Bifold Doors near corner of bungalow - Scotland

[better1191]

Hi,

Looking to fit bifold doors in to a conservatory as close to the corner of our house - similar to the thread here:

What width of wall is needed each side of bifold doors?

Hi Starting a one storey kitchen extension soon and we only have a width of 380cms internal room width. Anyone know how much of this back wall we can use for bifold doors? Have looked for a minimum wall width either side but can seem to find a standard requirement! Thanks for any help you...

www.diynot.com

Does the 665mm minimum distance from the corner apply in Scotland and if not can anyone point me in the direction of the relevant part of the regs? Doors will be around 3400mm width. It's a bungalow so only ceiling joists and roof timbers above.

Thanks.

 

[jono_h]

I’ve just had a look through section 1 of the Scottish Techical Handbook but it has very few references to absolute figures or dimensions, instead referring to a series of British Standards - and I’m not trawling through them!

The 665mm minimum is only that in as such as most BCO’s would accept that as being ‘safe’. If you want less than that and a SE proves it’s ok then you can build what you want. There’s all sorts of modern designs which have picture windows directly in the corner of a building.

 

[noseall]

It's a bungalow so only ceiling joists and roof timbers above.

Having masonry above is not always a disadvantage - structurally. Reduction of return jambs is often not structurally problematic. But when it does need beefing up, it can be a right ball ache. Think wind posts, lots of digging, foundations, steel fabrication, heavy lifting, drilling etc...

200kg.jpg

• noseall
• 14 Aug 2023

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• noseall
• 15 Aug 2023

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• noseall
• 15 Aug 2023

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• noseall
• 15 Aug 2023

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• noseall
• 20 Oct 2023

Note the (grey) wind posts tucked into the internal blockwork reveals/jambs.

 

[freddiemercurystwin]

Hmm, proportions on that are wrong for me, goping by the coursing 2.1m doors, 2.4ish ceiling, 250 floor and 150 upstand I guess but not a great look.

 

[Notch7]

Does the 665mm minimum distance from the corner apply in Scotland and if not can anyone point me in the direction of the relevant part of the regs? Doors will be around 3400mm width. It's a bungalow so only ceiling joists and roof timbers above

The 665mm is not for downward load, it’s for lateral restraint.

a wall of 3 bricks side x single storey height is considered sufficient to act as a buttress against lateral load (mostly wind)

You could get a structural engineer to do calcs and it’s possible it could be reduced.

If it was a new extension then it’s possible to cast a big steel like an angle into the foundation to do the job and reduce the wall thickness down to not much more than wall thickness

 

[noseall]

Hmm, proportions on that are wrong for me, goping by the coursing 2.1m doors, 2.4ish ceiling, 250 floor and 150 upstand I guess but not a great look.

Bonkers.
200mm joists.
24mm of deck.
50mm - zero furrings
30mm - zero pitch batten (because the roof has to slope back to front as well as crown in the middle).
150mm insulation.
150mm upstand.
And then a coping on top.

I had to revise the joist position (height wise) so that after all the materials were fixed on top, we were able to get the deck and subsequent upstand of lead, beneath the window sill. I think I set the ceiling height at about 2250mm.

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• noseall
• 18 Nov 2023

 

[noseall]

Hmm, proportions on that are wrong for me, goping by the coursing 2.1m doors, 2.4ish ceiling, 250 floor and 150 upstand I guess but not a great look.

The screws for the top deck fixing were 260mm long.

 

[better1191]

Thanks, looks like I have a few options then. Will get some quotes / advice and go from there.