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I put in new door moulding around a door. The new moulding was a little bigger than older moulding which resulted in my cutting the baseboard/shoe moulding with oscillating saw. I am left with a small gap less than a 1/4-1/2 inch. What is best way to fill the gap so that new door moulding is flush with baseboard/shoe moulding?

Door moulding with gap

  • Are you saying you cut the baseboard molding about 1/4-1/2 inch wide and now the door molding will sit wider than intended? – Stanwood Mar 8 '18 at 13:32
  • 1/2" might be on the bigger side, but if it's closer to 1/4", quality caulk could be an option? – JPhi1618 Mar 8 '18 at 14:24
  • Or use backer rod and then caulk. – bib Mar 8 '18 at 15:36
  • @Stanwood The baseboard/shoe moulding was already there. I put in new new door with new door moulding that was wider than old door moulding. I had to cut baseboard/shoe moulding so that new door trim would fit in place – georgia-guy Mar 8 '18 at 16:21
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    I would fill the gap, I usually save fine sawdust for this reason and mix with wood glue and pack the space, calking would also work just make sure it is paintable. I like the sawdust and glue because it can be shaped and sanded when painted it looks the best to me. – Ed Beal Mar 8 '18 at 17:12
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I'd use a non-shrinking wood putty. Caulk and white glue shrink badly, meaning you'll have to apply it multiple times.

Mix up some powdered putty and use a putty knife to shape it to your molding. Let it fully cure and skim it again if necessary. Sand and paint.

Next time, set your door in place (ideally you'd set the door without casing attached and then set the casing), trace the new casing edge, and remove the door. Score the trim with a knife to create a clean, sharp line, then make your cut outside that line.

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I would fill the gap, I usually save fine sawdust for this reason and mix with wood glue and pack the space, calking would also work just make sure it is paintable. I like the sawdust and glue because it can be shaped and sanded when painted it looks the best to me.

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