hi
I’m looking for advice on getting an extension wall built that will be partially under ground. The current wall is a retaining wall as attached, which is about 800mm off ground level. The extension wall will be up to this height with windows sitting on top.
I have had a couple of builder provide their ideas, one suggested digging further in and create another retaining wall then leave a gap and do a cavity wall.
Another suggested when filling the foundations (500mm wide, 1 meter deep), fill all the way up to the desired wall height.
I personally have an idea of doing a standard insulated cavity wall and either double layer the outer wall or lay the blocks flat to gain additional strength. The outer layer would then be ground level or slightly lower than ground level to fit a drain.
To complicate the matter I also need to fit air vents from top of this wall to circulate air back to the existing suspended timber floors. Not yet figured out the best way, but was thinking of having the vent either go up the cavity, or inline with the middle layer of blocks.
Anyone has had any thoughts as to any of these, or suggest and better ideas? Any advice would be much appreciated. Thanks in advanced
I’m looking for advice on getting an extension wall built that will be partially under ground. The current wall is a retaining wall as attached, which is about 800mm off ground level. The extension wall will be up to this height with windows sitting on top.
I have had a couple of builder provide their ideas, one suggested digging further in and create another retaining wall then leave a gap and do a cavity wall.
Another suggested when filling the foundations (500mm wide, 1 meter deep), fill all the way up to the desired wall height.
I personally have an idea of doing a standard insulated cavity wall and either double layer the outer wall or lay the blocks flat to gain additional strength. The outer layer would then be ground level or slightly lower than ground level to fit a drain.
To complicate the matter I also need to fit air vents from top of this wall to circulate air back to the existing suspended timber floors. Not yet figured out the best way, but was thinking of having the vent either go up the cavity, or inline with the middle layer of blocks.
Anyone has had any thoughts as to any of these, or suggest and better ideas? Any advice would be much appreciated. Thanks in advanced