Simplysimon

last time i went down the science direct rabbit hole i ended up reading about 6 pane glazing units and the max no. teeth for a saw blade, hours of fun

everyone thought they were rhetorical questions.

i beams with smartply glued and fixed to the face with every joint glued? then a good foam (illbruck fm330) and seal everywhere (illbruck sp925) just in case?

depends upon where you live

just add water to keep the dust down......

so not as installed and a bodge

get him to notch the face of the insulation so it runs continuously

please enlighten me

yup, unless you want to go back to using cut nails

looks like wet rot but need more/better photos and detail as to where the stairs are to help you

looks good, should have gone with hooks though, nice and easy to replace any. bend hook, slide slate out slide new slate in on a slate ripper to catch the top of the batten, bend hook back, job done. try that with double nailed slates.

'fraid not, angle grinder, 7mm drill and a long screw at the end cut to shape with some foam and/or stainless mesh to stop anything getting in at the cut.

angle grinder and cut to shape

is it not possible to put the ufh pipes 100-150mm down?

yup, it does look good, almost like new, however, the roof on the left looks 'more settled in it's surroundings'