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Posted: Mon Aug 02, 2010 2:14 pm
by michaelthegardener
Ive been asked to repair a wall that used to have a row of petal blocks on the top he wants it re done with plain blocks but higher than before he wants it to be around 4 foot but im worried this will be to high ? ??? will it ? or is it just to risky to do it not knowing how good the footings are ???
Posted: Mon Aug 02, 2010 2:30 pm
by GB_Groundworks
cant you dig down at teh back etc and inspect the footing if its 100mm concrete you'll be fine, might be laid on a spread brick if its an old wall or for dwarf walls seen them laid direct on concrete block laid flat.
Posted: Mon Aug 02, 2010 7:15 pm
by lutonlagerlout
what happened to the petal blocks?
bear in mind these let the wind through whereas noraml blocks wont
the footing needs to be 20% of the walls height
so if its a 1200 high wall you would expect 240mm of concrete
roughly a shovel depth or spit
dont forget that a block alone is not enough,you will need coping stones and these need to be laid with a bond bridge ,I.E> SBR in the mortar and applied to the copings before laying
cheers LLL 
Posted: Mon Aug 02, 2010 8:12 pm
by michaelthegardener
i should have taken a pic i cant dig down as its between 2 drives thats what happened to the petal blocks ! the idiot next door hit it but the rest of the wall is solid as far as i can tell by pulling on it as hard as i can !
thanks for the info on the SBR ill get some
Posted: Mon Aug 09, 2010 10:08 pm
by michaelthegardener
did this sat afternoon i was assured the footings were good enough and i built it 3 blocks high with copeing forgot me camera though
Posted: Mon Aug 09, 2010 10:16 pm
by mickg
use the camera on your phone ???
Posted: Mon Aug 09, 2010 10:19 pm
by michaelthegardener
yeah but its crap quality ??? its a samsung solid :p