Our kitchen sticks out of the back of the left side of the house and is
quite small. As was our neighbour's.

outside
__________
| |
_____ | |
| | gap | |
| |_____| |
| | |
| | |
our house neighbour


The neighbours have had an pretty large extension so their kitchen spans
the whole of the boundary, so now there is a wall to the right of our house.

We've been thinking of having a conservatory built in the gap between,
but now thinking of knocking the kitchen out and extending across in a
similar way they have, albeit smaller.

So we are now wondering whether to build the lot in a conservatory style
and have a glass roof.

Any opinions on this, anyone done similar?

Or any opinions generally, thanks.

On Friday, 29 December 2017 18:40:29 UTC, R D S wrote:
Our kitchen sticks out of the back of the left side of the house and is
quite small. As was our neighbour's.

outside
__________
| |
_____ | |
| | gap | |
| |_____| |
| | |
| | |
our house neighbour


The neighbours have had an pretty large extension so their kitchen spans
the whole of the boundary, so now there is a wall to the right of our house.

We've been thinking of having a conservatory built in the gap between,
but now thinking of knocking the kitchen out and extending across in a
similar way they have, albeit smaller.

So we are now wondering whether to build the lot in a conservatory style
and have a glass roof.

Any opinions on this, anyone done similar?

Or any opinions generally, thanks.

How would you make the heat loss reasonable, triple glazing?


NT

On 29/12/17 19:26, wrote:

How would you make the heat loss reasonable, triple glazing?


The place is a howling draughty mess at the moment, it could only get
better.

On Friday, 29 December 2017 18:40:29 UTC, R D S wrote:
So we are now wondering whether to build the lot in a conservatory style
and have a glass roof.

If you want a 'conservatory' you will have to keep exterior style doors between it and the rest of the house.

If you want it to be part of the house (and a habitable room) it will have to comply with Building Regs.

Lantern lights are quite in vogue at the moment if you want (or need for thermal compliance) a solid roof but want to look at the sky.

Owain

The heat loss through a glazed roof will be horrendous even if double glazed if our old conservatory roof was anything to go by. We replaced it with a lightweight insulated roof and so far through the coldest parts of winter the temperature has stayed about 1C at most below the temperature of the lounge where the thermostat is situated this is despite a considerable amount of glazing remaining. If you feel you need some light coming through the roof then I would limit it to smaller roof lights.

Richard

On Friday, 29 December 2017 19:34:12 UTC, R D S wrote:
On 29/12/17 19:26, tabbypurr wrote:

How would you make the heat loss reasonable, triple glazing?


The place is a howling draughty mess at the moment, it could only get
better.

I have a feeling that means you have no idea, it will be boiling in summer & freeze in winter.


NT

Not only that, but it can be very hot in a kitchen in summer and a glass
roof? Well.

Have you asked the neighbours? Have they done this?

Also if you are on a slope often building out with a level floor as its part
of the same room can make the door to the outside have several steps as
well.
Brian

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On Friday, 29 December 2017 18:40:29 UTC, R D S wrote:
Our kitchen sticks out of the back of the left side of the house and is
quite small. As was our neighbour's.

outside
__________
| |
_____ | |
| | gap | |
| |_____| |
| | |
| | |
our house neighbour


The neighbours have had an pretty large extension so their kitchen spans
the whole of the boundary, so now there is a wall to the right of our
house.

We've been thinking of having a conservatory built in the gap between,
but now thinking of knocking the kitchen out and extending across in a
similar way they have, albeit smaller.

So we are now wondering whether to build the lot in a conservatory style
and have a glass roof.

Any opinions on this, anyone done similar?

Or any opinions generally, thanks.

How would you make the heat loss reasonable, triple glazing?


NT

On 30/12/17 01:19, Tricky Dicky wrote:
The heat loss through a glazed roof will be horrendous even if double glazed if our old conservatory roof was anything to go by. We replaced it with a lightweight insulated roof and so far through the coldest parts of winter the temperature has stayed about 1C at most below the temperature of the lounge where the thermostat is situated this is despite a considerable amount of glazing remaining. If you feel you need some light coming through the roof then I would limit it to smaller roof lights.

