In an earlier contribution to this discussion,
RossG wrote:

Hi

I'd like to replace the only remaining none DG window in our extension
with a UPVC window, the question is what should I measure? Width wise
I've measured from brick to brick but I'm worried about the top of the
window when it comes to measuring the height. The bricks sit on a
thin layer of mortar on top of the RSJ, the lip of which is set back
from the brick face, i.e.

| Brick
|________
| ------Mortar
=======
^
|
Lintel

Should I measure from the bottom of the cill to the bottom of the
lintel and make up the gap with silicone filler (which doesn't sound
aethetically appealing), or should I measure to the brick and "shape"
the frame so that it sits flush with the brick? The distance between
the brick and the bottom of the lintel is 7mm which is quite a thick
bead of silicone.

Any suggestions?

Thanks

Ross

Well, the frame has to go *under* the lintel - there's no two ways about
that. You can't start chopping bits off the frame so that some goes under
and some doesn't.

If you don't want to fill the gap between the frame and the brickwork with
silicone, there are a couple of other possibilities. If you rake out some of
the existing mortar, you may be able to re-point it, with some new mortar
which extends from the top of the frame to the underside of the brickwork.
Alternatively, you may be able to stick a length of uPVC beading along the
top of the frame to cover the gap.

When ordering the window, make it a few mm less the the actual aperture in
both width and height - plus a bit more if the angles of the aperture are
out of square - otherwise, you'll never get it in!

--
Cheers,
Set Square
______
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