Window Corner Leaks When Raining

[Handy Trev]

Hi, so after this preparation-of-sand-cement-render-for-p ... 88347.html sloooow render and plaster job to get a first floor room into rough condition for storage/studio use, recently I've noticed leaks in both corners during rain (the room is essentially North facing). I never noticed this while the cement render was the only material on the wall, which is was for quite a while.
I checked the outside window frame corners for obvious wood and paint wear but it's actually pretty good and even during rain I can't feel overly damp corner patches outside Wondered if this is an obvious sign of something other than the obvious to more experienced people?

First-Floor-Leak-IMG_0787.jpg (72.12 KiB) Viewed 4965 times

[Handy Trev]

I should have mentioned that I do plan to touch up the paint work in the summer, but checking to see if i'm missing something? Thanks

[ayjay]

Is there a good mastic joint between the window and the masonry on the outside?

[Handy Trev]

Is there a good mastic joint between the window and the masonry on the outside?

I'm guessing not (having only just learnt this term), what would be the best way to fill this?

Front-Window-1.jpg (188.46 KiB) Viewed 4896 times

[wine~o]

https://www.screwfix.com/p/nemesis-migh ... 90ml/6697j

for one example, you'll also need a skeleton gun if you don't already have one.

[wes56]

mods,
whats going on, i edited my post an then posted it again and now its vanished?

[moderator2]

mods,
whats going on, i edited my post an then posted it again and now its vanished?

No idea. try hitting the back arrow a few times.

[wes56]

op, can you post photos of inside and outside showing much larger views of the whole window and its surround?

[Handy Trev]

Hope these help. Quite tricky to photograph it turns out.

Front-Window-Outisde-IMG_0963.jpg (224.43 KiB) Viewed 4839 times

Front-Window-Inside-IMG_0786-1.jpg (65.4 KiB) Viewed 4839 times

Front-Window-Outside-IMG_0984.jpg (187.34 KiB) Viewed 4839 times

[wes56]

it looks like theres been no maintenance on the frame for years.
moisture will be getting in at some points on both sides at the bottom of the frame.
ormaybe where its had a mortar fillet seal - you can see repairs of mortar have been carried out in the past on the stone sill.
and where the wood sill sits on a stone sill probly needs silicone sealing.
and then sanding off and painting.
maybe the wood sill near the parting bead is rotting and collecting water?

thing is you have a very old box frame thats not been attended to.
does the brick hood moulding have a lead flashing?

[Handy Trev]

it looks like theres been no maintenance on the frame for years.
moisture will be getting in at some points on both sides at the bottom of the frame.
ormaybe where its had a mortar fillet seal - you can see repairs of mortar have been carried out in the past on the stone sill.
and where the wood sill sits on a stone sill probly needs silicone sealing.
and then sanding off and painting.
maybe the wood sill near the parting bead is rotting and collecting water?

thing is you have a very old box frame thats not been attended to.
does the brick hood moulding have a lead flashing?

Yup, I plan to attend to the frame this summer, it's not as bad as it looks but I didn't want to work on it and miss something more structural. Excuse all the questions, I'm not totally sure about some of the terms here.
1) Is the "mortar fillet seal" repair you mention at the sides of the sill?
2) Is the "the wood sill sits on a stone sill probly needs silicone sealing" the same as "mastic joint between the window and the masonry" from @ayjay?
3) "does the brick hood moulding have a lead flashing?" If this the vertical bricks above the window, then no, I think it's just cement. If this is below those bricks, then I think it's some kind of very hard metal ... though as you can see it has dotted rusting, and cracking?

Looks like a lot of maintenance ...

[wes56]

in summer, after doing the maintenancewater test the frame opening with a low pressure hose pipe. start low , watch ,then work up.
the obvious repair is on the stone sill
maybe the fillets that run up the sides only need as above sealing.
the rusted metal is probly a lintel.probly best to leave it in unless it rusts and swells.
water can sometimes get behind perishing mortar an run down the inside of the box frame but it usuly shows high an low not like your stains.

[Handy Trev]

in summer, after doing the maintenancewater test the frame opening with a low pressure hose pipe. start low , watch ,then work up.
the obvious repair is on the stone sill
maybe the fillets that run up the sides only need as above sealing.
the rusted metal is probly a lintel.probly best to leave it in unless it rusts and swells.
water can sometimes get behind perishing mortar an run down the inside of the box frame but it usuly shows high an low not like your stains.

Thanks for this. Just to double check. Is the circled area the stone sill work you recommend?

Front-Window-Outisde-IMG_0963-1-Still.jpg (232.5 KiB) Viewed 4690 times

And is this the fillet sealing?

Front-Window-1-Sealant.jpg (194.58 KiB) Viewed 4690 times

[Handy Trev]

Right, it's summer enough to sort this out. Apart from wood filling, sanding and painting, are the circled areas the main silicone areas I should attend to? Thanks for all the help.