Replies

1. 
   hammer1 | Jul 14, 2004 04:58pm | #1

   Companies have been using finger jointed 908 casing on exterior door for many years. They are standard on many pre-hung doors. The joints always fail in time, I would not use them for structural 2x4's. I used some Primelock, (fingerjointed pine, primed trim boards) on the exterior finish of a house 5 yrs. ago. Many of the joints are quite visible today as the wood has swollen despite carefull painting, caulking and flashing. The joint failure seems to be due to humidity changes. I won't be using it anymore.

1. 
   TrimButcher | Jul 14, 2004 05:36pm | #2

   Fingerjoint studs are likely made using a structural glue, like resorcinol.

   Door casing will likely use a cheaper, non-structural glue.

   Resorcinol joints will not fail. Resorcinol is impervious to mold, fungi, acids, alkalies, solvents, etc.

   Regards

   Tim Ruttan

1. 
   drew1 | Jul 14, 2004 06:17pm | #3

   Thanks for the info

   We are considering finger joint studs for interior non-bearing walls...But again Storage procedures by our suppliers  AND ourselves often put the wood at risk of mold.

   I know we have seen disintigration  of press-board due to fungi, so it raises some concern