Brick and Block ground / SIP upper and roof?

[flanagaj]

Our main aim with our upcoming self build is to keep the m2 costs down as much as possible, but that being said, I do like the idea of having the upper floor and roof as a SIP fabricated system.  This would probably be installed within a week, and if you consider the jobs / time that would be covered in this time frame (brickie, first fix roof, roof insulation ...), and also the fact we are going for a seam sealed roof, which I think works well with a warm roof, it does seem like an attractive proposition.  

Has anyone done a conventional brick / block ground floor and then a SIP upper / roof, or even investigated this option, then I am keen if you could share your experience or findings.

[nod]

That’s probably the first time I’ve heard keeping the cost down m2 and  seam roof in the same sentence 

 

While I’ve not built this way I’ve worked on lots that are done this way 

Seems a very efficient way of building 

Im working on some at the moment where the third floor comes as a cassette All in in the day 

[flanagaj]

12 hours ago, nod said:

That’s probably the first time I’ve heard keeping the cost down m2 and  seam roof in the same sentence 

 

While I’ve not built this way I’ve worked on lots that are done this way 

Seems a very efficient way of building 

Im working on some at the moment where the third floor comes as a cassette All in in the day 

The seam seal roof is 58/M2 which I can fit myself after attending the Catnic course.  Clay tiles at 66 tiles / M2 are comparable in cost, and far more labour intensive.

[Russell griffiths]

Why brick n block downstairs then, why not sips or timberframe and brick outer. 
the only thing I can think off is getting all the outer faces to line up. 

[flanagaj]

2 hours ago, Russell griffiths said:

Why brick n block downstairs then, why not sips or timberframe and brick outer. 
the only thing I can think off is getting all the outer faces to line up. 

One of the reasons was to have the upper cladding line up with the ground floor brickwork.  I'm not a fan of the cladding sitting proud of the brickwork.  Trying to achieve the below look.

[Russell griffiths]

The thing to bear in mind is what is the sips sitting on, the load in a cavity wall is normally carried down the inner blockwork, so for your sips to sit on that you then have 200mm to build out to be level with the brickwork. 
 

needs a drawing really. 

[Adrian Walker]

ICF with a SIP roof is a common pair.