Thanks for that reply.
I think that it must have been mastic that has cracked and it will have been not helped by the wind as the gales here in the Outer hebrides are quite something!!
I will check-when this current gale abates-- for the window being loose as when the wind is over...
Can anyone help me in the selection of the right sealant to reseal my uPVC windows ?
The wind has caused movment and there is a crack between the frame and the concrete cill and surrounds around the frame
Looking on line at the main suppliers there is a wide range of types of silicone...
