick and probably 10 mins work each.

It'll obviously need the con floor
lifting and replacing. Thanks!

Why obviously? Normally air brick style vents are fitted from the
outside.

Typically you would remove a brick, then mortar in a vent in its place.

When we had extra air vents added to the house wall the polystyrene ball
insulation poured out when the brick was removed! The OP's conservatory
wall might have the same issue.

Depending on the outside wall finish you may be able to take out a whole
brick with a brick removing chisel, or if rendered etc, just chop in the
perimeter with an angle grinder, and then use a chisel bit in a SDS to
knock out the waste.

Assuming the wall is double thickness separated by a cavity, getting to
the inner brick to remove it isn't quite so easy (especially if the
cavity keeps filling up with polystyrene balls!). And no doubt Sod's Law
will be operating, so a central heating or water pipe will be just
behind that inner brick, preventing it from being pushed in.

You can get longer sleeved bricks for such constructions.

(Although you will need to cut in without losing the lose fill!)


--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

On 23/04/2021 17:58, John Rumm wrote:
On 23/04/2021 15:15, PaulJoe wrote:

The house I'm moving into needs air vents adding under the
conservatory to ventilated the suspended flooring in the ground floor.
Can anyone give me an estimate of cost please?

Well when I needed to add some under floor ventilation here is cost me
about £3 / air brick and probably 10 mins work each.

It'll obviously need the con floor lifting and replacing. Thanks!

Why obviously? Normally air brick style vents are fitted from the outside.

Typically you would remove a brick, then mortar in a vent in its place.

Depending on the outside wall finish you may be able to take out a whole
brick with a brick removing chisel, or if rendered etc, just chop in the
perimeter with an angle grinder, and then use a chisel bit in a SDS to
knock out the waste.

I assume that the house has a suspended floor and the conservatory
doesn't? If so, it is going to be a big job. it is going to require
cutting trenches through the conservatory floor, making openings through
the house wall, cutting out the conservatory wall to fit high to low
level air-vents and ducts running through the cavity, fitting ducts in
the trenches and then making good. Basically the arrangement that I
used, except that I did it while building the conservatory in the first
place.

On 24/04/2021 00:34, Steve Walker wrote:
On 23/04/2021 17:58, John Rumm wrote:
On 23/04/2021 15:15, PaulJoe wrote:

The house I'm moving into needs air vents adding under the
conservatory to ventilated the suspended flooring in the ground
floor. Can anyone give me an estimate of cost please?

Well when I needed to add some under floor ventilation here is cost me
about £3 / air brick and probably 10 mins work each.

It'll obviously need the con floor lifting and replacing. Thanks!

Why obviously? Normally air brick style vents are fitted from the
outside.

Typically you would remove a brick, then mortar in a vent in its place.

Depending on the outside wall finish you may be able to take out a
whole brick with a brick removing chisel, or if rendered etc, just
chop in the perimeter with an angle grinder, and then use a chisel bit
in a SDS to knock out the waste.

I assume that the house has a suspended floor and the conservatory
doesn't? If so, it is going to be a big job. it is going to require
cutting trenches through the conservatory floor, making openings through
the house wall, cutting out the conservatory wall to fit high to low
level air-vents and ducts running through the cavity, fitting ducts in
the trenches and then making good. Basically the arrangement that I
used, except that I did it while building the conservatory in the first
place.


Fair point, I may have misread the OP, and assumed it was the
conservatory floor itself that was suspended. But yup, solid floor
conservatory floor abutted to the house's suspended floor, blocking off
airflow to air bricks etc would be more of a PITA!

--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

John Rumm wrote:
On 24/04/2021 00:34, Steve Walker wrote:
On 23/04/2021 17:58, John Rumm wrote:
On 23/04/2021 15:15, PaulJoe wrote:

The house I'm moving into needs air vents adding under the
conservatory to ventilated the suspended flooring in the ground
floor. Can anyone give me an estimate of cost please?

Well when I needed to add some under floor ventilation here is cost me
about £3 / air brick and probably 10 mins work each.

It'll obviously need the con floor lifting and replacing. Thanks!

Why obviously? Normally air brick style vents are fitted from the
outside.

Typically you would remove a brick, then mortar in a vent in its place.

Depending on the outside wall finish you may be able to take out a
whole brick with a brick removing chisel, or if rendered etc, just
chop in the perimeter with an angle grinder, and then use a chisel bit
in a SDS to knock out the waste.

I assume that the house has a suspended floor and the conservatory
doesn't? If so, it is going to be a big job. it is going to require
cutting trenches through the conservatory floor, making openings through
the house wall, cutting out the conservatory wall to fit high to low
level air-vents and ducts running through the cavity, fitting ducts in
the trenches and then making good. Basically the arrangement that I
used, except that I did it while building the conservatory in the first
place.


Fair point, I may have misread the OP, and assumed it was the
conservatory floor itself that was suspended.

I dont think you misread. I dont think we were given enough info!

Tim

--
Please don't feed the trolls

On 24/04/2021 14:00, Tim+ wrote:
John Rumm wrote:
On 24/04/2021 00:34, Steve Walker wrote:
On 23/04/2021 17:58, John Rumm wrote:
On 23/04/2021 15:15, PaulJoe wrote:

The house I'm moving into needs air vents adding under the
conservatory to ventilated the suspended flooring in the ground
floor. Can anyone give me an estimate of cost please?

Well when I needed to add some under floor ventilation here is cost me
about £3 / air brick and probably 10 mins work each.

It'll obviously need the con floor lifting and replacing. Thanks!

Why obviously? Normally air brick style vents are fitted from the
outside.

Typically you would remove a brick, then mortar in a vent in its place.

Depending on the outside wall finish you may be able to take out a
whole brick with a brick removing chisel, or if rendered etc, just
chop in the perimeter with an angle grinder, and then use a chisel bit
in a SDS to knock out the waste.

I assume that the house has a suspended floor and the conservatory
doesn't? If so, it is going to be a big job. it is going to require
cutting trenches through the conservatory floor, making openings through
the house wall, cutting out the conservatory wall to fit high to low
level air-vents and ducts running through the cavity, fitting ducts in
the trenches and then making good. Basically the arrangement that I
used, except that I did it while building the conservatory in the first
place.


Fair point, I may have misread the OP, and assumed it was the
conservatory floor itself that was suspended.

I dont think you misread. I dont think we were given enough info!

Well it was a HoH post, so chances are the OP will not be able to find
it again and let us know :-)



--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/