Kitchen / Diner design advice

Ballymoney

Thanks weeg.
I've instructed one of the 3 I got quotes from. 
If I went for the goalpost design, using your experience, have you a ballpark figure on likely cost? I've searched everywhere and every single thread just says 'expensive'. Are we talking £5k? £10k? My house is build on clay soil so I'd expect to have to dig fairly deep down for the additional foundations.

weeg

Honestly, I couldn't give you a ballpark. Too many variables. Clay soil isn't necessarily bad for foundations - all of London is on really hard clay. Thing is though, there is currently a wall there, so that wall will have foundations. There's a very good chance you can take the steels from that existing found. You are decreasing, but concentrating the net total vertical load, but you are also changing the way the horizontal (wind) load is carried. It's not something I'd speculate on. It depends on the age, construction type, condition of the existing house and extension. But your SE should be able to chat through options.

Ballymoney

Thanks weeg. As my posts very clearly display, it's an area I know very little about but it's fascinating nonetheless.
I'll report back once I've met with my SE just in case anyone finds my scenario useful at all.

allIcouldwishfor

Doozergirl said:

These are old works of ours.   

This one I had a hissy fit over as I didn't know what I was talking about.  The house was falling down so structural work wasn't that much of a big deal.  All of the joists above were replaced, hence the flush ceiling.   

This was our last house and I just disguised it in the peninsular. 

This was a terraced house, so not on the corner, and it still needed decent support. You can see the piers on the both the internal and external walls.  

You can see us getting better at it as well 😂
In many houses it's all part of the charm. 

Gorgeous pics @Doozergirl - love that last one in particular

Ballymoney

deleted...

Doozergirl

We don't have any photos to go on, or a plan better than your kitchen.  How big is this roof lantern?  Does it need steels itself? 

You're in a position at least where compromise is possible.  Changing the roof to a flat one is an indulgence.   I've got very little against indulgences, by the way.   😋 🥂 

Ballymoney

Roof lantern is 2000 x 1000, and the flat roof is all timber frame. The only steel is the goalpost frame for the load bearing wall and a 2800 steel beam above the bifold opening.

I’ve asked the builder for greater clarity on the quote. 

Doozergirl

Labour is more expensive than materials. That's a plain fact in my business.  😬. Especially if it doesn't feature the pretty stuff like the kitchen and bifolds.  

£3,800 plus VAT for a plumber?  Is that including digging for the pipe or is someone else doing that? 

Ballymoney

Thanks Doozer. I’m really struggling to see what materials are adding up to £8.6k. There’s no extension, just a new timber roof, steel, bricks for side door / parapet etc. The roof lantern itself is quoted as £3.2k so that’s not included in the materials.

Doozergirl

Ballymoney said:

Thanks Doozer. I’m really struggling to see what materials are adding up to £8.6k. There’s no extension, just a new timber roof, steel, bricks for side door / parapet etc. The roof lantern itself is quoted as £3.2k so that’s not included in the materials.

I think I’m right in doubting this particular quote judging from your reactions. That’s reassuring for the rest of the quotes to come.

This is a really good rooflight company.  We have their flat rooflights.  They have an online quotation tool for bespoke rooflights.  You won't need bespoke so the price should be better.  Even with a generous mark up for the builder's risk... 

https://roof-maker.co.uk/rooflights/lanterns/slimline-rooflights/