Marvin

It's not the tiles that decide the overlap but the possibility of water being able to run underneath the overlap. Abutments can cause a wind funnel and therefore if it rains the wind can force the rain up the join!

Hi @karatekaren Actually looking at the picture again I realise it's an abutment flashing An abutment flashing is used to bridge the void where roof sheets meet a vertical wall, to provide a weathertight seal. What is the reccomended overlap of adjoining abutment flashings? The minimum ovelap of adjoining abutment flashings should be 150mm.

Don't know why there is the triangle. Each lead sheet along the joint should be no longer than 1.5 metres. If the lead is cut any longer it could lead to splitting of the lead work due to expansion and contraction. When fitting flashings they should overlap by a minimum of 100mm. Good luck Marvin

Building sites may be busy but insolvencies in construction are rampant: https://bcis.co.uk/news/construction-insolvencies-latest-news/ Lots of consolidation also happening... https://www.constructionnews.co.uk/financial/ma/?block_id=3 I am impressed with the ability of borrowers to afford the mortgages and I hope they continue to do so however..... https://www.credit-connect.co.uk/news/value-of-mortgages-in-arrears-hits-21-9bn/ Time will tell. I wish you all luck Marvin

I assume there is no chimneys on the party wall.....

Thanks to the help from posters in my last post I understand about how different voltage/amperage panels on the same string can cause loss of power. I have an existing 6KW Grid tied system with 2 MPPTs. I think I will need three or 4 MPPTs to be able to add different panels (old ones no longer available) to the system. Is there an economical way I can change my system? Any ideas? Marvin

the 320 Watt panels are also Longi. Longi 320W.pdf

Thanks for all the replies. I am a little ahead of the game with some items: The DNO permission is based on the maximum the inverter will allow to supply back to the grid which is 6000W The Inverter can cope with 7980 Watts of panels in the UK. The Inverter has 2 strings (MTTP) which can run up to 4000W max each. The existing set up has 16 x 320Watt panels = 5120W which is 64% of potential String 1 7 panels 2,240 Watts 56% String 2 9 panels 2,880 Watts 72% The Inverter is capable of taking the amperage. The solar DC cable is 6mm and about two separate 27m loops The AC cable from the inverter is 22m of 6mm clipped direct with some conduit/trunking - easily capable of taking 6kW. Hi @JohnMo Thanks for the link. I have now read it and it is clear to me. I will now calculate what the results would be.

I have 16 Longi 320W panels and wish to add some more but they are now discontinued I have found the LONGi Solar Hi-MO 6 435WP Black Frame PV Module LR5-54HTH-435M (435Watt) Technical details: 320Watts panels 435Watt panels STC NOCT STC NOCT Power 320 237.1 Power 435 325 Voc\V 40.9 38.2 Voc\V 39.33 36.93 Vmp\V 33.9 31.3 Vmp\V 33.04 30.15 Is it ok to mix them? If not, what specification would be better if I cannot obtain exactly the same. If so what are the pros and cons. Any guidance would be appreciated. M

Yes and going forward it's the capability of electricity companies being able to dump energy into your EVs - trials recently being carried out....

Hi @marsh3377 Personally I would want to know how many properties are connected to the manhole at the front, how deep the manhole is in the ground and how big the diameter of the pipe is. For your information recent discussions I have recently had indicated that the 3 metre distance is measured from the nearest part of the building footings to the nearest outside edge of the foul pipe, not from the external brickwork face to the centre of the pipe. There were also discussions about the type of ground and the 45 degree angle of load bearing from the bottom of proposed foundations. in the picture below I do not think that the footings would be permitted because they would put a load on the sewer pipe (although saying this it is possible but not without further protection... complicated. You need to know how many properties are connected to the manhole at the front, how deep the manhole is in the ground and how big the diameter of the pipe is, and this information will give you some indication of the challenges. And finally as @Conor said above the records saying where the pipe is may be wrong. At the back of the properties down our side of the street the main sewer is 4 metres nearer to the buildings than the records show! That the difference between planned positions and "as built"!!!! Good luck Marvin

Hi @bobbyb Is your bungalow a timber frame with brick/block external wall? Is your location very exposed to driving rain? Are the external walls painted? and as @Conor asks have you got a foot of insulation in your loft?

Hi @Steve law You must love taking on a challenge.... Digging deep foundations requires thought about the depth proposed, the proximity of other buildings and the extent to the site is owned in my opinion. Start with all that information and you should get the best relevant responses. Good luck Marvin Oh and of course nearest trees and service runs... and?

Hi @Alwayslearning22 If your determined to fit a high powered shower over a bath then the Milano Nero looks the right sort of choice to me. The key to this is the bath rim and levelness. If you directly message me I will guide you through how I would fit the screen. Good luck M

Hi @Markuz Are you designing the Enerphit retrofit yourself or are consultants/architects designing it all? Very important to understand at this stage. Your first post on the subject suggests that this is your goal and it may not be achieved. This could be a funds issue - which we all face - or the fact that you are leading the design decisions. Anyway, it sound exciting and I would make the following comments: In my opinion the best way to have low energy use in a property is not to use it, which means insulating the building to within an inch of it's life (if you want a comfortable temperature in the building) to start with. This will save you more than anything else you can do as heating is the number one energy user! We have no heating unless the outside temperature is constantly below 12C during the day. If I was designing our bungalow retrofit again I would have considered how to handle excess heat from the cooking/kitchen equipment, utility equipment and solar gain more. Our biggest bug is overheating. Good luck Marvin