How to Patch and Blend a Damaged Drywall Corner
Repair a chip, gouge or crack at an inside or outside drywall corner, then blend both faces. This covers cosmetic damage on a sound corner, not a moving or broken one.
What you need
Model 09410MAXXGRIP® Inside Corner Tool, 4”
$24.35 each$16.56 each at 100 or more
Model 09411Inside Corner Tool, 4”
$21.85 each$14.86 each at 100 or more
Model 05560Inside Corner Tool, 2-1/2”
$3.84 each$2.66 each at 100 or more
Model 09158Inside Corner Wipedown Tool
$18.70 each$12.72 each at 100 or more
Model 09425MAXXGRIP® Outside Corner Tool, 4”
$24.45 each$16.63 each at 100 or more
- compound suited to the repair and the patch category already there
- tape or corner reinforcement if the repair needs it
- primer and paint or texture to match
- drop cloths and a work light
Steps
- Name the corner: inside, outside, or a three-plane pocket. Photograph it in front and raking light.
- Press-test the corner. Stop if the board flexes, the crack opens, the tape is loose past a small area or the nose is bent.
- Mask and contain the area. Check paint age for lead before you scrape or sand.
- Remove only failed material back to sound edges with a stiff scraper. Do not dig out a sound corner.
- Brush or vacuum out all dust. Sight a straightedge along each face to set your references.
- Place compound on both faces with a flat tool. Keep the crease or nose as your reference.
- For an inside corner, run the corner tool down the angle with the handle on the bisector. Stay clear of three-plane pockets.
- Let each layer reach the maker's condition, then blend, prime and match texture and paint.
Tips
- Use the 05560 (2-1/2") for a short repair. The 09410 and 09411 are 4" with a MAXXGRIP handle and hardwood handle.
- Do not add force with the 09410 or 09411. It prints heavy rails at the wing edges.
- Stop the wet fill a little short of the final plane if the compound shrinks.
- Make the final blend with the 09158 wipe-down tool where its geometry fits the corner.
Watch out
- Paint in pre-1978 housing may contain lead, and old patching material may contain asbestos. Assess before dry scraping or sanding.
- A wider feather cannot stabilize a moving board. Fix the cause first.
- A crack that returns with the seasons, or water or mold at the corner, means a bigger repair than this one.
Questions about the right tool for your job? Email cs@hydestore.com or call 508-916-6442.




