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Date:         Tue, 22 May 2007 23:16:12 -0700
Reply-To:     Jake de Villiers <crescentbeachguitar@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Jake de Villiers <crescentbeachguitar@GMAIL.COM>
Subject:      Re: best t molding adhesive?
Comments: To: Bill Glenn <idahobill@gmail.com>
In-Reply-To:  <vanagon%2007052216465338@GERRY.VANAGON.COM>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

When using this material in a cabinet shop I found it best to cut it somewhat long and push it back into itself when installing.

Otherwise the stretch factor when you smoosh it ( sorry to use the tech jargon) into the saw kerf will result in unsightly gaps when it contracts to its original relaxed state.

On 5/22/07, Bill Glenn <idahobill@gmail.com> wrote: > > On Tue, 22 May 2007 00:53:57 -0600, justin - <jtrashy@HOTMAIL.COM> wrote: > > >any ideas on keeping the new t molding snug? > > > >how do i keep them from shrinking? > > > >thanks > >justin > >_________________________________________________________________ > >Change is good. See what's different about Windows Live Hotmail. > >www.windowslive-hotmail.com/learnmore/default.html?locale=en- > us&ocid=TXT_TAGLM_HMWL_reten_changegood_0507 > The vinyl used for the extruded T-molding possesses a higher coefficient > of > expansion than the plywood to which it was attached. The two materials > move at differing rates in response to temperature changes. Molding cut > to > fit at 70 degrees will increase considerably in length when the interior > of > the van is much hotter, and the molding will shorten considerably when the > interior of the van is colder; the plywood, having a lower coefficient of > expansion, is more stable over the same temperature range. The vinyl > molding, while quick and easy, and thus efficient from a manufacturing > standpoint, is essentially not suitable for an environment subject to such > a wide temperature range, without some provision for accommodating > expansion. > > Further, due to the aging of the vinyl and the consequent loss of > resiliency, the molding can take a set, locking in the wrinkles that may > have formed, and over time, it seems that the molding always comes up > short > as well. Look around your Westy, and see if that's not true. Probably the > only time the molding ever looked good was when it was new, and viewed > when > at the same temperature as when it was cut to size at the factory. > > The replacement molding will suffer from the same limitations, and no > amount of glue will overcome the basic physics in play, at least not long- > term. Also, on the replacement molding that I have used, I have found that > the leg of the T, the part that inserts into the kerf, is slightly > narrower > in section than the original molding, and does not grip the kerf as well, > thus the molding sometimes works it way loose. I have had some success > with folding a piece of duct tape or electrical tape over this leg as a > shim to make it fit tighter, but it's not really a solution. I re-adjust > some of the more-visible pieces from time to time, and otherwise just live > with it. > > How's that for a long answer to your question, without providing a > solution? > Anyone else? >

-- Jake 1984 Vanagon GL 1986 Westy Weekender "Dixie" www.crescentbeachguitar.com


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