1930s Semi Refurb - Part 11 of ... (Summer House)

Yeah its quite a big difference in price there.

My project Im expecting will be 8ft wide by 16 ft long x 8ft tall. So that is roughly 4 sheets for floor, 4 sheets for roof, 12 sheets for walls. 20 sheets total. I would much rather pay 20x£11 (£220) than 20x£22 (£440).
 
danlightbulb said:
Yeah its quite a big difference in price there.

My project Im expecting will be 8ft wide by 16 ft long x 8ft tall. So that is roughly 4 sheets for floor, 4 sheets for roof, 12 sheets for walls. 20 sheets total. I would much rather pay 20x£11 (£220) than 20x£22 (£440).
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Find a ma' and pa' type merchants is my advice. This is a family run merchant with 1 HIAB and 1 van; I talk to the guy over WhatsApp.
 
dlockers said:
Unfinished 2x4 is £7.15 for 3.6m. I ended up getting untreated and finished 2x4 from Materials Market. There is quite a size difference... worth bearing in mind (2x4 isn't actually any of the measurements lol).
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Back to the 2x4.

You didn't get this from the same place as your OSB?

Did you only buy 3.6m lengths? Or did you buy 2.4m lengths for the walls to save on cutting/waste? If not, isn't that a lot of waste material from a 3.6m length?
 
danlightbulb said:
Back to the 2x4.

You didn't get this from the same place as your OSB?

Did you only buy 3.6m lengths? Or did you buy 2.4m lengths for the walls to save on cutting/waste? If not, isn't that a lot of waste material from a 3.6m length?
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3.6 was for the wall plates mostly. The 2.4m stuff I got from Materials Market because the merchant doesn't deal in finished 2x4. £3.36 ea
 
dlockers said:
3.6 was for the wall plates mostly. The 2.4m stuff I got from Materials Market because the merchant doesn't deal in finished 2x4. £3.36 ea
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Sorry dlockers, I'm looking on their website and I can't see 2x4 for £3.36 each, either treated or CLS.

Do you have a link please?



Re roof and floor. what size joists did you use? Im wondering if I can double up 2x4's instead of buying 2x6's or 2x8's?

How closely should I stick to span tables here? Im not building a house with a tiled roof which will take beds and wardrobes etc etc. Its an outbuilding for light storage and garden items. But, Im not sure how much I can safely deviate from recognised span tables.
 
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danlightbulb said:
Sorry dlockers, I'm looking on their website and I can't see 2x4 for £3.36 each, either treated or CLS.

Do you have a link please?



Re roof and floor. what size joists did you use? Im wondering if I can double up 2x4's instead of buying 2x6's or 2x8's?

How closely should I stick to span tables here? Im not building a house with a tiled roof which will take beds and wardrobes etc etc. Its an outbuilding for light storage and garden items. But, Im not sure how much I can safely deviate from recognised span tables.
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It has gone up a bit - £4.25inc vat now. I paid £4inc VAT but I did order 38 of them (plus a bunch of other bits).

If you are building a "shed" then it's down to you and how much you want to spend really. I used treated unfinished C24 2x4s (so slightly bigger than the CLS stuff you get from Wickes) for joists in between the bearers using joist hangers. The actual bearers are 4x3 though (75x100 treated). These are much more expensive but seemed about 10,000x better.

I'd probably scrimp on walls (I used C16 finished 2x4) and overspend on the base construction. That's the bit exposed to elements/getting battered.

What size are you building?
 
dlockers said:
It has gone up a bit - £4.25inc vat now. I paid £4inc VAT but I did order 38 of them (plus a bunch of other bits).

If you are building a "shed" then it's down to you and how much you want to spend really. I used treated unfinished C24 2x4s (so slightly bigger than the CLS stuff you get from Wickes) for joists in between the bearers using joist hangers. The actual bearers are 4x3 though (75x100 treated). These are much more expensive but seemed about 10,000x better.

I'd probably scrimp on walls (I used C16 finished 2x4) and overspend on the base construction. That's the bit exposed to elements/getting battered.

