hello to the forum. I'm an occasional renderer, visit the forum regular and this is my first post looking for advice.Customer asked me hack off the blown areas of render off concrete block garden wall. Its been redone in past in s&c and cracked along the lines of the blockwork courses then leaked and blown in winter.
I like 4:1:1 and 6:1:1 and always thought the lime accommodated any slight expansion, but on recent visit saw cracks on a half brick thick garden stairwell I rendered about eight years ago. I'm no good with putty paddles but did use a lime and sand ready mix about a year ago to repoint, has anyone used this to patch walls. Thanks.
I like 4:1:1 and 6:1:1 and always thought the lime accommodated any slight expansion, but on recent visit saw cracks on a half brick thick garden stairwell I rendered about eight years ago. I'm no good with putty paddles but did use a lime and sand ready mix about a year ago to repoint, has anyone used this to patch walls. Thanks.