Improving ventilation under suspended ground floor

[charlieB]

In process of buying 1920's detached house. Original part of house has suspended wooden ground floor, 20 year old extensions on south and east sides are solid floor, leaving 4 airbricks on North wall and 2 on west wall to provide ventillation under original floor.

Following full structural survey, Surveyor's advice is to make the rest of the ground floor solid as well - don't really want to do this on grounds on cost and disruption - and reckon that its overkill as well.

Current state of underfloor timbers cannot be inspected at present, but there is no real flex in the wood floor.

Does anyone have ant experience of pumping air under the floor to maintain air movement - thought is to pump air into the South East corner, "positively pressurizing the underfloor area forcing air to exit via airbricks in North and West walls.

Any better ideas?

thanks Charlie

[Cicero]

========================= Ducting to the 'dead' areas either from existing or new air bricks. This wouldn't need any pumping other than the natural air flow.

Cic.

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[fred]

In article , charlieB writes

Unless your surveyor has poked his nose under the floor and sniffed a problem I think he is being excessively picky. I live in a corner property built around 1900 which has no ventilation on the west and north facing walls but 5 airbricks or so between east and south which provide plenty of ventilation for the whole underfloor. In your case, if there are appropriately placed gaps in the underbuilding, air will pass from West to North via the South East corner and there will be no stagnant air, the wind is the pump. That said, you do need to check that there are openings in the underbuilding to permit this kind of movement so that means exploring the underfloor, while you're there, your nose will tell you if there is a damp problem.

[normanwisdom]

If there isn't a problem showing there may not be one. Your surveyor is covering himself (and advising you) just in case.

[meow2222]

If there is more than one external wall you can install more airbricks if necessary to get throughflow. If only one external wall is available you would need to fit cowls to airbricks, half pointing one way, half the other way, in order to get wind flow to cause air flow underfloor. Its hard to imagine how wholesale replacement of floors could be appropriate advice.

NT