Wet bricks in conservatory

[Stephenas78]

Can anyone shed some light on this issue, in heavy rain a number of bricks inside my conservatory appear wet, this is a few bricks down from the top of the conservatory see photos.
any advise very appreciated

 

[Bonni]

The outer leaf of a cavity wall does not stop water penetrating into the cavity. Over openings, cavity trays are built in between the inner leaf and outer leaf, you can see the edge of the cavity tray in the photo, on top of the brick course above the soldier course.

So water is getting into the cavity above the conservatory roof, running down the back of a brick and weeping through a mortar/brick gap/crack which just happens to be just below the conservatory roof. The only way to fix this is to fit horizontal Type E cavity trays a couple of courses above the conservatory roof, each one takes two bricks, you remove three to fit each tray. Each trays clips over the other, fit a weep vent per tray and immediately under the tray, you install a lead flashing. The lead flashing will go down and onto the conservatory roof so you will need 12 inch lead (at least an inch into the wall, 6 inch down the house wall and 4 to 5 inch onto the conservatory roof). To insert a meaningful length of flashing (each strip max 1500mm), you need to remove quite a few bricks at a time.

They're annoying to fit and the joints need packed with slate and mortar, so get a builder.

https://www.cavitytrays.co.uk/damp-proofing/view/1/23/3/type-e-cavitray

 

[Stephenas78]

Hello thank you for this advice, without knowing anything about this and with the bricks not stopping the rain from getting through, can the crack in the bricks not be sealed stopping it from coming through ?

 

[Stephenas78]

Or alternatively could the bricks above the conservatory be coated with some waterproofing cream like Stormdry?

 

[^woody^]

No cavity tray.

Yes a complete coat of a water repellant (not Thompson's or similar cheap stuff) can work on walls that are not very exposed.

 

[Stephenas78]

Thats great

Thanks Woody