Richard


You can get to 0.6W/mK with this:

file:///home/tw/Downloads/Pilkington_energiKare_Triple_and_Pilkington_Insuli ght_Triple_High_WER_Scores.pdf

That's worse than the recommended for roofs. However, it equates, on a
15m2 room, to a loss of 189W if heated to 21C inside and freezing outside.

The recommended value is 0.15W/mK so the loss there would be: 47W

So a triple glazed glass roof is losing an extra 142W which is about 2p
per hour at 13p/kWhr electrical heating - ie bugger all.


It also fails to take into account solar gain (a positive) in winter.


I would say: talk to the BCO. They may allow it, or may allow it with
compensatory improvements elsewhere in the building.

On 30/12/17 10:27, Tim Watts wrote:
On 30/12/17 01:19, Tricky Dicky wrote:
The heat loss through a glazed roof will be horrendous even if double
glazed if our old conservatory roof was anything to go by. We replaced
it with a lightweight insulated roof and so far through the coldest
parts of winter the temperature has stayed about 1C at most below the
temperature of the lounge where the thermostat is situated this is
despite a considerable amount of glazing remaining. If you feel you
need some light coming through the roof then I would limit it to
smaller roof lights.

Richard


You can get to 0.6W/mK with this:

file:///home/tw/Downloads/Pilkington_energiKare_Triple_and_Pilkington_Insuli ght_Triple_High_WER_Scores.pdf


Sorry - that was Chrome's fault...

This should get the same PDF:

http://assetmanager-ws.pilkington.co...ef=10362&cd=cd

On Saturday, 30 December 2017 10:27:13 UTC, Tim Watts wrote:
On 30/12/17 01:19, Tricky Dicky wrote:
The heat loss through a glazed roof will be horrendous even if double glazed if our old conservatory roof was anything to go by. We replaced it with a lightweight insulated roof and so far through the coldest parts of winter the temperature has stayed about 1C at most below the temperature of the lounge where the thermostat is situated this is despite a considerable amount of glazing remaining. If you feel you need some light coming through the roof then I would limit it to smaller roof lights.

Richard


You can get to 0.6W/mK with this:

file:///home/tw/Downloads/Pilkington_energiKare_Triple_and_Pilkington_Insuli ght_Triple_High_WER_Scores.pdf

That's worse than the recommended for roofs. However, it equates, on a
15m2 room, to a loss of 189W if heated to 21C inside and freezing outside..

The recommended value is 0.15W/mK so the loss there would be: 47W

So a triple glazed glass roof is losing an extra 142W which is about 2p
per hour at 13p/kWhr electrical heating - ie bugger all.

2p an hour for half the year is an extra £87.60 per year, £876 per decade. Fit the insulation.

It also fails to take into account solar gain (a positive) in winter.

but not in summer

I would say: talk to the BCO. They may allow it, or may allow it with
compensatory improvements elsewhere in the building.

Quadruple glazing can be cheaper than triple if you can find a matching pair of chucked out dg units.


NT

On Fri, 29 Dec 2017 18:40:26 +0000, R D S wrote:

Our kitchen sticks out of the back of the left side of the house and is
quite small. As was our neighbour's.

outside
__________
| |
_____ | |
| | gap | |
| |_____| |
| | |
| | |
our house neighbour


The neighbours have had an pretty large extension so their kitchen spans
the whole of the boundary, so now there is a wall to the right of our
house.

We've been thinking of having a conservatory built in the gap between,
but now thinking of knocking the kitchen out and extending across in a
similar way they have, albeit smaller.

So we are now wondering whether to build the lot in a conservatory style
and have a glass roof.

Any opinions on this, anyone done similar?

Or any opinions generally, thanks.

If you have a glass roof you will need blinds in the summer. Assuming that
you can meet the thermal loss requirements of Building Regs.

We built out with a solid roof with three opening roof lights then had the
entire garden end as bifold doors. This gives plenty of light and much
better heat insulation. The only major thing that I would have done
differently would have been to fit powered openers for the roof lights.

