Said It Here

How to fit trim against uneven walls

Fitting brackets or trim against old, uneven masonry walls leaves awkward gaps and forces you to choose between shims, caulking, or modifying the material itself. Because these walls cannot be demolished or easily straightened, you have to figure out how to bridge the uneven surfaces cleanly without throwing off the alignment.

What people tried

Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.

  1. 1
    Using shims and filling gaps with caulk
  2. 2
    Scribing the gap line and removing material using a table saw, belt sander, or wood planer
  3. 3
    Using all-purpose joint compound
  4. 4
    Screeding out the compound
  5. 5
    Applying new drywall on top of the existing wall

In their words

Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.

r/HomeMaintenance1 person · January 2026

“This is a purely decorative bar bracket. Do I use a shim, screw then caulk around the corner? Do I cut the bracket to the correct angle? Also, should it be flush with the wall (side) or the bar (top)? Thanks for the advice.”source ↗

git-push--force · r/HomeMaintenance · 762 upvotes
r/HomeImprovement1 person · October 2026

“I live in a 75 year old home and have about an inch to float out on an uneven wall (6x4ft area) I've used all purpose numerous times but this'll be my first time with hot mud.”source ↗

“Fyi: can't demo, it's a cinder block elevator shaft wall”source ↗

Max_Roc · r/HomeImprovement · 3 upvotes

Where this came up

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