Hi,
Damp is always a problem and seldom easy to get rid of. What a shame you can't access the other side of the wall Dave which might have helped a great deal.
Our bungalow has caused us a lot of grief over the years; six weeks after moving in water was pouring through two ceilings when it rained which it often does here in Yorkshire; it took 18 months to save enough money to buy materials because the insurance company stated it was lack of maintenance? We installed the new roof ourselves. Then came leaks a big one ending up with a pond under the front room floor and leaks in the garage. It just went on and on causing us a lot of misery but now everything is dry but it hasn't been easy.
The water leak flooding under the bungalow was a failed wall to foundation mortar joint; I raked out the joint and repointed but then I ran a course of engineering bricks right along the joint to seal it once and for all; next I bought a cement mixer and created a channel as seen this to catch under patio water and allow it to discharge into the side garden; whilst the flags were up I might as well replace all the drains.
Another picture of the channel under construction; the concrete base is 4" thick; I only want to do this job once and then forget it.
Problem after problem besets us living here; above is a picture of the motor mounting bracket on the brand new cement mixer.
Here's the faulty mortar joint.
Who would guess what lies beneath.
Please see another problem solved; for years we suffered blocked up drain hoppers full of leaves and slimy slugs smelling awful; I came up with this idea to replace the hoppers whilst I was installing the new drains; no more hopper cleaning or bad smell; the 4" drain is terminated with a plastic end cap made to accept kitchen outlets and the gutter fall pipe. Works a treat.
My answer to a broken bracket; make a new bracket this one out of Whale Tufnol.
I appreciate leaks and damp can be a real headache but I'm not happy covering such things up preferring to sort the problem once and for all; this one job involved many weeks of heavy work doing everything on my own with my lovely wife keeping the mugs of tea and biscuits in plentiful supply for me.
I kept the cement mixer for six weeks then sold it on only losing £20; it was still like brand new because I look after all my kit.
Good luck Dave I'm sure its causing you lots of frustration.
Kind regards, Colin.