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Brickwork damp patch after prolonged heavy rain

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3 days now after a few days of prolonged heavy rain and I've still got a damp patch on my SW facing gable/chimney.  The 4 chimney pots are blanks filled with various stuff (as supplied by builder) over a lead tray but I fear the pots are collecting water.

 

Before I suggest this to the builder are there likely to be any other reasons?

 

Thanks 

IMG_20180106_115424.jpg

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Obviously there's a reservoir there filled with rainwater. That should be a relatively quick fix. To advise any further we would really need to be up some scaffolding poking around :/

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Hi

Plus one to the above but I would think that's going to leave some salts behind when it does dry out. I'd have a word with the brick manufacturer to see if that's going to be a problem and how best to treat it 

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I have a similar problem with my west facing wall, permenantly soggy ( well it has been such a wet winter/ summer). My builder ( who’s been brilliant) has suggested a water proofing agent on that wall ( when/if it dries out in the summer) he has done this many times in our location next to the Atlantic 😱.

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7 minutes ago, Nickfromwales said:

Waterproofer will hold the moisture / damp in. That's the opposite to a cure ! 👎

I concur - it's the quick and easy solution that causes more problems than it solves. They do that on sandstone tenements up here to stop moisture penetrating, but it always gets in and if it's been waterproofed, never gets back out causing more untold misery. The other sin is to re-point the walls using cement (rather than a lime mix) - which does the same - moisture in never gets out. 

 

Def worth finding out if it's the pots holding water (very likely) - when we got ours fixed they guy put a 'Chinaman's bunnet' on it to let most of the water run off before it even got to the pot - but might not be the look you want!

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If the dummy pots are filling with water, then how about drilling drain holes in them right at the base, so the water can drain out over the flashing?

Edited by JSHarris

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7 minutes ago, jamiehamy said:

I concur - it's the quick and easy solution that causes more problems than it solves. They do that on sandstone tenements up here to stop moisture penetrating, but it always gets in and if it's been waterproofed, never gets back out causing more untold misery. The other sin is to re-point the walls using cement (rather than a lime mix) - which does the same - moisture in never gets out. 

 

Def worth finding out if it's the pots holding water (very likely) - when we got ours fixed they guy put a 'Chinaman's bunnet' on it to let most of the water run off before it even got to the pot - but might not be the look you want!

They could be cut down so they just project 5mm or so and spray paint them to match the pots. Deflecting the majority of the water away will solve most, if not all of the problem, as long as it's 100% deffo not getting into the chimney under the pots. 

@readiescards, what is under the pots? Does it have a slab or other as a closure plate?

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Has the lead not been bent up to form a lip around 3 sides so you make any water fall out onto the roof and into the downspouts. Looks like all yours is running down the gable wall.

The base for the pots should have been totally smoothed over with a concrete/motar mix and the pots filled the same so there could be nowhere for any rain to pool and work it's way down. 

Could the pots have moved slightly from wind or maybe not been seated properly and you have a gap between the pots and the motar/concrete and rain is getting in here. 

The longer the bricks are left wet then the more salt will come out and no matter how much you clean them it takes years to weather out. Will be a case of scaffolding back up and have a look at what's there and redoing.

Has the other chimney the same issue???

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1 hour ago, joe90 said:

I have a similar problem with my west facing wall, permenantly soggy ( well it has been such a wet winter/ summer). My builder ( who’s been brilliant) has suggested a water proofing agent on that wall ( when/if it dries out in the summer) he has done this many times in our location next to the Atlantic 😱.

 

I would wait until it dries out and apply a clear coating of silane / siloxane.  If you leave it wet, it may get damaged by freeze / thaw.

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6 hours ago, joe90 said:

My builder ( who’s been brilliant) has suggested a water proofing agent on that wall ( when/if it dries out in the summer) he has done this many times in our location next to the Atlantic 😱.

I have used a water repellent on an old porous brick wall many years ago. IIRC it was silicon based and worked a treat. You could see the rain beading on it for years after. Being a repellent it allows the brickwork to breath and it stays dry.

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