On 29/08/2010 22:32, Tim Watts wrote:
My kids alerted me to a crack on the window I fitted in their betdroom last
year.

In fact it is a series of cracks eminating from a single point under the
bead, probably the top centre edge of the panel.

They've sworn blind that they haven't hit it with anything and given the
apparent origin of the cracks, I'm inclined to believe them.

Now, it was my first glazing effort and I did have trouble, involving
removing the DG and doing it a second time. So it has been rather abused (I
chose a small window as my first on purpose).

So 2 questions:

a) I'm thinking a minor fault in the glass and/or the abuse I gave it.

b) (Worse) I'm doing glazing fundamentally wrong. I don't (hope) think so as
I used proper glazing packers, bridges and packed the DG in nicely without
forcing it.

and:

How does one measure a panel when fitted for replacement?

I have the invoice, so the company might have it on record and can just make
me another one. But if not, I'd rather not de-glaze to measure as I'll have
a hole in the wall for a week while I wait for a new panel.

Is there a way to determine size from the frame or the visible parts of the
glass?

If the supplier has your order on record, they will know the window
profile that they supplied you with. This is important.

If that is the case, measure from the outside of the glazing bars left
to right and up and down and they can calculate the size of the DG unit.

HTH

Dave