Frost damaged bricks

Question

A whole course of bricks below damp proof is showing signs of frost damage with the facing broken off. Is the strenghth of the bricks endangered and what is best course of remedy?

Wayne · Answer

Take down and replace the brickwork with new brickwork

James · Answer

Sounds like the bricks have blown over a period off time through water ingress and damp they need chopping out and replacing

Roy · Answer

The only way would be to render below damp course back jack first then put a render plinf

Craig · Answer

Yes the strength has been compromised. Over time the moisture expanding and contracting in the bricks would have caused this. Only way to correct this is by replacing the bricks.

Christopher · Answer

The best remedy is to cut out the damaged bricks and replace them

Robert · Answer

Without seeing the actual damage. I can only base my answer on my experience. 
Most bricks are porous meaning over a long period of time they soak up water.
During the winter the cold causes the water to freeze.  Ice expands, this causes the bricks to become brittle and the face surface of bricks flake off. Known as blown. This offence happens where the water has built up in specific area. Like below DPC or tops of walls. 
To remedy I would suggest removing the damaged bricks and replace with new ones. Once dried treat with a water repellent sealer.

I trust this answers your question.  
Regards Robert

Alan · Answer

Remove old damaged brick and replace with a low absorbent type of brick. i.e a enginnering type brick would be best suited with a 4:1 sand and cement mix. If you use a more water absorbent brick then it would be wise to place the brickwork with a water repelant coat of Johnsons water seal or similar

Matthew · Answer

Hello Frank hope your well mate! Through experience this is normally caused by weather damage or possibly a leak. Obviously the bricks are being exposed to water constantly or at certain its frequent. Advice would be to knock the old bricks out, source your problem then replace all old and problematic bricks. Once its gone its gone so replace is probably the best thing. make sure that you check your damp course as well because you don't want another problem! ATB, Matt.

Nerijus · Answer

Hello, 
Yes, if a whole course of bricks below the damp-proof course (DPC) is showing signs of frost damage, with the facing breaking off, it can indicate a loss of strength and durability.
 Bricks in this area are particularly vulnerable to moisture and frost damage because they are in direct contact with ground moisture and experience freeze-thaw cycles.
Nerijus

Frost damaged bricks

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