Iceverge

The sun it at about 6 deg elevation the Sun - Interactive Sky Chart | TheSkyLive.com from this website at 9am on the 21st of December. Sketching it out to scale it appears that you would need to have 14m spacing to ensure that the rearmost panels are not shaded by the first. You need to decide if your goal is maximum self use of the electricity or maximum annual production. The economics depend on your feed in tariff, the capacity you have to self use the power and your cost of bought in electricity. For maximum production 35deg works well in SE England, this enables closer spacing (especially on south facing slopes). Also an azimuth of true South is optimal. This is what commercial solar farms do. For domestic self use the equation changes somewhat. An angle of 35 would give 9.2MWh annually but only 338kWh in January. An Angle of 70deg would drop annual production to 8.3MWh but the January output would be 424kWh. Similar juggling can be done on a daily basis by splitting the array East/West giving more power in the house at times you will use it at the cost of total production. Search for @ProDaves henhouse on here. These daily fluctuations can be buffered somewhat if you have a battery or a load that can be timed from say 11am to 1pm. My rough guess on this is you'd be best off with a single array of 24 panels in landscape, 2 high at about 60-75 deg pointing due south.

Correct Ideally you would have no penetrations at all in it but those that are there would need to be adequately sealed. It should be returned to the wall and sealed here too. Then some ventilation above it. "Natural" ventilation (hole in the wall) relies on convection from heat differences or else the wind to move air. If the building isn't heated you won't have much convection although if it does get heated via sunlight a high and a low level vent will should help. Similarly the wind needs to be able to blow through the building. Vents on a wall facing the prevailing winds and the opposite are best. I don't know. Mould relies on moisture to grow. You might risk trapping moisture inside the ply as this will only create a skin on the surface. A penetrating treatment that will soak in would be better. Get the ply as dry as you can (maybe wait for summer or use a heater/heating) and then try painting on some solvent based wood preservative that will soak into the wood. Be careful of your eyes and ventilation when doing this. Try a small test patch and see if the mould returns. Yes, you could lay insulation over the felt and refelt again over the top.

Ply has a habit of doing this. In winter temperatures the air inside the shed will be slightly warmer than the outside, hence able to hold more water vapour. Once that damper air touches the cold ply, boom you get condensation and a small amount of mold. Insulation outboard of the plywood would keep it warm and solve the issue. Otherwise just ventilate away as much of the inside air as you can. You could go down the line of installing a really robust vapour barrier inboard with ventilation below the ply but I don't think it's worth it.

Some cardboard (seriously) with the hollow core has pretty decent insulative values for the thickness of it if you wanted to try something cheap (free) to get a feel if it would work or not.

Should be. The bigger the better I say. Maximum attack!! One point I would note is that the flange area around the edge seems minimal. You would be left trying to cut a very accurate hole and tape to the bare minimum the remainder. Something like this would be twice as powerful and easier to fit. Just get the seller to include the plug and a few cm of wire when posting it.

On the inside of the door.

These seals are indeed rubbish. I would remove the screen. Make sure the bath to wall seal was continuous right out to the edge of the bath. It may require cutting an arc out of the shower door as shown ( notice my hi-tech 3d renderings!) or doing some inventive siliconing. Then running a band of clear silicone where the yellow is at the outside of the screen only ( ask me how I found this out! Then attach some kind of dam where the blue line is. Maybe a strip of PVC? It may prevent the screen from moving outboard but should help any drips work their way back into the shower. Alternatively those curved shower curtains are actually not too bad. They don't tend to get all damp and clingy like that uninvited affection we've all had with shower curtains of yore.

Could you glue some ply faced PIR on to the internal face and get your joiner to make trims to make it look good? One slight (maybe overthinking it) worry I would have is getting tangled in the curtain in a fire escape situation.

Get some simple ventilation going. So long as you have some air somewhere being mechanically pushed into or drawn out of the building 24/7 it'll make a noticeable difference to humidity levels. Low humidity means everything feels warmer. In our old rental cottage I used to leave the kitchen extractor on and the internal doors open while we were out for the day. It ensured that any damp stale air was well diluted and removed from the house. It made a noticeable difference.

