Gradually sand down doors


Wooden doors, such as simple modern-style doors, can be easily sanded on their even surfaces, just like normal steel doors. The sanding of cassette doors or glass doors with separate frame and filling calls for finer grinding tool and manual work is often recommended.

Surfaces and profiles

Who wants to sand down doors, usually has the surfaces of the door leaf in mind. Both wood and steel doors can be easily sanded during a refurbishment and prepared for a new coat of paint or varnish. Smooth door leaves require little effort with an electric orbital sander.

The side profiles of most types of doors consist of two narrow running surfaces arranged at right angles to each other. For sanding the profiles, a delta or corner grinder is suitable. The same applies to the counter profiles in the door frame.

Uneven and stepped surfaces

More complex is the sanding of doors, which consist of a frame with filling or multi-part door leaf elements such as cassette doors. If a restoration of the doors is intended, handwork is recommended. In this type of machining, a yielding of the material or unstable connections when exerting the grinding pressure can be felt and adjusted.

Moldings or engraved jewelry profiles on a wooden door are delicate and difficult to access. With small abrasive carriers in an appropriate shape, the surfaces and deposits can be ground thoroughly and gently. Suitable abrasive carriers or hand grinding aids are:

  • wooden blocks
  • grinding blocks
  • sanding sponges

The best sanding results are achieved with sandpaper pulled loosely over the fingers. This work is elaborate, but also very gentle. Depending on the condition of the door, it may be possible to disassemble nailed trims.

In some cases, picking the doors to remove old paints and paints is a supportive or ablating alternative.

This is how you grind a door

  • Abrasives 120 to 400 grit
  • Oscillating sander
  • Corner or delta grinder
  • vacuum cleaner
  • Thick brush with long soft bristles
  • Tack cloth
  • Masking tape made of crepe

1. Remove door fittings

Remove all metal covers and fasteners from the door leaf, door frame and / or door frame. If the locking mechanism or moving parts are exposed, glue them to protect them from the sanding dust.

2. Fill the door

Before sanding, fill all open spots, cracks and holes with wood putty according to the manufacturer's instructions. Remove chippings.

3. polished section

Start with the coarsest abrasive with a grain size between 120 and 250. When using multiple abrasive media, be sure to use the same grade for all sanding operations in one pass. Grind with circular or cross-shaped motions.

4. Fine grinding

Increase the grit to at least 400 for the last sanding cycle. After each sanding cycle, remove the dust with a vacuum cleaner, brush the profiles with a brush, and then wipe with a dust-binding cloth.

5. Priming

Apply according to the manufacturer's instructions on the primer or primer and let it through dry.

6. regrinding

A final regrinding with 400 grit or finer increases the durability of the next coat.

Tips & Tricks

If you want to glaze the door, you have to be more careful not to leave any marks when sanding.


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