Tape for glazing bars:

[cornishjoinery]

Hi guys,

I am making some windows with duplex glazing in and so need to make up some false glazing bars. What tape shall i use and where is best to get it from. Never done this before?
Many thanks

 

[petermillard]

Though I went the 'traditional' route in the end, I was considering this for the summer house I made earlier in the year, and 3M VHB tape seemed to be the best option.

http://solutions.3m.com/wps/portal/3M/e ... ree/three/

As I say, never used it, but would be interested to hear if anyone has; some impressive videos around showing the strength of e bond...

HTH Pete

 

[RobinBHM]

Reddiseals do glazing bar tape in various sizes.

I use the same width tape as the bar, although I believe some joiners use a narrower tape and do a thin bead if silicone after. If you use narrower tape and leave the gap it fills with carp eventually.

The glass has to be cleaned before application and the bars cant be over length or sometimes the foam tape doesnt bond and once water gets behind the bar comes off. Mumford and Wood used to use butyl tape, so they must have that works better for them. Would be a nightmare to get the bars off though.

Duplex bars I find are not very accurately positioned so tend to order 18mm for a 22mm glazing bar.

The bars I make in accoya. I used to use composite foam board but it expands too much. Q wood make a composite plastic / wood bar, but it would need to match your moulding. Solid timber bars are best avoided. For oak jobs, I have to select really mild straight grained stock -using any old off cuts with rubbish grain is best avoided. I think natural finish glazing bars are a wrong detail anyway.

 

[Zeddedhed]

I've just finished a job for a client where all the bars were falling off and all needed replacing. I can't remember where we got tape from (although I'll find out) but what i can remember is that if the replacement bar is bowed in the slightest you'll never get it to bond properly. Also as Robin says if the bars are too big and get forced in then you'll be in trouble.

The stuff I used was cut to be about 5m wider than the bar and then after fixing to the glass we trimmed it off using a stanley knife slightly angled. This left a mini chamfer on the tape and prevented crud getting behind the bar.

I also convinced myself that it helped shed water away from getting in behind, but thats probably just me being optimistic.

 

[cornishjoinery]

Cheers guys, thanks for the advice. Will order some of the tape. I dont know how they will fall off, can understand how they will bow, but not fall off. Surely you glue the false bars to the outside trim, which in turn is pinned to the window stiles and rails are normal.
Will be using soft wood painted.