Hi All
Was not sure how to describe this issue but basically I removed the old rendering and discovered the wall is made up of several types of blocks and bricks as follows
1. very strong concrete blocks
2. very week brcks
3. very weak concrete blocks 'the darker coloured ones'
the wall is a cavity wall but with very small spacing and the other side of that wall appears to be normal bricks, the internal wall however has this weird mix, some images below
the block below is the weaker concrete, i even saw some glass in it, the ones below it are much much harder blocks
so my questions are as follows
1. should I replace those weak, weird looking blocks and if so what would be the best approach ?
2. what is the best thing to use to fill those large holes or space like in the image above ? expanding foam ?
any help or advise is much appreciated!
Was not sure how to describe this issue but basically I removed the old rendering and discovered the wall is made up of several types of blocks and bricks as follows
1. very strong concrete blocks
2. very week brcks
3. very weak concrete blocks 'the darker coloured ones'
the wall is a cavity wall but with very small spacing and the other side of that wall appears to be normal bricks, the internal wall however has this weird mix, some images below
the block below is the weaker concrete, i even saw some glass in it, the ones below it are much much harder blocks
so my questions are as follows
1. should I replace those weak, weird looking blocks and if so what would be the best approach ?
2. what is the best thing to use to fill those large holes or space like in the image above ? expanding foam ?
any help or advise is much appreciated!