The hinge is deliberately made with an eccentric pin. By rotating
the plastic wheel (and hence the pin) using the screwdriver slot,
you can get some degree of adjustment. When you replace the
plastic cap, which should have a couple of pegs on the underside,
it stops the wheel from rotating in normal use.
Be careful to try and adjust them all evenly. It looks like one is
different to the others, so I'd reset all of them, then back out again
a notch at a time. This stops the door or frame moving as much. I know
they're not supposed to 'much', but UPVC doors do experience thermal
expansion and in our school I have to adjust them every season, it
One problem is they're usually delivered as a pre-set door/frameset to
a building site and some builders just whack them in any old how, not
caring if they're hung well or true, so it might be worth making up a
plumb line to check the verticals and a spirit level for horizontals
and make a decent job of it.
OTOH, a lot of the time it's suck it and see, a twiddle here, a twiddle
there and job's a good 'un .. :).
My uPVC front door (which is the typical type with a frame with a 'sandwich'
filler of part glass and part moulded plastic) occasionally drops slightly
and catches at the bottom. I have found that this has nothing to do with the
hinges - but is the frame itself slipping out of shape (In effect the top
and bottom of the door frame start to slope down slightly). If I bend down
and grip the underneath of the door at the latch end and heave up, this puts
the frame back into shape and the door no longer catches. I perhaps have to
do this once or twice a year.
When I refer to the door 'frame' in this context - I am not talking about
the frame into which the door fits - but rather the outer frame of the door
itself, into which is fitted the moulded insert.
That's interesting, never come across this yet, but I can see how it
might happen .. and we may have a door with exactly this symptom where
everything's plumb and square but it still 'drops' and catches on the
bottom edge occasionally, however the hinges are set. I'll give it a
try next time, cheers. ;)
If your door is of the same type as mine - ie having a frame like a window -
but having a moulded insert instead of a sheet of double glazing - then try
my suggestion. Just bend down and place both hands under the door at the
latch end and heave upwards (not too hard or you might lift the door off its
hinges!). You should hear a 'creak' as the door frame readjusts itself - and
you then may find that the door no longer catches.
Kev thanks for the input, I am trying anything that might work, as I
mentioned I do have an improvemnt so will keep plodding away.
I just moved to this house a few weeks ago and prior to that had wooden
doors and windows, hate these damn plastic things.
I prefer the plastic! I have plastic windows, plastic doors front and side,
plastic patio doors at the rear, plastic eves, plastic soffits, plastic roof
tile end caps... Completely maintenance free! I used to hate painting
My previous house although wooden window frames was not painted it was a
preservative, Butinox or something similiar sounding, I only done them 3
times in 21 years and the wood was still sound. I agree though maintenance
free is the way to go, the only prob with this house is the previous owner
has not maintained anything, still I got a good reduction on the house price
because of it and basically its just general maintenance stuff and internal
painting, salmon pink and blue walls with grey skirtings and rads must have
put loads off a decent house.
My previous house although wood frames was not painted, it had a
surrounding brickwork. If it has worked a little loose, the
plastic frame could easily have bowed slightly. Similarly, on the
hinge side, if it is not solidly held, there could have been
I will obviously try the suggestions, I have now checked it with a spirit
level along the top of the door
and it is off the level so it seems the frame is sagging towards the latch
How would I adjust the frame? I will try and tighten other screws and
fixings as this will short term stop it catching, however I would like to
get the source of the problem sorted, which does now appear to be the main