sgt_woulds

Ah, and there's me believing what the man in the store said. Explains a lot 🙂 I won't be using it to re-enact the 'Solvite' adverts anyway! With CT1, you could probably have hung an elephant under the helicopter...

CT1 really is 'The problem solver' I've used it for repairing and 'stretching' concrete roof tiles on my south-facing roof (10 years on and no issues) I've used it for sealing various external areas that need to be 100% waterproof for the life of the building, but a little bit of flex for expansion and contraction of differing materials. Internal or external makes no difference to performance as far as I can tell. We once made the mistake of using CT1 to seal a cable entry through a wall for a PV system. When the owner decided to extend their house, we came back to move the system. It took 5 hefty men in a tug-o-war on the cables to pull the plug of mastic out of the wall! I've hung a hook (with a wide base) from a ceiling beam that has held a 20kg bike in the air for 2 years now. We completed an emergency repair to a chimney flaunching in driving rain and a howling gale. Inspected it two days later when the rain had finally stopped, and it was rock solid. The homeowner decided not to have the pot re-bedded. To my knowledge, it has never been properly repaired, but I'd be 100% confident that the CT1 will still be perfect. We found that the clear CT1 flows better and has a slightly longer curing time, which is useful if you need to smooth it. It is also better for repairs that need to remain invisible. It's a bugger if you get it on bare skin, though! One trick for smoothing with fingers - lots of spit. It's disgusting, but human spit allows your skin to slide over the top of CT1 without sticking - if you try to do the same with water, you will just gunk your fingers. (Spit doesn't work as well on the coloured varieties for some reason - these just seem to be more sticky in general) I always keep a tube of CT1 in my toolbox, just in case. I've tried the Wickes BT1 alternative, but the grip doesn't seem as strong, it doesn't stick as well on damp surfaces, and the clear version goes yellow in the sun. It is about £1.80 cheaper than CT1 per tube, and is fine for indoor use, but I wouldn't hang a bike off it or make a long-term roof repair...

I'm an ex-solar installer - already got panels on the front roof and would happily add more 🙂 Unfortunately, there are structural issues with adding more panels to the dormer roof, even if I could afford it. Which I can't...

I'm looking for recommendations where the product is designed for EPDM, and any real life feedback. I've used reflective paint on felt, but never on EPDM. The results were mixed, and most started cracking within 2 years and needed re-applying. I suppose I could glue a load of CDs to the roof! 🙂

Unfortunately, the Covalba covatherm paint doesn't appear to be available in the UK. My roof is already a ventilated warm roof design (raised deck / ventilated airspace / woodfibre insulation / SIPs roof structure), so no benefit in adding an additional ventilated layer above the EPDM deck, even if it doesn't get blown away 🙂

I've tried asking this in the flat roof section, but I guess no one goes there! In other parts of the world, you can buy white EPDM to keep the summer temperatures down, but not in Blighty, so I had to use bog-standard black. I've done everything I can to mitigate the summer heat on our 55m2 dormer flat roof (ventilated deck, woodfibre insulation, careful airtightness detailing), and whilst these have helped over summer, it could be better. Does anyone have any recommendations for a reflective paint that works well on EPDM?

In other parts of the world, you can buy white EPDM to keep the summer temperatures down, but not in Blighty, so I had to use bog-standard black. I've done everything I can to mitigate the summer heat on our 55m2 dormer flat roof (ventilated deck, woodfibre insulation, careful airtightness detailing), and whilst these have helped over summer, it could be better. Does anyone have any recommendations for a reflective paint that works well on EPDM?

Guess I'll have to Google that. Every day is a school day 🙂

Ed Miliband was vilified in the press for proposing a regional pricing system that would have addressed some of these issues. The main issue is that it is cheap to build onshore wind in Scotland, so lots of private investment goes there, but those investors have no responsibility to pay for power transmission to the South, where the demand is. The answer is either to demand a dividend to fund new transmission cables, or allow zonal demand pricing that will make it more attractive for investors to build wind and solar in the South and pay for the additional planning costs and construction prices involved. The lower prices near to points of power generation would also encourage energy-intensive industries to move North, which would surely be a good way to spread wealth more evenly throughout the country. Electric smelting makes far more sense oop North, where lower power prices would make us more competitive with the rest of the world. Local zonal generation with small-scale storage suits the use case for grid-forming battery storage, which would allow us to shut down more polluting power stations (I'm including Drax in that description). Unfortunately, the only message the public received from clickbait tabloids was that electricity prices would go up in the South. I'm starting to think that the 'Green Revolution' we need in this country should look more like a Chinese dictatorship. Otherwise, nothing will ever change. 😞

I expect to see Boris lying in front of a bulldozer any day now.... Perhaps a quota of Air miles per UK citizen, above which an additional TAX is due? How many business meetings could be better conducted via a video call. Personally, I'd love to travel by train across the UK and into Europe, but the economics make it impossible. The fact that you can fly from Luton to Edinburgh for a third of the cost of a train ticket shows how unfairly subsidised the aviation industry is.

