white patches on brickwork

Question

Do white patches on outside brickwork of house mean that water is getting in behind bricks and making walls damp? Could it be  guttering is not aligned properly or not deep enough under roof tiles to take water into down ?  The wall above bedroom window has shown water/condensation running down
and black mould around window frame has recently been removed.

Roof also been dripping water so could be leak or very bad condensation. 

Sound advice much appreciated on what to do next. Thank you.

Anthony · Answer

No I don't think it's water whit patches are usually the salt in the brick I see this a lot on new build houses.it sounds like you need to get roof sorted as will only male problems worse

Neil · Answer

the white is salt cominout of the bricks. very common on new builds easy to remove. will weather of over time on its own.ive built houses on sites were we used full cavity insulation batts and this has made bricks covered in salt.

John · Answer

White patches on brickwork sometimes accures when salt is comming out of the bricks this can be remedied quite easy wait until dryer weather and treat areas with a brick acid.   Take care when using this product and read instructions before use.  
Good Luck

Ian · Answer

White on bricks is salt  coming out.   
Brick acid will  sort it

Zorlu · Answer

Check if there is enough ventilation and check the gutters for blockages or damage

Simon · Answer

White patches on masonry are something called efflorescence which is basically salts in the wall 
That have been brought to the surface. Rain, dripping water and internally wetting them may appear to resolve the issue but actually just sends them back inside to resurface at a later date. The correct way to remedy is to brush them off.

Obviously a leaking gutter or down pipe will need to be rectified as over time this will degrade the wall it travels down for obvious reasons. Cleaning out the gutters should be done as a minimum or at least checking them to see if the flow sufficiently, check in a rainy day again for obvious reasons! 

Mould in the room will be due to lack of airflow combined with the condensation that is building up due to older single glazed/inefficient windows and cold spots around the window reveals if they are not insulated sufficiently

Mark · Answer

Hi there this is known as Efflorescence, caused by moisture within the brick.  Could be due to moisture inside the cavity, rising damp or water on the external face soaking into brick.  Finding the cause will rectify the problem.  It will not affect the durability of the brick.  Is this a new problem?  Is it a new house?  Trace the water back to its source then go from there.

Daryl · Answer

It means Efflorescence of the brick in small words salts get drawn from the brick to the surface then dry a white chalky stain appears  . If its new brickwork could of been layed saturated and wet .
Condensation on roof felt is a common thing I've seen much off . Best thing to do is just check there no holes in brickwork or roof first . Then I would wait for summer to dry out properly.  Get the caulk removed shouldn't come back . Also you can always sill your brickwork after the drying process.  Thanks 
Daryl 
Kirks building services

Leigh · Answer

The white patches on brickwork is a salt deposit called leaching

Cam · Answer

It’s the salt escaping from the bricks. It will disappear within a couple of months.

white patches on brickwork

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