Striking with sheathed sword

[existence123]

Hello,

During our session tonight a player suggested attacking skeletons with a sheathed sword in order to negate the damage resistance. I allowed it, but now I think I shouldn't have. Why would a sword do the same damage sheathed and unsheathed? It also seems to make it far too easy to get around not having a bludgeoning weapon. Are there any rules that deal with this? In retrospect I feel I should have allowed it, but made the weapon deal only half damage, or maybe even 1d2. Any thoughts and suggestions would be appreciated.

[Avianfoo]

It wouldn't. A sword sheath is an improvised weapon. so it does the same damage as an improvised weapon would (1d6 I think) and the attacker would take a -4 penalty.

The Adventurers Armoury actually has combat sheaths which are worth looking at as well.

[Sangalor]

It should have been an improvised bludgeoning weapon with all according penalties. It was not used as a sword, after all.
If you allow this, which you can of course, be preppared to make many feats, archetypes and weapons pointless :-)