cavity trays?

[Russell]

Can they be retrospectivly fitted? If so how much brickwork can you take out in one go using strong boys and acrows?
Is it lead with a double welt joint?

 

[mart1602]

normaly a plastic tray with lead flashing,if your going up a pitch roof you can take 2/3 ft at a time no need for support

 

[Russell]

It's a single story extension with a shallow pitch roof, on the back of a 2 story house.
All new build, you can see the vent at the top of the single storey pitch roof but building inspector thinks the tray is missing.
I will get up there and have a proper look soon.

 

[mart1602]

if the tray was missing it would piss water down the cavity straight into the house,if not enough vents drill a few perps out

 

[6feetdown]

Usually 1 weep hole per stepped tray now, I think last time I used them

 

[bobthebuilder]

if the tray was missing it would piss water down the cavity straight into the house,if not enough vents drill a few perps out

piss poor that water is getting in the cavity ,

 

[6feetdown]

piss poor that water is getting in the cavity ,

Amount of rain we are having probably got something to do with it walls absorbing water

 

[bobthebuilder]

Amount of rain we are having probably got something to do with it walls absorbing water

they shouldnt tho ,

 

[6feetdown]

they shouldnt tho ,

Depends on the ext skin I guess

 

[Russell]

One house is dry but the other (two semi's) was wet by the cavity in the rain yesterday.

 

[Brendan]

One house is dry but the other (two semi's) was wet by the cavity in the rain yesterday.

Must be a fault somewhere, maybe the roof is leaking, trays are a last line of defense and more of a precaution.

 

[mart1602]

outside skin in most cavity walls will be wet to some degree depending on brick/blocks used tray just keeps it on the outside skin