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Message: <blockquote data-quote="Endie" data-source="post: 3540148" data-attributes="member: 141666">Removing roof: looking to prevent house sparrows nesting before thatI'm removing the roof from my house in order to add an additional storey this year.  Each year, I have several pairs of house sparrows that nest in the roof space: it's an old pan-tile roof, very uneven, with dozens of potential nesting spots.I am pretty :-C at the thought of removing the tiles and finding nests and young there.  For this reason, I had arranged to have the build done in the last week of March: the risk involved with Scottish weather should show how seriously I've tried to avoid this happening.  I also tried to seal up the obvious entrances with expanding foam last year (to no avail: plenty still nested in the innumerable other gaps) and I've put up another dozen birdboxes around my acre or so of garden, in addition to a similar number I already had.However, my builder had a hernia of all things, so the build is now delayed until the first week in July, meaning that there will be plenty of sparrows up there unless I can deter them somehow.  Reviews on Amazon about various methods all seem mixed at best: do any methods work?  Any suggestions?</blockquote>