We could try eating seasonally again. We've lost that sense of anticipation and enjoyment of the first strawberry of the year! Do we need to have everything available all the time?

Bunker Compost bio reactor for heat, hot water and cooking gas. Small solar panel and battery for lights and USB charging and CB radio Underground food store and a lifetime supply of mason jars. An AI chatbot for when everyone around you is gone. And a gun with at least one bullet?

Or just getting a dose of sunshine. Of the 'mistakes' made in hard lockdown, stopping people from visiting parks or open countryside was misguided for a range of health reasons. But you are overstating the facts, as have many anti-vaxers. Vitimin D on its own will not reduce the risks enough to obviate the need for vaccines, but it may improve their effectiveness. Can vitamin D supplements help protect against covid-19? | New Scientist At any rate, getting out into the sunshine and fresh air will certainly make you feel better and reduce stress. Lower stress = reduced rates of inflamation. When inflamation is reduced the body can make better use of its immune system to target infection.

I'm also not an expert, but I thought masks were to prevent or reduce the risk of a carrier spreading the infection to others, rather than protecting against infection? Without a mandate, this relied on people having a social conscience and respecting their fellows. Unfortunately, this appears to be less and less common in all societies and especially in the UK. With my customers, of all the ones I visited during lockdown when their 'carers' were there, I observed different approaches to respect for others. The patients whose carers refused to wear a facemask all died. (Two of the worst tried to forcibly remove my own face mask) Now for the conspiracy theorists types, I would present this as evidence that face masks worked in preventing infection. This would be utter nonsense as a large proportion died, even where fully masked carers and family members took all the trouble they could to protect them. Personal experience and untested, non-peer-reviewed conclusions cannot be issued as a statement of fact. I just realised that I misquoted H.G. Wells as Arther C. Clark! A brain fart, or could it be the side effects of all the Covid vacines?

The actions of those in government during Covid can be explained as: 'Any sufficiently advanced incompetence is indistinguishable from malice' Or Arther C. Clark's sentence from the wheels of chance: 'There is very little deliberate wickedness in the world. The stupidity of our selfishness gives much the same results...' Ironic, as The Wheels of Chance was all about new-found freedom, whereas for most people, the experience of the pandemic was anything but.

If you buy a Ford EV in the UK now it will be a Volkswagon. Probably better for it, apart from the stupid haptic buttons 🙂

Glossing over... and back to the OP We know who is guilty of hastening climate change, and so do they; their own salaried scientists told them back in the seventies. How can we make them pay for mitigation?

Pretty much as I expected. It is pointless to engage with Climate Change deniers and Covid conspiracists, who never provide peer-reviewed sources and do not engage with reasoned debate backed up by evidence, but cite the Great Barrington Declaration as if it was a statement of fact. As an essential worker, visiting clients daily throughout the lockdown, I experienced more than enough of the horror of the pandemic's effects. I can tell you that the true Co-morbidity cost to my customers was traumatic enough that I still find it hard to discuss. 46 of our clients died in the first week of the lockdown alone, and I stopped counting after that. Is that 'normal for the flu season'? Those who stayed safe at home, fomenting conspiracies, can never understand how truly insulting it is to hear such utter rubbish repeated, let alone as part of a general discussion on a building forum. I'm thankful that I wasn't working in a hospital where I'd have actually had to watch them die, but I can tell you that there are many thousands of bereaved family members, traumatised medical staff, carers, and other essential workers who will never forget the lockdown and will never forgive conspiracy theorists who make light of their cost. Many lessons should be learned from the lockdown, and there may be alternatives to the various forms of lockdown and vaccination schemes used around the world. But all of these should be attempted with the best of intentions - to save lives, rather than prevent inconvenience. This is something for suitably qualified and evidenced discussion between experts - not a shouting match between DIY builders...

Out of interest, which ones? Just popping up to lob a grenade...

