Air bricks above damp proof course?

[avantasia]

I recently bought a 1920/30 bungalow with a suspended wooden floor. I suspect there is a minor issue with damp in a couple of the rooms that I'd like to sort out before I recarpet the rooms. Looking outside I see that the air bricks are above the bitumen damp course but appear to be below the level of the suspended floor. Two of the bricks I can poke a stick deep into it so clearly going through under the floor but the majority appear to be only allowing air into the the cavity.

I thought all air bricks should be under the damp course to allow air to circulate beneath the suspended floor?

[Someone-Else]

I am NOT a builder, but my house has a suspended floor. From under the floor where there is an air brick (several of them all the same layout) There is no brick inside. Cavity wall, but on the inner wall if air brick outside, no brick inside (just the one) so I can see daylight from inside. (Yes, from under the floor)
Have you tried looking from inside to out? (might be some rubbish in the way) Can't tell where the damp course is, its all the same colour.
Where is the damp? I thought the air bricks were for the floor, not the room?

Have you considered one of these Click me Surprising how useful they are

[dewaltdisney]

They can be either above or below the DPC. In older houses with suspended wooden floors, the object is to allow a gentle through flow of air under the floor to keep the timbers in good order. So you need to ensure that the vents at the from and back are clear to allow this airflow. Some air bricks have a fly screen type mesh so look closely.

DWD

[avantasia]

I am NOT a builder, but my house has a suspended floor. From under the floor where there is an air brick (several of them all the same layout) There is no brick inside. Cavity wall, but on the inner wall if air brick outside, no brick inside (just the one) so I can see daylight from inside. (Yes, from under the floor)
Have you tried looking from inside to out? (might be some rubbish in the way) Can't tell where the damp course is, its all the same colour.
Where is the damp? I thought the air bricks were for the floor, not the room?

Have you considered one of these Click me Surprising how useful they are

That endoscope does look pretty useful and not too expensive. Thanks.

These air bricks are below the floor level but I thought they'd be a bit lower. I can't look from in to out without pulling up floorboards, though at some point I will be re-carpeting the house so at that point I will also address some of the floor boards which seem to be a bit lumpy and at the same time probably look under the floor as well. The damp is minor, in the corner of one of the rooms and I only noticed it when we had particularly heavy continuous rain late December. No mould, the wall just felt damp. Also another room the TV socket just above the skirting board is rusty and a fresh coat of paint has flaked off above it.

[avantasia]

They can be either above or below the DPC. In older houses with suspended wooden floors, the object is to allow a gentle through flow of air under the floor to keep the timbers in good order. So you need to ensure that the vents at the from and back are clear to allow this airflow. Some air bricks have a fly screen type mesh so look closely.

DWD

Thanks. could well be that air isn't circulating properly beneath floor.