double glazed windows and double glazed frecnh doors
IME (burgled the house at 3 am with us all in) french doors are sh1te. Make sure you have very beefy handles and "snap safe" euro locks at least. Cast handles and standard locks were worse than useless when the scrotes broke in using only a screwdriver and mole grips. Insanely easy. Dog was toss all use as well, just didn't like the draft and came upstairs to sleep on the landing.
IME UPVC double glazing can be pretty poor as well. Next doors side window was jemmied open at the same time. Better steel mesh / grill fixed into the wall on the inside. Old sheet over the window so they can't see in.
Screws are crap fixings in comparison to coach bolts but it all depends on how you can fix things, the surrouding structure etc.
Just invested in one of the 11mm Pragmasis chains plus a closed shackle lock. Just shy of £140 for 5m (boggelingly expensive but still cheaper than the cheapest frame). There's two timber beams stopping the up and over door opening and all the bikes hanging from hooks off them. Seven of them chained together with 5m of hardened steel is about as far as I am prepared to go.
Security is only any good if you use it. If it's too time-consuming or awkward then you're less likely to bother with it. Plus, whilst I don't want to gift it to the thieving sh1ts I don't want to live in Fort Knox and have it dictate my life.
Saying that there are now 3 mortice locks on the garage side door and I intend to metal plate / grill / mesh the inside of it so they can't just kick it through. That and said chain should be enough I hope. No ground anchor but with the chain through both frame triangles I doubt they'll bother cutting the frames to free them. All of the bikes chained together should be an absolute 'mare to get them out through the door.
