Fixing those will be cheap - and better than a chemical DPC. I'd love to know just how well a chemical DPC works in practice without rendering the inside of the wall to a height well above any rising damp...
Actually it was perfect. The problem was they hasn't injected the internal walls and especially the central chimney.
and with a suspended floor and plenty of ways for water to run UNDER the house...
If the brick is soft and permeable enough to have a damp problem the chemical is effective..very effective. You inject below floor level and then simply plaster over the holes.
I think the problem is made worse if an impervious finish is put on the wall.
Some years ago a local damp proofing company was prosecuted by Trading Standards. For years they had apparently been using water instead of the damp course fluid. Apparently they had had financial problems and could no longer afford supplies so thought if they used water it would at least allow them to get paid, improve cash flow and come back and fix it after the owner complained.
No one complained, so they carried on using water for many years without any complaints until an ex-employee raised a fuss with TS. When TS investigated they could 't find a single dissatisfied customer. Indeed all said how well the work had been done with all the weeds and soil cleared away from the walls so they could drill the holes and everything left clean and tidy afterwards.
snip
Bless those old Pros... er crooks
Jim K
It can fail if the slates crack, they are quite brittle.
Its called Quite Interesting, not Quite Intelligent. Simon.
Quite.
Alan Davies plays the fool to King Stephen.
And they had Sarah Millican on which goes to demonstrate that brains of any sort are not a requirement.
Then you'd have localised rising damp.
Who says their team of researchers have any knowledge of building process or technique. It seems entirely plausible they would find the quote from the RICS chap and assume it can be taken at face value.
But a crack in a slate doe not make a whole wall wet... you may get a patch adjacent to the crack.
One of these days I'm going to fill a metre long section of soil pipe with chalk, stand it in a bucket of water, and see how far above the water line the damp rises. Any estimates anyone?
If you mean to leave the soil pipe around the core,then quite a way. But if you are casting the core and then removing the pipe, not very far. I think that evaporation from the material is an important factor.
Well how high is an oak tree? The water gets all the way up that. Or a sequoia.
harry posted
It's drawn up by transpiration.
That would imply that the release of a single molecule of water at the top of a tall tree would require *more* energy than at the top of a blade of grass. (Or, avoid differences between plants, a sapling of same species.) Because the transpired molecule from the tall tree has to draw up far more water from ground level than does the one on the blade of grass. Basically a chain of water molecules stretching from top to bottom of the tree/plant has to rise by one molecule. And the energy has to come from somewhere.
so is it in a brick wall :-)
Ok, so we'll leave the chalk in the pipe and cover the top to prevent evaporation. Quite a way you say? Rising damp apparently only gets to 1 metre, so maybe we'll need a longer section
I just can't keep up with the takeovers and mergers of the utilities since privatisation, did they used to be Veolia?
G.Harman
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