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kregler Junior Member
Joined: 06 Feb 2007 Posts: 25
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Posted: Tue Feb 06, 2007 10:53 am Post subject: Bay window advice |
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Hello all,
I've just had (last window in today actually) double glazing fitted to replace my old 1930s wooden windows on my double bay.
The walls underneath the windows are in a horrible state. They are crumbling and feel pretty cold and damp. I know part of this was due to the state of the old rotted windows but I now want to do justice to my nice new windows.
What is a typical make up of a bay window?
The upstairs wall is lined with a thin layer of polystyrene and the outside is tiled. What would be the best way to go about sorting it out?
Would it be possible to strip it back from the inside and put in a waterproof membrane, then install timbers to then plasterboard over for the inside finish? I'd like to have it insulated too as it feels like there is nothing much there!!
I'm no professional builder but I'm pretty handy at DIY.
Thanks for reading this far and I hope some of you guys can help with guidance and advice.
Regards,
Karl |
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ultimatehandyman Site Admin

Joined: 16 Jul 2005 Posts: 9740 Location: Darwen, Lancashire
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Posted: Tue Feb 06, 2007 11:58 am Post subject: |
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Hi Karl,
welcome to the forum.
Bays are normally cavity walls and so you will have bricks on th inside, then a gap and then bricks on the outside.
I had a similar problem to you once where the bricks had crumbled beneath the windows and the only thing to do was to replace them!
Engineering bricks are good for this as they do not absorb any moisture.
Once you have rebuilt the bay on the inside ( if it needs rebuilding, that is) you can then dryline it with some foam backed plasterboard. This will help to insulate the room.
You can direct bond the plasterboard-
http://www.ultimatehandyman.co.uk/PLASTER_BOARDING_DIREcT_BOND.htm
then skim it with finishing plaster-
http://www.ultimatehandyman.co.uk/PLASTER_SKIMMING.htm
If you are unsure about anything then please ask. _________________ DIY | DIY Video |
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kregler Junior Member
Joined: 06 Feb 2007 Posts: 25
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Posted: Tue Feb 06, 2007 12:24 pm Post subject: |
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Thnaks for your reply.
I've just had a quick peek at the downstairs one once they had taken the old window of. It looked fine...just some cosmetic work on the inside. It's the upstairs one i'm not too sure on. It's a lot thinner. Would that be a timber frame? |
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ultimatehandyman Site Admin

Joined: 16 Jul 2005 Posts: 9740 Location: Darwen, Lancashire
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Posted: Tue Feb 06, 2007 12:31 pm Post subject: |
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Yes the upstairs one could well be timber, I believe they do this to reduce the amount of weight on the downstairs bay.
Foam backed plasterboard is good at insulating and will probably be ideal for such situations, there are a couple of joiners that pop in here from time to time, they might have a better idea and so it's best to wait and see what they say. _________________ DIY | DIY Video |
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kregler Junior Member
Joined: 06 Feb 2007 Posts: 25
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Posted: Tue Feb 06, 2007 12:37 pm Post subject: |
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Excellent!
I've had a couple of days off while they install the windows so I've been using the time to finish the kitchen and search the internet for advise for the log list of jobs I have.
The Ultimate Handyman has been a great source for all sorts of queries.
Keep up the good work, the forums are fantastic!
(Not much advice on fireplaces though...yet!!) |
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tim'll fix it BANNED

Joined: 18 Jan 2006 Posts: 2137 Location: Leicestershire
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Posted: Tue Feb 06, 2007 1:19 pm Post subject: |
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a friend of mine has just rebuilt his upstairs bay window area, he put celotex in the gaps in the stud work _________________ Decking |
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