Wow. Wiring between the deck layers? So far, I've only discovered wires between the deck and liner, which is bad enough when it comes time to replace them in some areas where they've been bonded in, and no easy alternate route exists.
-- Shawn Wright shawngwri...@gmail.com S/V Callisto, 1974 C&C 35 https://www.facebook.com/SVCallisto On Thu, May 20, 2021 at 3:30 PM Martin DeYoung via CnC-List < cnc-list@cnc-list.com> wrote: > Joe, > > > > Have you sounded the deck with a tapping hammer? If the balsa core has > separated from the laminate it will sound dull. > > > > The balsa core supplier Baltek has much good info on their web site > regarding the effect of wet balsa. IIRC the balsa can be quite wet and > still retain significant strength. Much of Calypso’s wet balsa had been > left to its own devices for so long it had created an acetic swampy soup of > rotted balsa and acid attacked polyester. The liquid was so acetic that it > instantly corroded tools used to removed the damaged laminate. > > > > When I was repairing the aprox 20 sq ft of Calypso’s cored deck that had > failed I noticed water ran significant distances along channels between the > balsa sections and where Bruckmann’s had run 12v wires through balsa > channels within the deck laminate. Also, the “stick built” interior > bulkhead attachment process left channels between the plywood bulkhead and > the deck or hull. Water from various sources traveled through these > channels then wicked up the plywood bulkhead. We repaired/replaced aprox > 14 linear feet of plywood bulkhead. In most cases the water only wicked up > 12” to 16”. > > > > I also noticed that the damp balsa around the perimeter of the repair area > only dried where exposed. If you want to insure all damp balsa is dried or > removed/replaced you may need to expand the repair area. > > > > We performed most of Calypso’s deck repairs from inside. As we kept > Calypso in its marina slip during the work we needed to avoid the > appearance of performing “major” repairs in the water. By staying below > deck we reduced the noise and dust considerably. If we had been hauled out > working from above would have been easier and faster. > > > > Martin DeYoung > > Calypso > > 1971 C&C 43 > > Seattle/Port Townsend’s yard > > > > *From: *Della Barba, Joe via CnC-List <cnc-list@cnc-list.com> > *Sent: *Thursday, May 20, 2021 10:56 AM > *To: *Stus-List <cnc-list@cnc-list.com> > *Cc: *Della Barba, Joe <joe.della.ba...@ssa.gov> > *Subject: *Stus-List fun with moisture meter and how/if to fix wet spot > > > > I got a Klein moisture meter from Amazon and decided to give it a go. > Plenty of areas I thought might have high readings did not. Most of the > deck seems to be in the 1%-6% range. The one area with a high reading is > not near any penetrations, I cannot figure it out. Forward of the mast and > aft of the forward hatch there is an area about 1 or 2 square feet that > reads high enough to peg the meter at 40%! The wet area does not extend to > either the mast or the hatch, it does not seem to come from either one. The > deck does not feel obviously mushy either, it just looks crazed in that > spot. The only real way to feel anything different is in the cabin, the > liner seems detached if you press up on it. This is basically in the > passageway forward around the hanging locker. > > > > Now the question is what next? Do I cut the deck off from above or repair > from below? My feeling is working from above will be 100 times easier until > the very last step of making the deck look not cup apart at the end. I > still have no idea how water could get there except possibly the vents that > are over the head and hanging locker. The original dorades put in before we > got the boat were very poorly done, I had to do a lot of sealing and > filling with epoxy when I put the solar vents in. It would require water to > run uphill and aft though???? > > > > Joe > > Coquina > > > Thanks to all of the subscribers that contributed to the list to help with > the costs involved. If you want to show your support to the list - use > PayPal to send contribution -- https://www.paypal.me/stumurray Thanks > - Stu
Thanks to all of the subscribers that contributed to the list to help with the costs involved. If you want to show your support to the list - use PayPal to send contribution -- https://www.paypal.me/stumurray Thanks - Stu
