Glue Joint Failure

Can you guess how many pieces this High Chair is currently in?  I give you a hint....  it's a lot!  Sometimes we get items in where every bit of glue has failed.  This means all the seams in the seat come apart and  all the joints, whether doweled or tenoned or something fancier, come apart.  When this happens, we have to carefully tag each piece so that it isn't a puzzle trying to get it back together.

There are many reasons for glue to fail.  If the furniture was originally put together with Hide Glue, then a change in temperature or moisture in the air, could cause the glue to fail.  Hide Glue is very strong, as long as it is kept in normal indoor conditions.  But it is activated at high heats so if you leave the chair on the porch in the summer, the glue can be activated and then while the joint is soft (and not clamped) it can become loose and fall apart.  

Other joints fail because a bad or experimental glue was used.  In the early 1900's a Lignin glue was used and it has a very high fail rate.  We get furniture in fairly often that originally had this kind of glue used.  Joints can also fail because not enough glue was used to penetrate the surrounding wood fibers. If the chair has had a prior repair attempt, sometimes an in-experienced repairman will not clean the old glue off before applying new.  The glue then just bonds with the old (already failed) glue, instead of to the actual wood.   

Diagnosing why a joint failed can almost seem like diagnosing a medical condition.  It really does help to know the furniture's history.  But regardless of why the joint failed in the first place,  a skilled, experienced repair specialist can put the furniture back together, regardless of how many pieces it is in.  The new bonds they create between the pieces should last well into the future.  When you go into a shop to get your furniture worked on, be sure to ask lots of questions so that you know what your glue options are, what each glue's risks are, and get a good sense that they know what they are doing!

Climate Based Wood Shrinkage

Shrinkage is a major problem we see with furniture that comes into our shop.  We are in a somewhat dry climate in California and much of the furniture we see has come across from the more damp climate of the east coast.  Wood is made like a sponge, it holds water so that it stays at equilibrium with the humidity of the climate around it.  As wood goes from damp to dry climate, over time water leaves the wood which causes the wood to shrink.  

This shrinkage causes seats to split, dowels to come loose, and certain kinds of glue to fail.  The best way to deal with an issue of this kind, is to disassemble the item as completely as possible, clean all the old glue off and then glue the piece back together.  This way we can make sure that all the joints are tight and re-fitted for a now ever so slightly smaller piece of furniture

As you can see with this chair,  even though it may have come to us in complete disrepair, we can still make it tight, beautiful, and safe for use again.

Besides having newly tightened joints and seams, this chair also has a beautiful, safe new water based exterior.  We began with a Warm Cherry Stain, and then applied a Semi Gloss Finish over the top.  It is now ready for daily use for years and years to come.