saveasteading

Some insects will get through any of these.

That's entirely personal taste. An ancient lead or zinc roof looks much the same.

If you can stop the liquid water coming in at metal laps, wndow joints etc then you are winning. The next stage is the dampness inside drying out. With windows open snd the summer temperatures it might be slow but will happen. That's unless any water is between 2 impermeable layers. Only then might some holes or stripping back be worthwhile. But it's mostly plasterboard or hardboard isn't it?

Don't assume it is about you. It was a general statement. Those are a bit like the the dictatorship extreme though aren't they. Except that they have public consultations for a tick box, then proceed. You can't do anything about it. Complaining or constructive suggestions would have no effect. And your road is less dangerous. (No idea of course if it affects your own view, amenity, property value). So I'm not sure that counts.

As always... first needs more info Why 3 hatches? How deep is the void? Insulated? What worries you that might need access?

Delays can be overcome, especially in a dictatorship where, not even compulsory purchase, but a dozer would appear and drive through whatever land or houses were in the way. I've a feeling that nimby blamers are generally comfortable that their property, location, lifestyle is safe but some more bypasses would suit their journeys.... but not spoil their view/ convenience/ neighbourhood. Or simply raise taxes. But that won't be on the very rich who have the money guarded.

Nimbys are other people I don't agree with. Everyone is a nimby to some degree.

Indeed. It's what we hear and some want to believe. The average person has never been so well off, long lived, healthy. Not many thousands killed in wars or crippled by disease. Pot holes are caused by bigger, powerful and numerous cars... into the seventies there were few cars. I do wonder why these invented claims of it being the worst of times are so popular. It seems to sell the Mail and Express though..... what miserable reads, for determinedly unhappy people, sponsored by oligarchs to keep us in our places?

I've got some old sealant that I should have thrown away because it was never much good. I will see if solvents are mentioned.

And good for who (whom?) . like in trickle down theory / jam tomorrow / Brexit.

You forgot Snibbo.

Off topic. You are excused not knowing this history. It was not a shortage, (The Irish Potato famine was) :but greed of the ruling classes. As perhaps is the Chinese case. It was after the Union of Parliaments, and many of the Highland Chieftains/ lords, now resident in London, became readily persuaded that they'd be rich if they abandoned the community / clan system, evicted the people and put sheep on the land. The people were loaded on ships with few belongings. Hence the very large numbers of Highland names in NE US and Canada. Some Lords were brutal, others less so. "Such a parcel of rogues in a nation" by Burns refers to Scots not English Lords.

Wiping out or evicting the natives whose land they required. That's a very extreme opposite of nimbyism. It happened here with the Highland Clearances, but we've evolved a bit since then.

But it isn't a joined up industry. As a contractor we were in competition with consultant led projects. The market, in time, found us... we hear you can give us the same performance for half the cost?. In reality it was about 2/3. I don't think that can be compared to the car industry. Actually it could a little if clients all went straight to expert contractors rather than concept-feasibility- planning-architect-SE-QS... then to 4 contractors instructed to quote 'as drawn' and the cheapest one selected.

I say: Embrace the reality of structure. The ribs are about 35mm and add a lot of strength. I guess we could use 140mm thick composite without the ribs, but nobody does. See right hand ribbed roof. The rest is slate.