[GBlist] re: sealing glass in a greenhouse

["Robert W. Tom" <archilogic@yahoo.ca>]

on Wed, 27 Feb 2002, 
Julie Rehmeyer <julie@math.mit.edu> wrote:

> He is planning on  setting the glass right against the timber, 
>sealing with caulk, and holding them in place by
>having them sandwiched between the timber and some 2x4s 
>screwed to the timber.  

> Does anyone have any ideas on ways to make this a little more
>leak-proof?

Julie;

I think that your friend's greenhouse is in for far more problems
than just leaks but for now, I'll just talk about his clamping system.

The glass should not be direct contact with the wood... there 
should be gaskets at the wood-glass interfaces so as to allow the
glass to freely respond to thermally-induced movement. 

Any rubbery-neopreney stuff of a suitable width and preferably 
with ribs will work for the glazing bed and large diameter (ie 
.25") rubber screen spline set into grooves milled into the 
underside of the wooden clamping bars will work for the glazing 
gaskets on the upper side) if he doesn't care to spend the cash to 
buy the "proper" stuff.

The wooden clamping bars will withstand weathering better if he 
clads them in sheet galvalume (cheap) or aluminum which can be 
bent-up on site fairly easily or he could use ready-made galvalume 
channel of the type that is used for steel stud framing.

For condensation gutters, galvanized "J-trim" as is used for 
drywall or alumimum channel runner of the type used for 
aluminum siding.
=== * ===
Rob Tom
Kanata, Ontario, Canada
<ArchiLogic@yachaffhoo.ca>
(winnow the "chaff" from my edress in reply)

Please visit http://www.theHungerSite.com daily



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