SteamyTea

Was not random at all. I just happened to be in the industry as some new system came into place. This gave me the opportunity to compare them. Soon nailed the problem. It helped that I was dealing with high temperatures and humidity levels of 100%. So could quickly 'rapid age' materials. If you want to know the solution I found, then get your cheque book out.

Just a few drops of water is enough to stop the curing process. What I suspect has happen is, as mentioned, there is a poor bond between the OSB and the initial layer, or layers of GRP. What would concern me, and would need investigation, is where is the water getting in from. Without knowing that, any replacement may just not work. I developed an osmosis proof GRP system about 30 years ago. Some of the parts are still doing sterling service. They system is for sale, but not cheap. £100k should cover it.

So am I

I seem to remember that they also look at the possibility of people paying the loan at a higher rate than it is borrowed at. So if you borrow at 5%, the banks have actually calculated at 8%. In the recent past this did not happen and even a small rate increase caused defaults. There is also a big difference in secured and unsecured loans, different criteria for different goods. Quite simple, cash is king. If you can save £8,000/year buy moving in with parents, do so. It is £160/week in your pocket, buys a lot of plasterboard. A bit more here: https://www.duncanyeardley.co.uk/news/buying-a-home/what-is-mortgage-affordability-criteria.html https://www.clearscore.com/mortgages/mortgage-affordability-assessments http://www.intermediaries.hsbc.co.uk/criteria/residential-lending-criteria.html

Which end of Cornwall are you. Half hour from the Tamar is kind of Bodmin/St. Awful.

You can download the 5 minute generation by fuel type from Gridwatch. Then add in the Tonnes CO2/MWh for each fuel type. You could then try extrapolating into the near future to get an idea of what to expect. I think there are also a number of government reports on the DECC site. They have proved to be pretty robust.

Crop spraying?

Long time since I had to do MCS RHI compliance, but there used to be a rule that you had to work out total heat loss and make sure the heat pump could supply that 99% of the time. Was not difficult as you have all the info anyway.

Sensors in the MVHR are useful as they give a mean house and external air temperature reading.

Or can you just follow there rules and claim to be a competent person. More probably global prices dropping.

May have been. Last evening the wind speed dropped where I am, this meant the house had lower losses through ventilation and through the external wall surfaces. A sprinkling of rain in a wall can increase losses because of evaporation, but never worked out by how much, it is rare to get those sort of shower days here.

Looking into the real differences between building methods. Do you have any permanent temperature data logging going on?

I bought a cheap, twin impeller, pump from Screwfit. Similar to this one: https://www.screwfix.com/p/salamander-pumps-ct50-xtra-regenerative-twin-shower-pump-1-5bar/20423 Just connect to a hot pipe, the F&E tank, the mains via an RCD/MCB and isolator. Been working fine for last 13 years. I do have very soft water though.

Thanks.

@NSS What is your house made of?

Not dark here yet. But it seems to heading towards parity considering that there is usually a 2° to 3°C temp difference inside a house.

Check it later as well. See if the temperature equalises once the sun goes down.

And greedy.

I think that part of the reason to use EV batteries connected to the grid is to give the impression that energy storage is cheap and versatile. Really just a method of shifting the cost to some consumers.

I read stuff, more the academic papers. I shall look at my bookshelf and see what I have. A lot of it is obvious though and then just goes into a well crafted rant. What would be good is some more basic science stuff. Thinking that showing people why CO2, and other gases, actually changes the thermodynamics of the atmosphere. Some basic statistics would help to. Too many people think that a temperature rise is just like turning the heating up. They don't grasp how a different climate regime changes the variability.

Health and Safety. I interpreted that as hen pecked with small genitalia, but kept that to myself. While you are here, how did you manage to block me from: https://forum.buildhub.org.uk/topic/10651-are-plasterers-the-worst/?do=findComment&comment=179803 by quoting me. And I still can't login from my phone. Did use the Contact Us link, but seems there was no one at home that day.

There was a long line of cars to get into my local tip. I drove past them, parked up in the layby, got my single black bag of household waste and walked into the tip. Was told in no uncertain terms that I was not allowed in. I was 5 feet from the container. When I mentioned this over at the other place, our old mate DamonHD said he had a similar problem, as he had no car. He organised, with the council, a 'pedestrian day'. A day that normal Londoners, who don't own cars, can take stuff to the tip.

You keep mentioning this, but you are saving on imports, anywhere between 12p and 24p/kWh, depending on your tariff. If you save 2 MWh on import, that is somewhere between £240 a year and £480 a year. Not to be sniffed at.

Yes, I agree, but was highlighting the problems of choosing the correct battery/storage size, and the importance of data logging.

Trouble with that is it just gives daily, weekly, monthly or annual loads, does not help much in finding out when you import and when you would export. May be worth getting an energy logger and finding out what you use in your current place. As an example, I found out recently that I import no energy 60% of the time. That is not a contiguous 60%, but a few minutes every half hour or so. Below is an example of a typical day.