external upvc window sealant gaps

21 Jan 2016
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Hartlepool, UK
United Kingdom
Hey all,

House is around 5yrs old and whilst up fitting christmas lights a few months ago I noticed some pretty big gaps and poor sealant around my 1st floor windows. The windows are always cold, when windy you can feel wind and the cold air from them so I want to solve this.


Photo attached isn't the best quality but hopefully it shows the poor silicone application from the builders.
Am I right in thinking best option is to remove it (best way of doing this? scraper/plastic spatula type? Looking at it I'm hoping I can grab it with pliers and it may remove in a whole row/line at a time as it doesn't look well attached!) and then re-apply using something like Everflex 450 with a wide nozzle and be generous so it really fills/falls into the gap to fill it, or should I be using something to apply inside the gap first due to the coldness creeping through? Some sort of filler inside the gap?

Thanks for and advice.
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Talk about shoddy workmanship. Still, what you don't see doesn't harm you seems to be the motto of many these days.

I'd do something like this:

1. Remove existing silicon.
2. Fill cavity with expanding foam.
3. Fit upvc cloaking trim and silicon the edges as required.

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