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Adam2 last won the day on October 16

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  1. @JSHarris OK thanks, so with the WC extract do you connect into the room extraction or run a separate duct to the manifold? I assume the former. Presumably all the water must empty the tank and at that point the air can be withdrawn from the bowl? Or am I missing something? Thanks
  2. Thanks so much for the great information and food for thought. My views are below, will evolve as we get more professionals involved and you guys /girls of course 🙂 Waterproofing - agree, it's a challenge and ICF means you can't check quality of concrete - hard to know how real an issue that is. If you waterproof the outside of the ICF then that should be less of a concern. Plenty of houses on hills even with ICF so will note this as a concern and will apply a lot of focus on this during design to ensure appropriate solution and warranty though using your warranty in this scenario is never going to be a happy outcome! Large openings - not concerned too much, you can use wider ICF if the requirement is more rebar and beams if needed. Anticipating hollow core for the largest non-slab bearing floor area and timber for upper floor to mitigate weight. See what SE (with more ICF experience) has to say. Kitchen/bathroom fixings - surely you use structural OSB or bracing behind plasterboard ? Not concerned Detailing - seen plenty of ICF houses with a sharp/contemporary finish so not concerned Skills levels - we are not building ourselves, will select an experienced ICF builder and SE. Though will be keen to monitor what is happening 🙂 Great feedback, plenty to think about. Next step is selecting SE and finding ground investigation co/conducting that pre meeting with SE and architect to kick off the detailed design. For sure will be back to read & post more questions!
  3. @Alexphd1 What was the reason for not rendering down past the dpm? My last house was rendered (traditional not acrylic etc) and that was down to paving level around the house
  4. @JSHarris I like your work on the WC 🙂 Can I ask, did you also have a room extract?
  5. Adam2


    Ahh Great, I'm new!
  6. Adam2


    Yes have 20m of glass balustrade to put on eBay as well!
  7. So many helpful and informative responses - thanks to you all. I'll add some more info here. That's an interesting idea and we could simply re EPS it - if needed considering the ground is on the other side so probably limited value in that. We are at the top of a hill and have free draining non-clay soil with a sand mix - a neighbour (not ICF) has built a place which is much larger so will also discuss with him the technique used for retaining walls. We will probably need some investigations pre-demolition to determine the extent to which retaining walls and foundations can/should be left in-situ to prevent earth movement. It may be that new retaining walls are built outside of the existing - a mad thought - if done with ICF possibly they could have a membrane attached and pushed back into position, as i say just a thought and will leave that to the SE. Talking of which I have an SE I am considering with significant ICF experience + some stepped builds so if engaged should add a lot of valuable experience here. The existing house from the 30s and the neighbouring house are fairly tight to each other - also partly a consequence of being at the end of a dead end road. Good point re costs and I am in the process of talking with builders and SEs to get a handle on how we go about this and set a budget before we get too far into this. No - will use a builder - if we use ICF (still the plan :-) ) then a builder with demonstrable ICF experience and as you suggest, possibly combining this with other strategies if required. Many thanks for the kind offer. We will take you up on that - we also have a Nudura build near us and saw the project (3rd floor concrete just in) which was very helpful though a much simpler site. OK thanks for this, I will take a look at Sika, Amvic are one of the suppliers under consideration.
  8. Adam2


    So a few snaps from Google Earth of the before images - these may be the current images also for a few months. of course Google does mangle the views and the walls are straighter than they appear!
  9. Adam2

    Hi from Dorset- re-build project

    Many thanks @JSHarris
  10. Adam2

    Hi from Dorset- re-build project

    A couple of images loaded here in prep for starting the blog
  11. Adam2

    Hi from Dorset- re-build project

    @BuildHub Admin - please can I have access to create a blog Thanks Adam
  12. OK - so I posted this under a more general topic in the heating as part of a discussion on heating/ventilation and it was suggested that I re-post the points below here for discussion :-) We're at the planning approval stage on a house re-build. It's a bit of a complex site as runs down a hill. We're re-building in pretty much the same foot print of the current house - will be guided by a SE on appropriate options re foundations/retaining walls. Will add a couple of pics to a blog in a minute. Reason for this post is to share some concerns raised by the SE that our architect has contacted re using ICFs. We're happy with our architect's design work though they have limited and not very positive experience with ICF from a project some years back. I don't know what real experience the SE has with ICF - which is what I had expected the architect to be finding out. I'm talking to other SEs myself to select one to work with on structure/detailed design/building reg. Concerns they raised are below, appreciate your thoughts on these. Adam The main concern on this project would be the waterproofing system. With an ICF product, how would the product be guaranteed? Typically the crack widths would need to be no bigger than 0.2mm. These are controlled by the amount of reinforcement and the cover to the reinforcement. With ICF both the amount of rebar that can be incorporated with the wall and the cover tend to be fixed or difficult to change. How would the walls be checked to make sure that 0.2mm crack widths have not been exceeded. The house has a lot of large openings. These could be difficult to prove using ICF due to the fixed width of wall. There are only so many bars that can be placed within a certain width of wall. This could mean that steel beams and or columns are required, causing further issues with detailing around the interfaces between the two. Care needs to be taken when installing kitchen and bathroom units as the fixings need to be taken through the polystyrene and into the concrete. The insulation could compress causing the units to be un level and out of alignment. Detailing of structural elements can prove difficult trying to comply with the detailing code. The system is advertised as low level skill required to construct the system but in reality tying of rebar and pouring of concrete are skilled jobs and need skilled labour to carry them out.
  13. Yes- I had seen the posts mentioning that. When I feel ready for a laughing session I'll ask for a quote for the bedroom and ground floor (where the TV will be)! I think we're a few years too early for this product to drop in price but would love to know some indicative costs for this - I think @NSS you were an early customer so had a good deal?
  14. It won't be multi-millions else I'm in trouble 🙂 Good guess re location - not in Sandbanks, much cheaper than there but nice views as we're on top of a hill and get some views over Poole harbour
  15. Thanks, such helpful responses. @lizzie yes I was reading your challenges there on the film. @the_r_sole that could be a sensible approach 🙂 there may be some economy there as well - for example bringing the wall up to the roof line and in slightly more on the left. The views are quite amazing though so we need to ensure we get the balance right (for us) regarding glazing/views/heat etc. Thanks @Nickfromwales will look into that - it is new to me. As the real issues are (usually) confined to 1-2 months of the year I was thinking AC prep would be a bit of risk mitigation for bedrooms. It's great to have suggestions to make us review (again) the design, after all - this is the cheapest time to do it! I'll have to study a bit more the effectiveness of different glass treatments to see how they can help with the top floor as there we are unlikely to need any solar gain in the winter.