Distorted brick apertures for new windows

[frediaz]

I am replacing some old windows with new UPVC DG ones. I have some old problems with distortion of the window apertures:

- On this photo, the top row of bricks is bowed down up to 10mm in the middle:

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• frediaz
• 4 Jul 2012
• 1

Is the remedy for this one to use the rule of deducting 10mm from the smallest aperture dimension, when giving the window size to the manufacturer, and then use something like a PVC window trim to try and cover the larger gaps at the ends?

- On this photo, the bricks have even come loose:

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• frediaz
• 4 Jul 2012
• 1

I just do not know what to do about this. Is there a risk that the bricks will rest on the new UPVC frame and start distorting it?

The house is part of an estate all built at the same time and they have replaced the windows on the other houses. It looks like they have had the same problem on the other houses when replacing the windows:

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• frediaz
• 4 Jul 2012
• 1

Any advice on these problems will be appreciated.

 

[^woody^]

If there is no lintel supporting those bricks, then you should fit one. It does look like those bricks have dropped because of no lintel being there

Otherwise, you measure the minimum dimensions, have the frame made to those plus 5mm expansion, and then hide any gaps with mastic or cover strips. Never have any bricks resting on a plastic frame