Welcome @Lucasgrantmaw You can build almost any style or type of house out of anything but some styles lend themselves to different methods. Do you have planning permission? Do you have a budget to work to. Do you have any special requirements for the house? We used block and block. Strip foundations. Passive house spec. One small heater keeps the house comfortable. pros 1. Cheapest option 2. Ready supply of materials and skilled labour. 3. Easy to insure, engineer, and explain. No educating professionals or searching for specialists. 4. Low risk of suppliers defaulting. 5. Very quiet. 6. Weather tolerant 7. Durable. Cons, 1. Messy 2. Slower 3. Huge embodied carbon. 4. Not nice to install services or drill holes .

Do some calculations is my advice. MF is largely oversold IMO. The insulant values are typically small. If concerned about heat protection I would sway towards denser insulations like woodfiver and hemp and even rockwool. Google "decrement delay" for an explanation. The ventilated cavity above the insulation will above an effect on the amount of radiated heat absorbed by the roof too. I echo @redbeards concerns about the weight of the build-up. Those rafters may be at the limit of their load capacity as is. I would look into making a bigger rafter by putting a 50*50 or 70x50mm battens below the purlin on line with the current rafters connecting it to the 2*3 battens with plywood gussets or plates essentially making an I beam. Then filling between the rafters with 250mm of insulation batts. 50+mm of. Insulation over the top. Wood wool and lime render to finish.

Welcome welcome. Pics always appreciated.

I'm waiting for a pure sine wave inverter to arrive from Amazon as a backup for the house via a changeover switch. Wired to my car alternator of 150A it should be able to power the lights, TV, fridge, borehole pump without too much trouble. I tried did try previously with a cheap modified sine wave inverter but it didn't play ball with the LED light bulbs, induction hob (ok that was pushing it) and the electric fence energiser. It worked perfectly for any electronics's with a built in adapter/rectifier (TV laptop) and any dumb appliances like incandescent lightbulbs. It even had a good attempt at the 2kw kettle although when I tried this it must have really "squared" off the sine wave because all the LED bulbs went haywire. @markocosic came up with the idea here if you want to read more. https://forum.buildhub.org.uk/topic/24440-back-up-generator-advice/?do=findComment&comment=375675 I will report back in the next week or so hopefully.

You can get exhaust air heat pumps for DHW only. In fact the exhaust air heat pumps for space heating are a bit like trying to invent perpetual motion. The energy needs to come from somewhere! Here's an example of a DHW ESHP. You get excellent COP with the elevated temps that the heat pump can harvest. A2A or stove heating the air means you'll get air to water heat pump running costs without all the plumbing trouble and cost.

Nothing major, Just that I noted PIR boards in the cavity. Expensive and tricky to get right. It looks like a 100mm cavity, I would consider switching to mineral wool full fill batts. Cheaper and they will work much closer to their design insulation value in reality. A parge coat and then insulated plasterboard would give you the required U value and help deal with some of the cold bridging inevitable with a renovation.

Is the washing machine unable to cope with a large volume and pressure of water and so has to cycle the solenoid to throttle the flow? Maybe some kind of inline flow reducer would work? No huge knowledge here. Just spitballing.

Where is South please? Do you have any elevations/ pictures of the house to give an idea of how any new roofs might tie in.

Hooks, hooks are the way to go. We're all manically busy people, nobody has the time to fiddle with hangers in the 21st century. Put a few rows on the back and side wall. 300mm depth would do you then.

No, I'll be the same regarding insulation. concrete thickness makes almost no difference to the heat loss value and none when there's a ventilated cavity inside it.

