Disclaimer
The opinions expressed herein are my own personal opinions and do not represent anyone else's view in any way, including those of my employer.
© Copyright 2010
The opinions expressed herein are my own personal opinions and do not represent anyone else's view in any way, including those of my employer.
© Copyright 2010
When repointing the brickwork, any cracked units should also be removed. This will ensure that the finished work looks good. The mortar mix to be used should be in the ratio of one part cement and two parts sand. Since this work is a repeat, the sand should be sieved with a gauze wire to make it fine. The existing brickwork wall should also be checked for other defects before chipping out the loose mortar. This defects include vertical or horizontal cracks.
Repointing work commences by removing the old mortar with a grinder or chisel. This is done about half to three quarter inch deep. It is important to ensure any cracked mortar is removed and brushed off. A rounded steel bar of half an inch is used for the pointing. Once the dried mortar is removed and brushed off, the wall is adequately watered. This should be done continuously for one hour. After watering the whole surface then the repointing can commence.
The repointing mortar is mixed and applied to the open joints. The mix should not be very soft nor hard. A trowel is used for putting the mortar carefully into the joints. The round bar is then used to key in the mortar firmly in the joint. The mortar should be allowed to splutter onto the brick wall. A hand brush is used to remove the excess mortar. The process is repeated on the whole wall surface. After completion, the wall is watered after twenty four hours for one week.
Andrew Karundu Is A Building Economist, Providing Home Based Solutions To Fixing, Repairing, Remodeling And Redesigning Homes. He Uses Simple Tried And Tested Methods To Improve Family Lifestyles.Visit His Site Here For Adequate Information On Most HOME IMPROVEMENT SOLUTIONS.
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Under no circumstances use pva on a mortar for outside the building unless you use the waterproof type ( even then the jury is still out as to whether it is of any use or just an added expense). Your standard pva turns to a gel in extremely wet conditions, even when mixed into a mortar, that will break down the mortar if it freezes. it is bad enough repointing a house once without having to redo it again 5 years down the line.