In article . com,
"Tigs" says...
snip out before we complete.

The more immediate recommendations we
- Damp in several areas - under guarantee from 2001 (vendors)

Depends what has caused it, and whether any "treatment" has actually
made it worse.

- Slight evidence of wall tie corrosion (due to black ash composition)

If it's only slight after 80 years you probably don't need to worry
about it.

- slight horizontal cracking - need specialist to check whether these
need to be replaced (quite a tall Edwardian semi, may require
scaffolding. Not sure of costs.

Where is it? This could be caused by the roof spread - if so it may
not need any further rectification (maybe just repointing) once that
is remedied. Doesn't sound like the ties have failed, but you might
want to lift some floorboards to check the joists.

- Roof original and missing quite a few (slipped) slates.Again might
need scaffolding so not sure of costs)
- Timber valley guttering - clearing/renewing or resealing on rear
elevation, general overhaul for all house required. Some internal
evidence of water staining to timber valley gutter.

Find out if it needs clearing or renewal, and whether damage caused
by leaks is structural or just cosmetic.

- Need drains specialist - partly blocked rear drain with no grate.
Discussed with vendors who say it does wash away but we need to check
this out as I believe if there's a problem it would be an expensive
job!

Depends where the blockage is, and whether it's caused by collapsed
pipes - best to get a camera survey if you're worried about it.

Less immediate stuff
- Master bedroom ceiling bowed and cracked and will come down at some
point, needs replacing/overboarding - is this expensive?

No.

- Other stuff that we can deal with in the longer term: Bricking up
party wall gaps, deteriorating unused chimney stack,Undersized rear
purlins (it is an old house!),Unsatisfactory triangulation of roof
structure (ie bit of roof spread - again old house, unsurprised),cement
torching on underslide of slates missing,defective flashing or pointing
on 2 chimneys inside roof space,attic winder treads to be replaced.

Sounds to me like it would be best to budget for a complete new roof,
and get the chimneys sorted at the same time. Check if there are any
regulations regarding the type of roof you can fit (conservation area
etc.)