What size biscuit to use?

  • Advertise with us

« back to Power Tools, Hardware and Accessories forum

Forum topic by EFA posted 06-11-2009 04:38 AM 1989 views 0 times favorited 5 replies Add to Favorites Watch
View EFA's profile


6 posts in 3432 days

06-11-2009 04:38 AM

I’m working with 5/8” baltic birch and have a several T-joints. Should I use #10 or #20 biscuits?

Thank you,

5 replies so far

View LesB's profile


1748 posts in 3467 days

#1 posted 06-11-2009 08:24 AM

You didn’t say but I will assume you are working with a face frame??
Biscuits won’t add much in the way of strength if that is why you are using them and the smaller size will help even less. They are best for keeping things aligned as you glue them up.
If they won’t show I would use Kreg pocket holes and screws to hold it together. Even if they are visible you can plug the holes.
If you can’t use the screws and still want to strengthen the joint consider dowels inserts or there are other joints you can make, such as lap joints, and mortise and tenon.

-- Les B, Oregon

View longgone's profile


5688 posts in 3333 days

#2 posted 06-11-2009 07:53 PM

I would use the #10’s. The 20’s might be a little deep for the 5/8 if you are butt joining them.

View Moron's profile


5032 posts in 3918 days

#3 posted 06-11-2009 08:15 PM

2 cents

I politely and respectfully dissagree with LesB but not to say that there arent stronger joinery techniques out there

10s or 20s will work

-- "Good artists borrow, great artists steal”…..Picasso

View LesB's profile


1748 posts in 3467 days

#4 posted 06-11-2009 08:48 PM

4 cents
There have been several test done by various magazine on joinery and the conclusions were pretty unanimous that biscuits add very little strength to the glue joint but then again if it is glued properly the bonds are usually stronger than the wood it self. For face frames it probably makes little difference because the glue bond to the case reinforces the face frame joints. Kreg screws is still the best in my opinion and allow for faster assembly with no clamping.

-- Les B, Oregon

View GaryK's profile


10262 posts in 4013 days

#5 posted 06-11-2009 09:36 PM

I always use the largest I can get away with.

-- Gary - Never pass up the opportunity to make a mistake look like you planned it that way - Tyler, TX

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics