JamesP

+1.

The mechanical noise of our ASHP is minimal but the movement of air does create a quite a loud hum and the force of the fan is strong. Personally, I would not position the pump facing neighbours though depends on distance etc. Hopefully @SteamyTea will be along to explain about air particles colliding.

Just want to applaud your approach and effort with the floor and worktops. I did not know some resins would be so vulnerable to heat. I made three concrete worktops, trial worktop was for the utility making a forma added rebar and cut outs for sinks and a hob. A much slower process with lots of wet grinding and polishing to expose the aggregate. Most tricky aspect was moving the worktops from workshop to kitchen due to size and weight. An enjoyable and satisfying process. I would test the microcement first, adherence might be an issue. Have a feeling you might redo them. Keep it up!

They were very thorough with my claim a couple of years ago. They found one invoice out of nearly 500 with only half the vat number visible and asked me to resend a copy. I would mock up an invoice if you could find their business details and VAT number. Hassle them again.

Not a plumber, however I boxed off the areas where the trays would sit before the screed was laid. Fitted the waste in position before screed, I recommend 50mm waste pipe for runs over 2 metres. Then added a concrete pad of correct depth above PIR to allow for flush fitting of tray to final floor level. Does depend on depth of tray, mine was 40mm but will need to sit on a pad to adhere to.

Great advice from @Iceverge and @Tony L. You said what I was thinking but would seem to compliment some of the other surrounding properties!

Morning @Zak S, Thanks for the reply and images, they really help your application in context to existing properties. I think your architect is correct and knows how to proceed and in time the planners will grant permission. My own application took nearly 6 years without any objections, awkward planning officer and in a National Park.

An extension to a bungalow. Mass = Volume. The footprint looks about 50% larger than the original. Your loft space is a second floor. Ridge height relative to neighbouring properties? Your neighbours and planners are correct but carry on, you will get there.

Cedar is closed, I cut a half lap of 10mm on each edge to allow for some shrinkage (local cut boards).

Similar build up,20mm Cedar, batten, counter batten, breather membrane, 40mm wood fibre, 260mm Rockwool, Vapour barrier, 11mm OSB, Batten, Plasterboard. And lots of airtight tape.

@gavztheouch Looks great, very enjoyable part of the build. What is the final wall build up, looks like 80mm (?) T&G Wood fibre over the whole building.

Most self builders on the forum had no issues with their BCO and MVHR. My BCO rejected my first self certifying report as the Anemometer had no proof of being calibrated, (used the Buildhub anemometer) I hired this : https://www.inlec.com/testo-417-vane-anemometer-with-flow-hoods Just looked through past emails and found this reply from the BC. I have checked the ventilation commissioning paperwork and this needs to be undertaken in accordance with the below paragraphs from Approved Document F. Air flow rate testing and commissioning of ventilation systems4.42 The Regulations require:• mechanical ventilation systems to be commissioned (where they can be tested and adjusted) to provide adequate ventilation and a commissioning notice to be given to the BCB;• air flow rates for mechanical ventilation systems in new dwellings to be measured and a notice to be given to the BCB.4.43 For dwellings, the procedures approved by the Secretary of State for measurement of air flow rates and for commissioning of mechanical ventilation systems are in Sections 2 and 3 of the Domestic ventilation compliance guide. Section 5 of the guide contains air flow measurement test and commissioning sheets which should be completed by the person responsible for commissioning.

As @marshian If you have space, keep it above ground, fill from the gutters, have an overflow and pump. Don't spend 4K. Keep it simple.

@Weebles If possible the sqm of your home and possibly the volume as well, thank you.

@Weebles Do you know the sqm your Vent Axia High Flow was designed to accommodate? Worth checking the external cowl annually.

Most self builders on the forum had no issues with their BCO and MVHR. My BCO rejected my first self certifying report as the Anemometer had no proof of being calibrated, (used the Buildhub anemometer) I hired this : https://www.inlec.com/testo-417-vane-anemometer-with-flow-hoods so hopefully will now accept my report. Just looked through past emails and found this reply from the BC. I have checked the ventilation commissioning paperwork and this needs to be undertaken in accordance with the below paragraphs from Approved Document F. Air flow rate testing and commissioning of ventilation systems4.42 The Regulations require:• mechanical ventilation systems to be commissioned (where they can be tested and adjusted) to provide adequate ventilation and a commissioning notice to be given to the BCB;• air flow rates for mechanical ventilation systems in new dwellings to be measured and a notice to be given to the BCB.4.43 For dwellings, the procedures approved by the Secretary of State for measurement of air flow rates and for commissioning of mechanical ventilation systems are in Sections 2 and 3 of the Domestic ventilation compliance guide. Section 5 of the guide contains air flow measurement test and commissioning sheets which should be completed by the person responsible for commissioning.

We have Vent Axia Kinetic B Plus, all supplied by BPC. Fitted by myself. Overall happy with BPC, I probably would not spend any more on a MVHR system than necessary as simple bit of kit. It runs at 30% unless auto sensor from bathrooms kick in. Think you need a manual boost switch in a WC, our BC was very picky about it being signed off by an"expert". Do check volume as well as sqm as our unit was undersized

@JohnMo@joth Thanks for your input I appreciate a lot of homes have an average ceiling height but ours has nearly double the volume and the MVHR supplied could not meet the requirements to satisfy building regs even with the fan at maximum. I did not discover this until near completion. I had to be a little creative in the end to keep the BC happy. It works fine.

I recommend you also include the volume, ceiling heights etc. Our system was very undersized due to 3,4 and 5 metre ceilings which was not available on floor plans.

We have Keswick Outdoor Porcelain 900x600x20mm from Mandarin Stone. Surprisingly keeps clean and non slippy.

Your previous post.

Having looked at your fab plans I feel the higher figure more realistic. Had it been a straight forward new build then less. Will be amazing when completed.

From personal experience I have double boarded between bed and bathrooms and used resilient bars for the ceilings.

I fitted a Vortex treatment plant in 2020. https://www.wte-ltd.co.uk/sewage-treatment-plants/vortex I was initially a bit sceptical as it seems very basic but in use for 5 years it does the job well. Have emptied it once and cleaned all the plumbing components with a pressure washer and replaced the air regulator (Free from WTE) as the original was a poor quality component. Apart from the compressor not much to go wrong. Requires electricity, about 30W an hour.