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SloightlyOnTheHuh OP t1_j1u62cv wrote

Reply to comment by oOorolo in fitting bifold doors. Advice needed on aperture width. by SloightlyOnTheHuh

Cool, so if I frame the rough aperture fairly square can I slim down that 5 mm each side because I know I'll have removed most of the error in the outer framing? I'll only have minimal tweaking to do I hope.

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oOorolo t1_j1u6vz9 wrote

You can, but the idea of having a minimum 1/4 inch or 5mm is pretty standard practice, so you can insert 2 wedge shims, one per side to square your frame. Leaving a smaller gap leaves less room for shims and my result in a twisted frame if only 1 shim can be inserted.

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