I've been thinking about this all day. All the above options are good but they will attract more cost unfortunately. The more I look at this the more I'm unsure if the MVHR is the right option. There's a section on the ground floor where you have 7 ducts crossing through a 225mm joist. Then what looks like 9 ducts passing through a steel beam. You're going to end up doing some serious boxing out here to get it all hidden, as well as a myriad of extra elbows in the ducts. The main purpose of any ventilation system is to provide top quality indoor air. The MVHR adds the heat recovery part to save some energy. It's debateable if it actually saves any money given the cost of filters and initial outlay. Something like demand controlled ventilation or continuous extract ventilation would also mean high indoor air quality but would be much easier to plumb in. You need not go to the hassle of making the loft a warm space either. I would run 8 ducts from a central unit placed in the loft, 2 to the ground floor W/C, 2 to the kitchen, 2 to the ensuite and 2 to the bathroom via 8 port manifold in the loft and silencer. Times 1 X Times 4 X Times X 1 Times X 1 A variable speed controller and some ducting, a few wall inlets and vents and you're home and dry. Probably less than £1000 and very simple to install by comparison. You could pair it to an ESHP like of these for about £2,500 and you'll get all then energy back you would have done from the MVHR as well as a COP of above 3 on your DHW heating. Also, something has been niggling me, airtightness hasn't been thoroughly planned in from the start. No great problem for 3 ACH maybe, but it does mean that you'll have lots of small holes. The big risk is moisture from the house finding it's way into the structure and causing rot. Running a continuous extract system would ensure that any small cracks only let air in from the outside and not visa versa by running the house at a slightly negative pressure. Any damp air is taken by the ventilation system and dumped safely outside. With diligent caulking (flexible caulk) around all penetrations you could probably avoid the need for airtightness membranes etc too. Have a think and I'd like to know what the collective thinks also. I have some other thoughts about the build too looking at the pic but one step at a time!!

It might help if you posted full section drawings of what is proposed so far. It sounds like you may have some insulation on slope as is buy it's unlikely to be a warm roof. You may want to blank out any personal details. Good news is that you're somewhat ahead of the curve here. Budget wise you'd be advised to get a hold of things as soon as possible and start designing out some expense now if you can.

Ok, will still need care however. No wrong answers, just a learning process! Don't panic! It's only a house after all and most of us are first timers. Just do the best you can. Yup. Maybe that cupboard with all the ducting on the first floor. Yes, however it may be too late and not worth the hassle. Do you have any pics of the roof as is, including the area to put the unit? Can you include a few of where the internal walls meet the first floor ceiling. What is your central heating system and how do you plan heating your hot water too? At 3 ACH the benefits of MVHR may be marginal and you could save yourself a whole lot of hassle and cash if you were maybe to opt for another ventilation strategy, and your supplier was willing to take the MVHR as a return.

Sorry more questions. I take it your kit is onsite and ready to go? Is it a trussed or cut roof? What is your airtightness target? Do you have an airtightness detail for the first floor ceiling? You have a couple of issues here, 1. The MVHR unit should be installed inside the thermal envelope. The radial ducting similarly as they will be moving warm air around. Otherwise you will risk condensation and maybe mold in your ducts and unit as well as cold air being blown into the rooms. 2. You have over 20 penetrations through the airtight layer, not impossible to solve but tricky and impossible to get a good result without a solid strategy. 3. The unit needs to be accessible for servicing. 4. The unit is very near to two bedrooms so taking care of noise must be a priority.

Hi @richo106 A couple of questions. 1. Can't see your attached files I'm afraid . 2. Is it a warm/cold loft? 3. Is it a radial or trunk and branch layout?

Whats the budget for the digger? I had a 7,5t tracked Sumitomo excavator and now a Massey 860 backhoe. The 7.5t was fine for everything apart from digging big holes in the ground. It got particularly good at bursting hoses ,pinging seals and throwing off tracks towards the end. The backhoe is awkward and slow for any back actor work but the front loader works fine. Beware any soft ground however. It goes down like the titanic. It too likes bursting hydraulic hoses. Is it an option to get a tracked excavator + tree shears and operator on hire to take to down the trees? Cheaper, faster and much safer for all involved.