Hello all. Very helpful site.
Have a question regarding digging out, or not as the case may be - seen similar questions, but none really answers my specific query:
is it ok to have and old concrete path running through the middle of the subbase? I.e. with a flexible construction, is a non-flexible thing like this in the subbase going to mean different settle characteristics of the surrounding areas?
Different sub base materials in same area
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monty28
- Posts: 12
- Joined: Mon Feb 16, 2004 6:38 pm
- Location: castleford
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84-1093879891
Sorry for delayed response - been in Ireland for a few days.
Actually, I'd rip out the solid concrete path, as, regardless of how well you consolidate the granular sub-base material to either side, there will always be a degree of what is known as "Differential Settlement" between the paving overlying the old concrete path and that laid on top of the granular material. Given sufficient time/trafficking, you would be able to identify the position of the old concrete path beneath the new paving, as that will settle less than that paving laid over the sub-base material.
Of course, if you're not worried about this type of thing happening on your own driveway, and you don't fancy scrapping with a lot of rock-hard concrete, you could leave the path in place and try to get the new sub-base (on either side) to consolidate as best as possible. It's unlikley that tghe driveway would ever become unusable if you followed such a plan, but it wouldn't look 'right'.
I'm a stickler for perfection (or as near to perfection as can be achived by mere mortals) and so I'd prefer to hoy it out, but the choice must be yours. I'd be interested to hear which route you choose. :)
Actually, I'd rip out the solid concrete path, as, regardless of how well you consolidate the granular sub-base material to either side, there will always be a degree of what is known as "Differential Settlement" between the paving overlying the old concrete path and that laid on top of the granular material. Given sufficient time/trafficking, you would be able to identify the position of the old concrete path beneath the new paving, as that will settle less than that paving laid over the sub-base material.
Of course, if you're not worried about this type of thing happening on your own driveway, and you don't fancy scrapping with a lot of rock-hard concrete, you could leave the path in place and try to get the new sub-base (on either side) to consolidate as best as possible. It's unlikley that tghe driveway would ever become unusable if you followed such a plan, but it wouldn't look 'right'.
I'm a stickler for perfection (or as near to perfection as can be achived by mere mortals) and so I'd prefer to hoy it out, but the choice must be yours. I'd be interested to hear which route you choose. :)
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77-1093879623