Thank you all.
Its very helpful to be reminded that there is another chamber beneath so no serious consequence if it did pull through
I havent used concrete screws much. If I unscrewed one would I be able to replace it straightforwardly?
Following yesterday's points I realise that I only need...
Thanks for this.
Yes, they can only be seen on openers when they are wide open, so its not a big problem - and I can see that by doing more countersinking there is a risk of the head pulling through leading to a bigger problem!
I have recently had new UPVC triple glazed windows installed throughout. I am generally very pleased with the result - they look good and seem to work well. The standard of fitting has been high an the trple glazing gives excellent sound reduction - we are close to an airport!
My query is about...