mrmckenzie74

@kandgmitchell Ahhh thanks for the correction! I don't have a list, only the map that I have sent you. I assume that there's a more detailed report so i'll look in this. Whilst fantasizing about creating a cellar I paused at the thought a 4m deep dig out, considered underpinning and muck away then realised that's a lot more than I want to do on this project, so hopefully it's not that deep. @saveasteading Great to hear that a solution was found how large was the sewer and did your work around add a considerable amount of time to the scheme?

@George Very helpful response, these are the things in trying to get my head around. - Can I move the sewer, probably but it'll cost a bomb - so No! - Can I build over the chamber and or sewer, No access must be maintained, raft not likely to be suitable here. @saveasteading Brilliant! whilst this isn't a green light, it does open the door of thought for a garage / gym with access to the chamber. They may say no, but once I've had the survey I'll definitely be asking the question. Thank you both very much 😊

@Gus Potter I'm here to learn too. Me asking these questions (speculating as you say) is educational for me. The term "cantilevered slab" is a fascinating concept to me, I even started to explore the possibility of a cellar over the chamber - which again, as a concept is exciting as hell to me - be as blunt / tough as you need to be, I'm just grateful you guys are taking time to share your experiences with me and I genuinely love this sh1t. As mentioned -I'm in the process of getting the basics sorted. I'm being as pragmatic as I can as I've never been here before. TW have a set of drawings and outlined the application process - I assume that TW will need another set of drawings with revised foundations and doing my homework means I should be able to present them with the best options. I'd not dream of asking you to design anything at this point, this is just a preemptive discussion. Budget - £50k Self built so I'd expect a fair bit of change from this. SE has done nothing wrong as his scope was (and still is at this point), a rear extension. As mentioned above - "I" am enquiring about the wrap around. Good shout on the title deed thing too, although I've never had an SE as thorough as that but i'll be sure to give you a shout first in the next one.

@Conor I'm a big fan, I followed your build and was very inspired... Inspired enough that I'll be starting my own (ICF) build next year - thanks for the content!! @Gus Potter not sure if you remember me, but you've helped me before on a loft conversion a couple years back, thanks again for that and for your reply today! Your approach definitely makes a lot of sense but I hear piles and quiver! I think the ultimate hurdle - as you've mentioned - will be overcoming that manhole in the side garden. Currently the plans drawn and approved are for a 3.5m single storey rear which (by my estimates - not knowing exactly where the drain diverts across) encroaches on the 3m sewer distancing rule, by around 1200 - 1500mm. The cantilever makes sense for that right corner and a lightweight timeframe would complement the build further. I've only recently considered wrapping around the property, so nothing drawn up yet. I remembered seeing a manhole out there so dug out my drainage report and realised what I would be contending with. I may just opt for a car port here to keep things simple or a garage if that's allowed.

Thanks for your responses! @kandgmitchell Apologies, you are correct - I meant Thames! I believe 3702(mm) is the depth of the pipe. @George As it stands I'm in two minds about the entire extension... I can stick solely with a rear extension and slant / step-in the rear right corner to avoid the 3m distance-to-sewer rule but to be honest I'd pull he plug on it if that was the case especially if I had to lose much of the footprint. I'm not overly precious about extending the house but being that I have the ability and resources to do so, it just seems silly not to. Has anyone seen / experienced raft foundations serving as a suitable solution in cases like this?

Hi crew, I'm one of those that lurk on the forum religiously but have nothing of value to add... so far. Building over the typical (upto)150mm clay has never been an issue but this is the first time I've encountered a 600mm drain running through the garden. I'm wondering if any one has experience in building over / near a main sewer. SE had specified a strip foundation prior to discovering the main sewer Currently looking at a cantilevered slab as an option if need be Extension is to the rear and side (wrap around) Method of construction Specified as Brick and block Considering changing this to timber frame (my preference) if need be I've contacted Affinity water to discuss options advised to fill out an application send fee await cctv survey Whilst i await furter updates, i'd be grateful to hear your experiences and how you tackled similar situations so i have an idea of what to expect. What changes did you have to make to your plans? What additional costs arose? What you'd do differently if you faced a similar situation again? Any advice, insights would be greatly appreciated.

🤦‍♂️ Ha ha. Thanks @Carrerahill

Sounds massive! How has he fixed the glulam into the walls? And was there any specific reason he didn't go for steel?

Hey @Gus Potter do you have an engineer that you work with and can recommend for this? The typical SE will usually opt for steel beams and timber but I'm keen to work with steel sections on an upcoming build.

Legend! What blocks did you end up going with and is there any reason why you've chosen them over the alternatives?

@deuce22 what spec are the blocks that you were quoted for? E.g. The cavity (cement core section) EPS thickness either side Overall thickness of the blocks U values I'm planning a timber frame build but becoming increasingly more interested in ICF over the last few weeks. Cheers