In article ,
Steve Firth wrote:
Done this in Italy where I simply pointed over the foam using lime
mortar, and a frenchman to ensure a neat finish. It's lasting well.

Interesting. The rather limited instructions with the windows caution
against using mortar because of expansion of the frame - it's UPVC.

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*'Progress' and 'Change' are not synonyms.

Dave Plowman London SW 12
RIP Acorn