OSB is more rigid? It may have slightly more tensile strength, but the difference is marginal, and like every material choice, the characteristics suit different scenarios. OSB3 is cheaper and generally more vapour open, which is useful if you place it inside the structure and use it as a racking board and moisture vapour-variable control layer for a 'breathing wall' system. This is common in European construction using natural insulation systems. WBP (and make sure it is WBP, as there is a lot of fake crap coming in from China) will better survive getting wet a few times and living in a moist atmosphere. Especially if you use a hardboard face WBP ply. It dries quicker when wet, and is less likely to swell if building over winter. OSB is generally fine, and will also survive a short period of being wet, but it will swell and lose its structural strength faster than WBP in the same situation. WBP is also much more expensive, harder to source, heavier, and slower to cut. If using as external racking in an exposed location in summer OSB, winter WBP. If you need something to take structural connections, then WBP will hold a screw better.

Global warming is man-made, and we do need to stop burning everything. The question is how we go about achieving that, not that it should happen surely?

Stronger and cheaper. I'll have a look tonight and see if I have any photos of the stages.

Pre MCS we had our own in-roof system that allowed the panels to fit truly flush with the tiles and worked for both new build and retrofit. It was a bit more work than a tray system but the results looked much better than other in-roof systems at the time. For existing roofs, the tiles, battens and membrane were removed. 18mm ply was fitted between the rafters to achieve a flush surface. This was then covered with EPDM and then battened and tiled around the edges to the required dimensions. Tiles could either be mucked-in, or use industrial compriband expanding tape to maintain weatherproofing. A dedicated, weathertight cable entry point was included at the same time. We used double galvanised Unistrut rails fixed to the rafters - 21 or 41mm profile, depending on the tile profile depth - with spacers to allow unobstructed run off. With panels fitted over, the surface usually matched seamlessly with the rest of the roof; this looked particularly good with all-black panels against a slate roof. One of the benefits is that the gaps at the edges were 50mm all round without any flashing details except some leadwork at the bottom of the array to lap over the eaves tiles. And of course, the bloody pigeons couldn't get underneath, unlike some of the other early in-roof designs that were only slightly better than bolt-on in terms of profile and appearance. My own in-roof panels were constructed this way and are still looking good after 15 odd years. No reason that the EPDM couldn't be replaced with a fireproof metal roofing sheet and trapezoidal fixings for an updated version of the system. Sadly, you can no longer use Unistrut for an MCS-approved system, as they refused to pay the stupidly high MCS 'approval' fees. The market was too small for them to justify compared to all the other market opportunities. The same reason that our in-roof system and bespoke slate and plain-tile fixings using unsistrut were never commercialised. Too bloody expensive to get it through MCS approval.

Sorry Rick, That's just nonsense! DC requires touch pos and neg field cables in order to create a circuit. It's perfectly safe to strip and fit one cable at a time. Even better is to work backwards from the inverter to the panels. i.e. connect the field cables to the isolator first, (with AC and DC isolators in the off position) then run them to the panels (mark the cables to ensure the correct polarity) and fit the MC connectors before plugging into the panel neg and poss connections on at a time. As long as the isolators are switched off there is no chance of arcing when connecting to the panels as there isn't a complete circuit. If you are working on an existing energised system, isolate the AC (always AC first to remove the load) then the DC Isolator to break the PV circuit. If you are capable, and the space in the DC isolator allows it, you can safely remove one cable connection in the isolator at a time. Tape them off. You could also disconnect the field cables from the panels if you don't feel confident enough in your ability to work safely. But at that point, you should really be asking a DC-trained electrician to do the work for you. I have received shocks from PV in the past, and in most cases, that was due to poor installations by cowboys. I was once passed some wet field cables by an apprentice who had connected the panels first without asking - thought he was being helpful! Boy, did he get a lesson that day! The worst shock I suffered was caused by me having a hangover... from an extremely spicy curry! I felt groggy and shouldn't really have been working (back when I was industrial abseiling, I would have walked away...) I cut through both field cables - 660v at 12 amps. I was thrown across the room and thought my heart had stopped. I was also completely blind for about 5 minutes. I decided not to continue work that day...! An unnecessary accident caused by my own stupidity in not assessing my capability to work. I have a very healthy respect for DC power, but sensible precautions and pre-agreed working arrangements are the way to go - not waiting 'till the owls start hooting before climbing up a ladder!

Can you provide a link to a website? I need similar...