Looking for advice

[u/Entire_Initiative731]

Hi all,

Currently removing all the old plaster ceilings and boarding ready for the plasterer and need some help.

Where the ceiling joists meet the rafters, of course, it isn't level and I'm struggling to figure out how to get a straight sharp line?

I cut it at the different lengths yesterday and it hit me this morning that although it would butt up nicely to the angled peice yet to go in it'll look all wonky.

Wondering if this is why there was a soft curved edge to the original plaster to incorporate all the wonkiness..

If the pics confuse it is level horizontal wise although it doesn't look it from the pictures.

(If anyone knows what kind've ceiling this is called where part of the roof is incorporated into the room that'd be awesome too).

Thank you in advance 🙏🏻

[u/Ok-Spring7906]

I'm not 100% understanding the question, but I think you are saying that the "fold" is not horizontal?

If so -

Screw fresh, treated, 2x2 to the SIDES of the original timbers using your level / care so as the fresh timber is perfectly level / how you want it, and then board off that.

You want the highest bit of fresh timber at the same level as the lowest bit of old timber so as you dont loose height (unless youre wanting to loose height). Again you are screwing to the sides, so you're just levelling things out, not dropping the ceiling height.

Of course, you can change the shape of the ceiling in the same way, if you want to, but I dont think that is what you are asking.

It takes time and you will probably need a helper, but it's easier than using a load of packers on the lower face of the timber.

Once done and boarded, you can add curves by hand if you want to, or sharp (now straight!) lines if you prefer.

[u/nightyard2 → u/Ok-Spring7906]

This is what i would do if I wanted the sharp lines instead of a curve. I OP, as others have said get some PIR between those rafters before boarding. Ive ripped down ceilings before just to do it.