QUOTE (monkeybutler @ Jun 18 2008, 04:43 PM)

Well since everyone else seems to be ignoring you, heres my thought! The safest way of doing it (if youve already checked that the truss rod/neck relief isnt the problem, and your frets are level), would be to buy a new saddle. You generally buy them made a little higher than standard so you can file it down to the right height for you yourself. If youre in the uk, check out an ebay seller by the name of treeroot4 for some quality saddles. He makes them to order too if you have specific requirements.
Good advice. (I saw his topic but had to find my as-usual long-winded post and have been pretty busy here in my office.)
Like Monkeybutler said, if everything else is okay a new saddle carved a bit higher might do it. You can also "shim" your old saddle. An easier fix, and can be about as good as a new saddle anyway if done correctly. Several companies use shimming for saddle adjustments on brand-new guitars.
From an old topic...
QUOTE
Saddle Shimming
Here's an easy way to tell first if shimming can help. (This is only a test so don't worry about tone, etc at this point.) Loosen the "offending" string(s). Take a tiny piece of thin plastic, like from a milk container or plastic bottle. Loosen your strings enough to slide a tiny strip under the string(s) at the saddle (Between the strings and the saddle.). Don't let the edge of the plastic extend beyond the edge (sound-hole side) of the saddle. Tighten the string(s) back to pitch. Try them. If the buzz has stopped, a higher saddle or shimming will probably correct the problem. Here's the copy of the old post to do that...
Here's a simpler fix. Take a tin can top
and a pair of sharp scissors or tin-snips. Cut out a strip a little
shorter and a bit narrower (approx. 1/8 inch wide) than your saddle. This will
probably curl up as you cut it. Straighten it out (tap it with a hammer
on a block of wood, etc). Be careful. This is sharp! Loosen or remove
your strings. Remove the saddle from the bridge. Put the little strip
under it (If it's too wide, don't force it or try to trim it narrower,
just make it over again. Much easier.) Replace the saddle and strings.
They will be about 10/1000 of an inch higher. Thin brass works best but most people
don't have that laying around. A tin can won't have a noticeable difference
from brass, but whatever you use, it should be made of metal to transfer the
vibrations back into the wood properly. Good luck.
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The wording in your query confuses me a little (Your use of the word "higher" gauge.). Is it that silk-and-steel strings, having less tension, cause buzz and also (the confusing part) heavier-gauge/thicker strings? Or do you mean thinner strings (which, like silk-and-steels, also have less tension). Thicker gauge strings (having more tension) should tend to increase neck-bow (as well as neck-body joint bow), thus less likely to buzz. The decreased tension (and neck bow) from s-and-s's or thinner strings frequently causes it.
If the buzz is more in the middle of the neck (like maybe 3rd to maybe 8th fret) it's possible just a slight tightening of the truss-rod might stop the buzz. (Start with about a 1/8 of a turn clockwise, wait for an hour or more as it sometimes takes a while for wood to reconfigure its shape. If it has helped but not stopped it, try another 1/8 turn. Don't exceed 1/2 turn altogether, assuming your guitar was fine to negin with.)
If the buzz is more in the higher frets, say maybe eighth or more, shimming the saddle (or re-carving a new one) is more likely to help.
Sometimes it takes a combination of both to set your action exactly how you want it. As far as higher strings giving more volume, that's true, but not a great deal more unless you wanted to raise them higher than what a reasonable action would be. The best height is whatever gives you the best ability to play at your best. A possible slight increase in volume isn't worth fighting with higher strings as you play or the intonation problems that begin to occur when a string is held down against a fret from higher above it.