All very well to say - "How much? I can do that with a pole!" but after a
while it gets to be a pain, and automatic closing when it rains is a big
bonus.

Channelling out all that new plaster to run in extra wires isn't that
attractive, and the power units would have to fit the existing roof lights
because their integration into the metal roof is a work of art which would
be expensive to repeat.

Anyway, best of luck.

Cheers


Dave R
--
AMD FX-6300 in GA-990X-Gaming SLI-CF running Windows 7 Pro x64

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On 30/12/17 03:39, wrote:
On Friday, 29 December 2017 19:34:12 UTC, R D S wrote:
On 29/12/17 19:26, tabbypurr wrote:

How would you make the heat loss reasonable, triple glazing?


The place is a howling draughty mess at the moment, it could only get
better.

I have a feeling that means you have no idea, it will be boiling in summer & freeze in winter.

You're not far off (isn't what you've stated the definition of a
conservatory?!).

We have a 5.5 x 4.5 m conservatory, double-glazed sides and roof; the
roof has heat-reflective glass. It's on the north side of our bungalow,
which means that from about mid-November to mid-January is the only time
the sun is not on it. In winter it is cold. Even 1.8kW of underfloor
heating will barely keep it above 10 deg C when the temp outside falls
below zero.

In summer, it is just the opposite. Full sun nearly all day. Even with
automatic vents, and all the side windows' fanlights open, it is too hot
to stay in there. Blinds help, but only on less-sunny days. Even if
blinds reflect the IR back, some heat will remain trapped under the
glass. The only way to keep it comfortably cool would be with blinds and
air conditioning (maybe a real use at last for solar panels? Highest
output to drive a 3 kW a/c unit exactly when it's needed!).

But really if it's hot enough to need all that expensive cooling, why
not just sit outside under a parasol in the cool breeze of a gentle wind
or a fan? Trouble is, you don't have that option with a kitchen if you
need to prepare food or cook in it.

--

Jeff

On 30/12/2017 16:09, Jeff Layman wrote:
On 30/12/17 03:39, wrote:
On Friday, 29 December 2017 19:34:12 UTC, R D SÂ* wrote:
On 29/12/17 19:26, tabbypurr wrote:

How would you make the heat loss reasonable, triple glazing?


The place is a howling draughty mess at the moment, it could only get
better.

I have a feeling that means you have no idea, it will be boiling in
summer & freeze in winter.

You're not far off (isn't what you've stated the definition of a
conservatory?!).

We have a 5.5 x 4.5 m conservatory, double-glazed sides and roof; the
roof has heat-reflective glass. It's on the north side of our bungalow,
which means that from about mid-November to mid-January is the only time
the sun is not on it. In winter it is cold. Even 1.8kW of underfloor
heating will barely keep it above 10 deg C when the temp outside falls
below zero.

In summer, it is just the opposite. Full sun nearly all day. Even with
automatic vents, and all the side windows' fanlights open, it is too hot
to stay in there. Blinds help, but only on less-sunny days. Even if
blinds reflect the IR back, some heat will remain trapped under the
glass. The only way to keep it comfortably cool would be with blinds and
air conditioning (maybe a real use at last for solar panels? Highest
output to drive a 3 kW a/c unit exactly when it's needed!).

But really if it's hot enough to need all that expensive cooling, why
not just sit outside under a parasol in the cool breeze of a gentle wind
or a fan? Trouble is, you don't have that option with a kitchen if you
need to prepare food or cook in it.


FWIW my daughter and SIL have just had a conventional single story
extension built to enlarge the original kitchen/diner and removed what
was once a good quality extension for exactly the same reason, that it
wasn't really useable either in hot or in cold weather in spite of being
double glazed, properly heated, nice blinds, opening vents etc. New
kitchen part has pitched roof with three electrically operated velux
type windows to provide light and ventilation. Whole arrangement is a
great improvement.

Off at a tangent, she advertised the conservatory on ebay as buyer
collect, originally had a buyer for a few hundred pounds but they
dropped out. Second buyer only paid £5 but it saved them £350 in
disposal costs.