Following some building work, the lead around the new window needs trimming prior to me fitting a new window board. Can someone advise me as to how much of the lead should remain? Currently it varies in height from 18mm to over 25mm in some places. Here is a picture hopefully shows what it looks like currently I’m assuming it doesn’t need to be trimmed flush with the base of the window. Thanks
I think there may have been viewing issues with the link to the picture - hopefully I've just changed that!