Changing Single Glazing to Double Glazing in Georgian Teak Windows

nulabert

Thinking about getting the single glazing in the georgian windows changed. Its a big job as there are lots of individual panels and the teak frames would probably need to be routered to recess the double glazing units.

Has anyone done this lately? Was it as costly as i think it will be?

Thanks

nulabert

I'm bumping this almost 12 months on.

Has anyone hired a company that will change single glazing in old teak windows to double glazing?

Poor Uncle Tom

The width of the glazing bars in the present windows may be a problem. Whether the existing glazing is fixed between the intermediate bars or whether the intermediate bars are cosmetic will have a bearing.
It might be an idea to get a couple of windos reps out to see the job, they could advise further.

gman2k

Are these sliding sash windows? If so, you are better off spending you money on fitting seals and filling gaps around the windows than on upgrading the glazing.

sinnerboy

+1

Also if your building is a Protected Structure or is within a Conservation Area you may face expensive Enforcement action if it is considered that you have altered the character of the building.

There are specialist companies who can upgrade the windows with seals and make repairs whilst preserving the visual character . It depends on the overall condition of the windows and what repairs are required. Being labour intensive and slow it is expensive. Typically €500+ per window .

nulabert

The windows are about 30 years old. There are 6 single panels in a sash frame that is fixed to the window frame. The wood is to narrow to remove each pane and replace with a double glazed unit. My plan is to get someone to replace the fixed sash with a new fixed sash panel with one glaze unit replacing all six glazed units and using the insert in the double glazing to give the effect.

So I need a carpenter to make the foxed sash to take the single double glazing panel and then get them put in.

nulabert

Thanks for the posts. I got a company in Derry to price it so I'll be going with that. Its elite glass with u-value of 1.1w/m2k. Almost 5 times better than single glazing!

braftery

nulabert wrote: »

Thanks for the posts. I got a company in Derry to price it so I'll be going with that. Its elite glass with u-value of 1.1w/m2k. Almost 5 times better than single glazing!

Hi there,

I am amazed that anybody can offer you a 1.1W/m2K double glazed package that will fit into an old Sash window.

In order to do this normally the minimum thickness of the glass package is 24mm (4mm-16Argon-4mm). Any packages thinner than this will have a higher U-Value (4mm-12Argon-4mm = 1.3W/m2K, etc, etc).

What size package are you getting fitted ? If you have traditional georgian sash I am guessing, a 16mm (4mm-Argon-4mm)package at the maximum .. which will have an approx 1.8W/m2K

see this link to give you an idea difference in in performance of different thickness packages.

http://www.skp.lt/media/dynamic/files/38/thermo2.pdf

I fully understand your wish to keep your Sash Windows, I owned and lived in a house with them for over 10 years and i decided not to change them despite the draughts and cold.

But I think changing the glass will be a waste of your money, better to save now and get new tradional sash windows (including weights etc) made when you can afford it.

There is at least one very good company (which I have no connection too !) .. PM me and I can pass on their details.

Good luck with your project whatever your decision

Radiotower

I know of a company in Cavan that made up Double Glazed units as follows:

4mm Pilkington clear
4mm Pilkington K
12mm argon filled
U-Value 1.5

They didn't fit them into the timber windows but a carpenter who specialises in it done it and it turned out pretty well.

I can get contact names for you if you are interested in getting a price

PIPPA09

Does anyone know someone in the Dublin area who would double glaze my teak windows ( currently single glazed) and also replace draught proof sealant which is badly worn. The timber in the windows had been well maintained over the years and is in perfect condition.
Any advice on spec of glass I should be putting it would be appreciated. Also if anyone had this work done in recent years - has the difference been good or marginal and also has it lasted.
THANKS

nulabert

PM Sent

BryanF

Nulabert, if your Georgian windows are of conservation value, maybe you should consider secondary glazing and just repair the existing windows.

If you are going with the Derry company, can you PM the specification as I'm sceptical of their U-values. It must be just the glass not the overall finished window (ie including frames). Braftery sounds about right with his assumptions.

Consider the surrounding areas of wall before making this purchase, current thinking recommends you overlap insulation with window frames, to reduce heat loss.

If you do get a good air-tight window unit installed, have a think about how your houses ventilation will work. ventilation was probably more than adequate with your existing wins, but may not be following new window install.

nulabert

Thanks Lads for yer posts.

The windows are Georgian style, that is lokts of small panes in each windows. The windows themselves are about 30 years old. Anyways, yes, ye are right about the U-Values. And I only spotted that on Monday when they arrived to do install a test window.

The glazing is 4mm 10mm air gap and 4mm elite coated glass giving a U-Value of 1.5. At 16mm air gap, they can get the 1.1w/m2

The door glazing is 4mm 6mm air gap and 4mm elite coated glass giving a U-Value of 2w/m2.

1.5w/m2 is not bad for an 18mm thick unit so I'm happy enough.

Its not cheap and changing the glazing will bring the U-Value of the whole house from 0.86 to 0.57. It will take approximately 17 years for payback:eek:

BryanF

nulabert wrote: »

Thanks Lads for yer posts.

The windows are Georgian style, that is lokts of small panes in each windows. The windows themselves are about 30 years old. Anyways, yes, ye are right about the U-Values. And I only spotted that on Monday when they arrived to do install a test window.

The glazing is 4mm 10mm air gap and 4mm elite coated glass giving a U-Value of 1.5. At 16mm air gap, they can get the 1.1w/m2

The door glazing is 4mm 6mm air gap and 4mm elite coated glass giving a U-Value of 2w/m2.

1.5w/m2 is not bad for an 18mm thick unit so I'm happy enough.

Its not cheap and changing the glazing will bring the U-Value of the whole house from 0.86 to 0.57. It will take approximately 17 years for payback:eek:

seems like you meet a great salesman, maybe you should get some independent advice

sinnerboy

Little diversion here if no one minds ...

Empire State reglaze

all 6,500 windows of the landmark will be remade. The new windows will be triple glazed

nulabert

seems like you meet a great salesman, maybe you should get some independent advice

Na, he didn't say anything about payback, i'm the one working that out. I suppose, its not just about payback, the removal of condensation on the single glazing will be a big benefit. In terms of payback, i'm sure the term will shorten as oil rises so not to bad!!

These lads did a great job, getting them back to do the rest of the house in the summer. Not to many at this type of work - I can see why!

Little diversion here if no one minds ...

I wonder if they'll be routering the frames :D:D. If they remake that pic of the lads siting on the beam it will now have them wearing harnesses, in a cage, with full PPE gear:)

dingdong1234567

Radiotower wrote: »

I know of a company in Cavan that made up Double Glazed units as follows:

4mm Pilkington clear
4mm Pilkington K
12mm argon filled
U-Value 1.5

They didn't fit them into the timber windows but a carpenter who specialises in it done it and it turned out pretty well.

I can get contact names for you if you are interested in getting a price

Did anyone get the name of the above? Have pm'd but no reply. if anyone has the contact details for either of the above please pm me. thanks.