What size are you building?
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Ok I thought you'd said you didn't use treated 4x2's earlier in the thread?

Mine will hopefully be around 5x3m but I'll align it to 4ft increments to make the osb sheeting easy.

I'm hoping to lay my floor bearers on an existing brick foundation wall which was previously used for a sectional garage. So I'm just planning to span this directly with 2x6s and sheet on top. Your arrangement of ground pins was much more complex.

I fear I will be slightly over the allowed 2.5m height constraint because a sheet of OSB is 2.4m high which is the internal height I want. Add the 6x2 floor and roof joists and I'm at 2.7m total.
 
danlightbulb said:
Ok I thought you'd said you didn't use treated 4x2's earlier in the thread?

Mine will hopefully be around 5x3m but I'll align it to 4ft increments to make the osb sheeting easy.

I'm hoping to lay my floor bearers on an existing brick foundation wall which was previously used for a sectional garage. So I'm just planning to span this directly with 2x6s and sheet on top. Your arrangement of ground pins was much more complex.

I fear I will be slightly over the allowed 2.5m height constraint because a sheet of OSB is 2.4m high which is the internal height I want. Add the 6x2 floor and roof joists and I'm at 2.7m total.
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I used both --- treated for the floor (my merchant), untreated for the majority of walls.

You have no chance of getting 2.4m internal height without planning. The roof will be 4x3 + 18mm OSB + 25mm trimmers for the roof EPDM.

Timber alone I am in for ~£3k I reckon. Soffits and fascias I forgot to order are an extra £400! Cladding is super expensive too -- the front will be ~£600 and I haven't even quoted for side and rear yet lol.
 
danlightbulb said:
What's your internal height going to be?

If not 2.4m, that means you were trimming down osb wall sheeting?
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Yeah I mean if trimming OSB is a no-go for you I'd avoid a build at all tbh. This was the state of my workshop by close of play lol:

Z9SSQ5s.jpg


I only took ~20cm off of the OSB on average though - as I wanted it to cover my floor joist (4x3) and chipboard (22mm).
 
dlockers said:
Yeah I mean if trimming OSB is a no-go for you I'd avoid a build at all tbh. This was the state of my workshop by close of play lol:

Z9SSQ5s.jpg


I only took ~20cm off of the OSB on average though - as I wanted it to cover my floor joist (4x3) and chipboard (22mm).
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No I can trim it, just would have preferred not to. Wanted to build it all in 8x4ft multiples essentially
 
I think maximizing materials is a smart thing to do - but probably not to that extreme. OSB often comes in imperial (4ft) and immediately you're into cutting :).

My front inside height is 2.2m, my rear inside height is 2.125m (75 drop over 3.5m).
 
dlockers said:
My front inside height is 2.2m, my rear inside height is 2.125m (75 drop over 3.5m).
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Slightly lower than a normal house room then. I could probably live with 2.2m. I also intend to have a slight fall front to back, so the lowest part of my roof would be at the back of the building, next to the boundary.

If I could double up 2x4's instead of using 2x6's for the roof, that would give me an extra 2" to play with.
 
danlightbulb said:
Slightly lower than a normal house room then. I could probably live with 2.2m. I also intend to have a slight fall front to back, so the lowest part of my roof would be at the back of the building, next to the boundary.

If I could double up 2x4's instead of using 2x6's for the roof, that would give me an extra 2" to play with.
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I'd pay attention to span tables - that may be doable but I don't know. A sheet of 18mm OSB weighs 15kg - the rubber is like 60kg - add snow onto it and it gets quite heavy.

5x3 on the floor gives you an inch too?
 
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dlockers said:
I'd pay attention to span tables - that may be doable but I don't know. A sheet of 18mm OSB weighs 15kg - the rubber is like 60kg - add snow onto it and it gets quite heavy.

5x3 on the floor gives you an inch too?
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I haven't been able to find any span tables showing doubled up smaller joists vs standard ones.

For example - 6x2s at 400mm centres, can you use doubled up 4x2's at the same centres? (or 4x2's at 200 centres). Cant find definitive answer.

My roof span will be 3m.
 
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