makie

Why would you use hallhooks on a cement fibre slate repair? That's what the copper rivets are for.

Yeah that's a lot of BS, we've had the same issues in Scotland with that felt. On slated roofs we don't have battens and it's still an issue. Just a cop out from them making a shitty product.

I've got a carters one, roughneck ones are also decent. For slate hooks https://www.burtonroofing.co.uk/black-coated-80mm-spiked-slate-hook-316g.html You can get them in different sizes too.

Need a good quality ripper if that's the case. My one is fine at taking out brand new coppers.

They are having metal installed, you can see it on the neighbors roof.

I always remember a tax man speaking to my old man years ago and he suggest to tradesman not to mention VAT on quotes but just to include it. Says it puts most people off.

You're not going to get them all uniform these days as I stated above mate, Redland use the excuse that they are handmade as a way out.

The cement work looks extremely poor but honestly bonnets are awful right now. I done a job recently that had 500+ bonnets and every single one of them was different. We just had to sort through the batches to try and get it the closest we could. Redlands cop out was they are handmade so they will never be uniform.

So it's solar on brackets I'm assuming? Ask the manufacturer of the tiles if they will guarantee their product with these because most don't.

bassandclan already gave you the answer, it's got laps.

Cement fibre slates are nailed then have a copper rivet fitter to stop them lifting. Hooks would be pointless.

No, that would be done before they come in.

It should be built up with steps to allow it to shed properly and make sure water doesn't creep back. Like this The felt should be ran down the valley and then the felt on the pitches should be lapped on top or into the valley. They have also used non-copper nails in it, plus lead valleys should never be nailed on the flat or further down than the top 3rd of it to allow for expansion.

Can be done but voids any warranty.

Breathable felt can leak with heavy rain over a prolonged period. The valley is most likely letting water in, doesn't look like it's been felted properly. Is it lead? if it is it's been installed incorrectly. Also the lead gulley, is it one piece? please tell me it has some elevated areas or expansion joints welded in?