Swissfil

Thx I will check with BC and sips provider.

It's going to be a garage/workshop. I need a solid slab floor. I will be using 100mm EPS under the slab. The slab will be C32/40 and appx 175mm depth.

Thx for that but can't do a sips floor as will be having too much weight on it!

Won't be crossing boundary but will be right up against it. Yes I hope he will let me because it will get complicated otherwise or I'll have to loose 30/40cm from side wall which defeats the expense! Yes rain will run on to their garden/drive possibly but it is a west facing wall so very rarely. It will look good as I am cladding boundary wall in composite boards in the colour of their choice! Unlikely to affect their enjoyment I think, but time will tell. As he only lives in the country for 4 months of the year I am hoping there won't be any issues. Thx for those points

Thx Saveasteading Slab poured last is something I hadn't considered, great plan. Stone sub is fine just didn't detail it. Walls will be lined internally with firecheck. Will also have 60 min fire door to access utility at rear. Neighbour is away abroad for 8 months of the year and the house is empty, so we haven't met him yet. Hope this won't be a problem though as we have similar interests - at least that's what I understand from the other neighbours. I very much doubt he has recd the letter from planning tbh! Thx for your input

Thx SteamyTea Yes that was my concern, thermal bridge issues. There will be a built in centrifugal extractor with humidistat, but even so I don't want the sips to rot out! Also when I say workshop, it does need to be dry and warm as I will be undertaking nut a bolt rebuilds of classic cars eventually. thx for your input

Hi all, hope everyone is well? Im Phil, semi retired - well 20% at least. Few more years left to graft, but hey ho at least I've got my health ! - he says coughing...... Just moved to Portishead with my partner into our forever home. It has a single lean to garage attached which I am going to knock down and extend to make into a 7.5m x 3.5m workshop. This has always been a dream of mine which I am very lucky is now possible due to my Mum passing away last yr. I was originally going to build in cavity block with a traditional roof, but have decided to go all sips to save space, quicker build time and keep as warm as possible as this will be a car restoration hub, and also for a motorbike. We are awaiting planning as we are building to edge of our boundary. Should be with us in 2-3 weeks. I am a kitchen/bathroom designer and fitter so I am handy in terms of putting stuff together well. Whilst I have done some drawings and understand how sips fit together in terms of roof, walls, floor, it is the foundations I need help with. The garage will also have a small first floor loft as storage space (this is a dormer bungalow) but is not classed as a dwelling and has no windows, but obvs will need regs. I have done 3 drawings of possible foundation combinations, but don't know which one to go for. Not even sure if footings are right depth or width. Any help would be appreciated Pics enclosed apologies for not labelling everything - this has been done on freeform...but you'll get the general idea hopefully. I hope to do a build thread once I start in June and detail it all. Many thx in advance Phil