Hi folks.
Upstairs bedroom window (see photo), the internal timber cill gets damp during periods of wind driven rain.
Thereafter, water appears along top edge of the ground floor window directly beneath this one - water leaks down through the internal mastic seal along the top edge of the uPVC frame.
House is mid 80s timber frame with cavity wall & rendered blockwork (Scotland).
Having tarted up the external sealant to no success, I am suspecting rainwater may be getting blown in the air vent/slot above the bedroom window (see photo). Hence I am thinking of shielding it off somehow, to see if it prevents the ingress, but have some reservations.
Is the main purpose of that air vent to let any moisture inside the wall (which presumably falls downward) evaporate and rise back out at the top air vent?
I don't know for sure but I suspect it is a precast concrete lintel over the window opening, as you can see the concrete lintel over the back door of the garage, albeit the garage is only single leaf rendered blockwork
There are several same vents along the very bottom of this gable end and one other above the adjacent window out of shot.
The slot vent measures about 58mm x 6mm wide - thinking of a plastic/rubber bung/stopper to push in rather than faffing about with mastic gun on a ladder - not good with heights. And if makes no difference I'd take the seal back out again.
Upstairs bedroom window (see photo), the internal timber cill gets damp during periods of wind driven rain.
Thereafter, water appears along top edge of the ground floor window directly beneath this one - water leaks down through the internal mastic seal along the top edge of the uPVC frame.
House is mid 80s timber frame with cavity wall & rendered blockwork (Scotland).
Having tarted up the external sealant to no success, I am suspecting rainwater may be getting blown in the air vent/slot above the bedroom window (see photo). Hence I am thinking of shielding it off somehow, to see if it prevents the ingress, but have some reservations.
Is the main purpose of that air vent to let any moisture inside the wall (which presumably falls downward) evaporate and rise back out at the top air vent?
I don't know for sure but I suspect it is a precast concrete lintel over the window opening, as you can see the concrete lintel over the back door of the garage, albeit the garage is only single leaf rendered blockwork
There are several same vents along the very bottom of this gable end and one other above the adjacent window out of shot.
The slot vent measures about 58mm x 6mm wide - thinking of a plastic/rubber bung/stopper to push in rather than faffing about with mastic gun on a ladder - not good with heights. And if makes no difference I'd take the seal back out again.
Last edited: