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Thanks Mr Alarm. It was the only decent thing to do to let comments know the outcome, seeing as people took the trouble to comment in the first place. Cheers

I had a simar problem a few years ago when I had new patio doors fitted, and the rain came in at the bottom. I must admit my doors were higher off the outside ground than yours, though. I cured my problem by buying a roll of 'bitumen' tape. This was about 5 inches wide, with thin metal/foil...

Hello everyone. I have today taken the bull by the horns and borrowed an 'impact screwdriver'! I selected the most appropriate looking Philips screw bit and gave it two or three belts with a hammer. To my amazement the screw has finally moved, luckily, as the head is now vitally destroyed. God...

Look again at the pic Mr Cajar, particularly the one showing the side if the lock. The curves clearly twist to the left, which would indicate distortion when trying to slackened, not tighten, if it were due to a mangled pozi head, which I don't think it is, owing to the uniformity and no...

If people think that it is an 'over tightened' posidrive head and it has been distorted equally on each slot, then the curves or 'swirls' would be rotating in a clockwise direction, but if you look at the photo, the swirls go in an anti clockwise direction. The door was new when I had it fitted...

Yes, the screw underneath is a T20. The cylinder screw is definitely NOT a 'messed up pozi', as all the four curled slots are identical and symmetrical, with no burrs or imperfections. It is a perfect 'propeller' shape. The photo doesn't show it clearly, but it is clear with the naked eye.

Mr Crank. A small flat headed screwdriver will NOT grip the curved slots and it is tight without the proper screw bit. The photos can be view by clicking on my name and then scrolling down to the 'Image Albums' in the bottom left corner. You can then select the two photos of the screw head.

Hi Eddie, There doesn't seem anything suitable in the 'toolshop' link you sent me. As far as I know there is no such thing as a Philips 'offset' screw, but merely an offset screwdriver for better access. There are PHILIPS head screws that are not in line, but they all have straight slots. This...

I meant to say that the photo's of the screw can be viewed by clicking on my profile to the left and selecting the photo album. Thanks

Thats getting a bit technical for me and I wanted to avoid the 'brutal' approach at this stage. I have uploaded a couple of photos of the 'propeller' shaped head head if anyone can help with what the head pattern is called and where a suitable screwdriver bit can be obtained? Or, if anyone has...

No, its not hidden, that is the cylinder retaining screw, right in line with the bottom of the cylinder, just like all the others. I will take a photo of it in the morning, although I don't know how clearly the screw head pattern will show up. I can't understand why there is nothing remotely...

Yes, I am positive that this is the lock retaining screw as it it the only one remotely in line with the lock. There aren't any more screws remotely in the vicinity. I know this is unusual. My other UPVC door at the back.of the house does have a standard 'posidrive' shaped head. I can't ask the...

Thanks for your reply. I have looked on the Maplin website and I don't think their security screw pack has a swirl pattern bit in the armoury. I can see that it does cover all the well known security screw heads, but not this 'curved groove' style.

Hi, I am trying to replace my existing UAP euro cylinder lock on my UPVC front door in favour of a more secure anti snap type lock, and I was horrified to find that the retaining screw for the lock, which is housed in the side of the door frame is not a standard 'Philips head' type, but some...