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PostPosted: Fri Oct 13, 2017 7:53 pm 
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Hi All,

I am hoping to help my daughter with her recently bought Victorian mid-terrace. The ground floor is bare floorboard on suspended beams above a four foot high 'basement'. It appears that the basement could be up to a couple of feet deeper but has been filled in with a layer of sand/dirt/cement droppings and loosely covered with what looks like permeable fibre sheeting. Some of this infill feels damp. All four underfloor walls have extensive powdering and efflorescence of the visible mortar, although they don't feel damp (at least, not now). The floorboards have shrunk slightly, as would be expected over 120 years, so cold air penetrates into the ground floor rooms, accompanied by a strong 'damp' smell. There are a couple of air bricks on each of the two external walls. The supporting beams all appear sound. So, my questions:

1. Should I remove the infill material to get back to bare ground (I'm sure that some of it is acting like a wick)?
2. Can I scrape off and then seal the defective mortar with a waterproof compound, or would that introduce other problems? Is it worth the expense?
3. Would aluminium bubble sheet attached across the undersides of all supporting beams be sufficient for insulation/smell reduction, or should I also use e.g. rockwool between the beams?

Most grateful for your suggestions and advice!


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PostPosted: Fri Oct 13, 2017 11:05 pm 
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if you go back an read some of the previeous posts on these issues youl get the hang of thingsfrom earlier advice.
can you get under the floor an move around. how high is the outside ground?
use a probe to seeif where the joists sit in the walls if theyare rotten..
any wood material shpuld be removed from the soil.a membrane can be used to cover the damp earth.. you should have throug ventilation under the suspended floors an cellar.
is the any signs that a stairway used to lead down to a full cellar?

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