Fitting laminated glass

[Andy Hall]

Does anybody happen to know whether there is any special procedure or material required to fit laminated glass in a wooden frame?

I thinki that I read somewhere that a special putty is needed but can't find details.

Also, is there a specific amount by which the glass should be smaller than the frame in this case?

.andy

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[Alex]

I use glazing mastic and wood beading,very little mastic required.

[Andy Hall]

Can you suggest a glazing mastic product and supplier?

.andy

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[Mike Taylor]

There are many brands of glazing compound suitable for laminated glass You could try the local BP petrol filling station, chemist, pet shop or similar but I doubt if any of the above would stock it. Of course you could always try your local glass merchants as a last resort

[john]

I would imagine its a similar process to installing DG units into wooden frames. i.e you lay a bed of flexistrip along the rebates and then put the glass into the frame with packing strips around to keep the edges of the glass away from the wood. You then fill the gaps with low modulus silicone and finally some wooden beading to hold it all together.

You would want the glass to be a few mm smaller all round than the frame to allow for expansion.

Your local glazing shop will have all the bits you need to install the glass.

John

[Andy Hall]

Thanks John.

I did call one this morning and they said pretty much the same, and suggested leaving something like 5mm total in each direction for expansion - i.e. about 2-3mm gap all round between glass and wood.

.andy

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[fred]

I used security glazing tape for mine Andy, plus wooden beads on the outside, gaps as you describe. The tape was 1 or 2mm foam with super sticky adhesive on both sides from a local glazing supplies co. Mine was a security app tho.

[Andy Hall]

Thanks Fred.

My application is also a security one. I'm probably going to use

8.8mm glass for this particular job.

Where does the tape actually fit? Is it stuck to the edges of the rebate of the frame such that it's in contact with the edges of the glass, or to the face of the rebate and therefore in contact with the surface of the glass near the edges? If the latter, is some used on each side of the glass?

What does the tape actually achieve?

thanks

.andy

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[fred]

The latter, and I only fitted it to the rebate side, although if you fitted it to the beads as well I would imagine it would give extra resistance to the edges of the laminated glass pulling out under repeated heavy blows or kicking.

I have used it twice, once on DG units to avoid casual removal of the units when the beads were removed and then on laminate to make glazing in some storm doors more resistant to kicking in. It is reputed that when fitted with tape it is impossible to remove the glass from the outside without breaking it . Removal in case of breakage is from the inside by cutting the foam layer, much as windscreen fitters do.

The rebate must be scrupulously clean of course.

HTH

[Andy Hall]

Yes it does, thanks.

Do you think that the rebate should be left as bare wood or primed?

.andy

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[fred]

I didn't want to have the bond between the primer and the wood in the loop, so placed it on the bare wood. I suppose the ultimate would be a bond to metal but I stopped (just) short of lining the rebate with 3mm Alu & using Alu angle as the glazing bead ;-)

[Andy Hall]

Thanks Fred

This all makes good sense.

.andy

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