Edward Thompson

Tue 10 Mar 2015 06:37am

Hi John as previously stated dry rot is a very serious problem and can spread throughout the whole house if not treated, but it may just be wet rot that has dried out. The problem with filling the void with concrete is you may be blocking air vents to the floors in the rest of the house, if the ground floors are timber you will have vents, cutting of the air flow can cause dry rot ! Get someone in to check the type of rot and probably best to replace with treated timber joists, also check that the DPC has not been bridged by paving etc. Ed

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john cunningham

Tue 10 Mar 2015 06:23am

Make sure it's not dry rot by getting a specialist in. He should give you an estimate free of charge. If it's dry rot you need to get it sorted immediately. It may be wet rot in which case you have got much less of a problem. Just have it replaced making sure you stop the source of the water that is rotting it. Concrete or timber ? It's just a matter of personal choice. Just make sure whichever you choose that it's well insulated and has a damp proof membrane ( if it's concrete) and if it's timber that the ends of the joists are wrapped. Jcunningham

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Arvils Porietis

Wed 11 Mar 2015 09:08am

If you are to keep the floorboards, I would suggest changing joists ( ensuring they are pre-treated and DPM at ends where in contact with brick/concrete) . The joist replacement will be quicker job as concrete needs to set .

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STEVEN McCALLUM

Tue 10 Mar 2015 12:41pm

I would fill it as it's a lot cheaper,wood is expensive and it rots in humid conditions concrete doesn't

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