Damp patches on walls in new house

[LFC Murphy]

Hi,

Firstly I know that the weather has been wet (understatement) lately, however a while back I asked about slight damp patches I noted while tiling, say around the patio door.

Now however these have grown and have started moving up the walls. We were sitting down for dinner the other nite and I noted shadows, which turned out to be a damp patch half way up the wall beside the patio. On further inspections I noted more

1. Damp running along the top of the skirting board on the gable end of the kitchen wall next to the patio.
2. Damp just inside the PVC utility door (Next to the patio door)
Also I've noted that water accumulates on the step outside which would affect one side of the patio door and the utility, however I cannot see the same on the other side except water acculates in the alleyway beside the gable but does not touch the wall?

3. A large damp patch in the utility next to and encroaching on the ceiling.
Regarding item 3 I am 99% sure that the drain from the ensuite toilet runs directly above. And we had a severe blockage a few weeks ago. Could this have caused a seal to break?

Am I missing something here, shouldn't a damp course prevent this?

Thanks,

 

[millertime]

Dampness is a common theme in the last few weeks, the damp course should prevent it from rising but check to see if it is running down the wall anywhere, the problem is if your house is facing west the gales are driving the rain up under the lead or even the windows. Not an easy problem to fix, a friend of mine (who is a builder) has after 3 yrs not succeeded in finding where the water is coming in!