We've just had an extension built and I'm a bit of a worrier and would appreciate some thoughts from others in the know.
Our damp proof course was laid higher on the outside of the cavity wall than the inside of the cavity wall (due to levels within the existing house). The thing that is worrying me is that this means that the air bricks (we have a suspended wood floor) are below the dpc on the outside of the cavity wall but sit above the dpc on the inside of the cavity wall. What concerns me is that damp could travel into the air brick (terracotta) on the outside of the wall, through the air brick and then up into the wall above the dpc on the inside cavity wall.
I asked the builder at the time but he just said not to worry but that's not good enough for me. Are my worries well-founded or am a worrying too much?
Also the bricks below the extension dpc are currently saturated. Is this normal - it doesn't seem to be the case in the rest of the house?
The builder has laid paving right up to the extension. Mostly this has a very slight slope away from the wall so that the rain runs off but in a couple of places he's not got it quite right and after heavy rain there's a shallow pool of water (say half a cm) up against the bricks. Will this cause any harm and should I get him back to fix it?
Thank you.
Our damp proof course was laid higher on the outside of the cavity wall than the inside of the cavity wall (due to levels within the existing house). The thing that is worrying me is that this means that the air bricks (we have a suspended wood floor) are below the dpc on the outside of the cavity wall but sit above the dpc on the inside of the cavity wall. What concerns me is that damp could travel into the air brick (terracotta) on the outside of the wall, through the air brick and then up into the wall above the dpc on the inside cavity wall.
I asked the builder at the time but he just said not to worry but that's not good enough for me. Are my worries well-founded or am a worrying too much?
Also the bricks below the extension dpc are currently saturated. Is this normal - it doesn't seem to be the case in the rest of the house?
The builder has laid paving right up to the extension. Mostly this has a very slight slope away from the wall so that the rain runs off but in a couple of places he's not got it quite right and after heavy rain there's a shallow pool of water (say half a cm) up against the bricks. Will this cause any harm and should I get him back to fix it?
Thank you.
