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I am the highest up of 4 terraced houses, on the end. There was no AAV fitted on the stack in question when I moved in, it opened into the attic. Another stack on the other side of the house vents through the roof.

I’ve bought some manhole keys, will get a mate to help lift it. I think the sewer goes along the back of 4 houses, and I know the last one (lowest) has had problems with blocked drains. Would I need special equipment to unblock the drain or can I use a hose?

I’m still thinking maybe the AAV isnt working great because there are no gases in the bathrooms when its taken off, attic stinks though

my first problem is that one manhole at street level out front is partially concreted over, and the second , one floor down from street level , out back is too heavy to lift, its got inset slabs ,and i couldnt get a crowbar under it . And what do i do if there is a blockage?

That doesn't happen

But when I flush the toilet, the water level in the p traps moves down , not up

Sorry what am I looking for and why?

I have a bathroom above a shower room, sharing a soil stack. When I moved in there was a bad smell in the attic and black mould above the soil stack which was venting open into the attic. This didn't seem right so I fitted an AAV in the top. However, since then there is a bad smell in both...

They used spax screws so it shouldnt have jacked up? It does feel a bit like the board is coming slightly off the joist though, but equally it could be the joist is twisted a bit, they were in a bit of a state and had to be cemented into the wall properly

Do you mean 50mm?

There are 4 across the boards at the moment so putting in 3 more screws makes 10cm spacing (4 inches), is that too close?

I took out 4 screws on the most squeaky board and it was just as bad if not worse

Im pretty sure there are no services along that joist, I had a look when the floor was up. Can too many screws weaken the board? 10cm spacing ok?

Is it worth putting in extra screws? There are only four screws across the 600mm span. Could I put them every 10cm instead of 20cm, or could that weaken the board?

This floor was replaced recently because the joists were not level and the boards were in poor condition. The joists have been levelled with additional timber, and the new 22m chipboard is glued and screwed in place (although in this room I can’t see as much glue in the cracks, i think they must...

Any ideas?

I’d like to upgrade my patio with flagstones of some kind. Currently its concrete pavers layed onto grey gravel and probably sand. In the area highlighted top right the patio has sunk by up to 10cm. There is a sleeper retaining wall at the top and right. I want to extend the patio all the way...

One more thing my house builders did wrong…

Well that will be the only place in the house where theyre not buried

So in the shallowest bits you mean use foam cover the pipes cut it back and then fill the face with something - what would you recommend to fill the face of the foam?