Gaf

Your buildup looks far better than ours and looks to have been well thought through to allow for the patio being at internal floor level. Your DPC looks nice a high on your walls. Attached is our internal floor build up. We have an underfloor DPM (acting as radon barrier also, Moarflex RMB 400) which is unbroken and running from external leaf to external leaf. As in the blue line in the image is the DPM and it is one whole fully connected piece.

Internal floors are all done and dusted at this stage unfortunately. Only when moving ahead with the patio did I come across the DPC requirement... would have thought the architects and/or builder, knowing we said we wanted this, would have flagged the need for the DPC to be higher.

@Andehh @bmj1 Just to check on the DPC. Are yours like the one on the right side of the attached image? So you DPC went up over two blocks high or was it two blocks above your internal floor level. So your DPC is one further block higher than the right hand side version on the attached? My buildup is on the left side. I'm assuming I'm screwed now and won't be able to have the patio up flush with the internal floor level. Edit: "Pation" should read as "Patio"

Please share, thank you. What was the makeup of your DPC? Cheers for the image. Those thin linear drains look the business. What is your DPC makeup? Is the patio level with the DPC (orange line in OP) or below DPC (pink line in OP)?

Plan from the beginning of build was for our patio to be installed at the same level as our internal floor area. The patio is accessed from our open plan area through a large sliding door (3.5m). Open plan is an L shape and the patio is in the ‘gap’ in the L (if that makes sense) as the plan was to create a sense of the open plan ‘continuing’ out onto the patio. This was communicated to both the architects doing our drawings and the builder prior to starting. The plans have an Aco channel drain specified where the patio and sliding door meet. As the build has progressed and I’ve learned more about regulations, and I’m wondering if the makeup of the wall and DPC will allow us to do as planned with the patio being at floor level. Attached image shows the makeup of the build at the external wall - it's 150mm cavity. The blue is the DPC – there is the DPC membrane running from high on the internal leaf down one block (215mm) to the external leaf, then an additional single piece of DPC running along the external leaf blockwork. We had hoped to have the patio height set at the orange line. Does this DPC makeup allow this, or will we have to keep the patio lower (150mm below DPC) so somewhere approx. at the pink line? The Paving Expert website only seems to include details where the DPC is just one horizontal piece on a single leaf, rather than double leaf house with the sloped DPC.

Contacted one of the MVHR installers locally and he had an interesting take. Said a potential reason the cheaper Galvament unit might be causing the condensation issues is actually, paradoxically, because it's more powerful than the more expensive Faber unit. With airtightness levels in houses, he said a more powerful unit will suck out so much air that the MVHR can't compensate to get enough air into the house, so the fan in the extractor might just start spinning but not actually extracting, leaving the humidity in the air above the hob resulting in the condensation. He also wasn't a fan of the recirculating ones and advised venting externally to remove grease that isn't properly filtered out so that it's not getting up into the MVHR. Said just to crack a window whilst the extractor is on and that's sufficient.

Id be for this but herself wants the cooker hood as a feature in the kitchen. Getting it custom made and ordered already… 😬

So not how our architect spec’d it? 😂

Did not know that! Just searched here and online. If I've understood it, recirculating is for grease filtering while the MVHR generally takes care of the rest? Can I ask what make/model you have? And I can't seem to locate Miele discount outlet - is that in the UK? Meant to mention the extractor has to be a built-in / integrate one as we're getting a timber hood made for it.

Will have an 80-90 cm, likely 5 zone, induction hob with hood extractor. Extraction will be to the outside via the wall the extractor is mounted on. We also have MVHR. Kitchen crew are recommending a specific induction extractor. The 'standard' extractor they do is a Galvamet, but they're recommending a Faber. I compared the specs against each other and almost across the board the 'standard' Galvamet wins out against the 'induction' Faber (attached image comparison of specs). I mentioned this to kitchen crew who said it's the Faber 'Steam Off System' that makes them still recommend the Faber. Said they switched to recommending the Faber because they were getting feedback from customers who had the Galvamet, but when these customers later upgraded to an induction hob, they were getting loads of condensation dripping off the Galvamet. Faber is 500 bucks more than the Galvamet. We're at the last stages of a new build, over budget, so don't want to be unnecessarily spending but also prefer to get this right if it needs it. The Faber has that steam system and is 10cm winder than the Galvamet, but the Galvamet has better fluid dynamics, stronger air flow, and is quieter. Any ideas why the Faber, with poorer specs, may be the better option?

@Andehh It’s a new build. What kind of gap would the slit drain typically be? 50mm?

Planning a porcelain patio and path around house. Always liked the look of stone splash strips between building and paths, but reading up on them it appears they get clogged and weedy, and become another maintenance job. Alternative seems to be grated channel drain, however these look a but commercial and far less aesthetically pleasing. Wondering is there any kind of hybrid method, where maybe the grated part of the channel drain sits maybe an inch below the paving, with stone on top of this grate (rather than deep stones)?

Is there a generally accepted method of slip proofing walk in showers and wet rooms? Reading around throws up different approaches / advice. Most tiles come with an R value, almost exclusively R10 when looking for anti-slip tiles. R11 seem to be reserved for outdoor. However, R10 appears to span a wide range of frictions and can seemingly not actually have robust antislip properties at all (reference website). PTV values seem to be a far better gauge but I haven’t seen this value listed on tiles. I’ve seen posts here about going with smaller tiles for the walk in showers and the grout acts as a grip / anti-slip method. I know walk ins with antislip tiles can be a pain to clean but we’re still interested in doing it for our own. Kids will have a tray in theirs.

Genius. Wouldn’t have thought of that. Just to make sure I’m understanding it. Is the water from your DHW tank pumped through a separate ufh pipe connection to your bathrooms? Do you find the floors heat up quickly enough since it only kicks in to heat the floors when you’re showering?

Do you have them running on their own pipe separately from the UFH?