Removing flemish bond

irishpaving · Post: # 65911Post **irishpaving** Fri Jul 08, 2011 9:34 pm

How much brickwork could be removed from a flemish bond wall at a time in order to fit new dpc.

Irish

digerjones · Post: # 65917Post **digerjones** Fri Jul 08, 2011 9:59 pm

i would say a metre. if you take a metre out at bottom, then next coarse up take 1 less brick out and so on up. you end up with a hole shaped like a triangle. the bricks will stay up on there own, this is the rule of thumb i use. have you looked if theres any other reason the building is damp or is it a customer who want a dpc because his property has'nt got one. hope this helps

Fri Jul 08, 2011 10:02 pm

i s it 9 inch or single skin?
when i have done it i normally take out 4 bricksand lay the DPC then lay 3 back and point the top in with a small pointing tool as i go,on each brick so they are packed
the secret is to always leave at least 100mm lap of dps showing for the next hole
its a slow and tedious job colm but works much better than injecting silicon
LLL

irishpaving · Post: # 66044Post **irishpaving** Tue Jul 12, 2011 5:38 pm

It's a 9" wall which they have previously tried the injection treatment which hasn't really improved anything or has been done a long time ago. I did notice that the injections were drilled directly into the brick. I could be wrong here but i thought it would normally be injected into the joints.

Colm

Tue Jul 12, 2011 6:08 pm

no it is normally the brick they inject into
me and my mate did his whole bungalow over 4 weekends
very slow and tedious and you need to pack the muck back in tight
but it works
LLL

henpecked · Post: # 66048Post **henpecked** Tue Jul 12, 2011 6:15 pm

Didn't they used to 'slide' slate down the sides of the wall many moons ago?

Tue Jul 12, 2011 6:20 pm

yes and do a french drain too hen
total fail
LLL

joydivision · Post: # 66053Post **joydivision** Tue Jul 12, 2011 6:50 pm

You can inject into the mortar joints, with DryZone type stuff, thats intended for the joints. That product is fairly recent though. The traditional injection method with the machine and rods you insert in the wall should be done in the brick itself as LLL mentioned.

JD

ringi · Post: # 66499Post **ringi** Mon Jul 25, 2011 9:23 pm

Have you positively confirmed that the problem is not condensation due to the bottom of the wall being colder than the rest of the wall and poor ventilation?