Injected damp course ball park needed

I bet it doesn't have rising damp at all.

Usually there is a simple maintenance problem that needs a cheap fix. Usually it is the damp proof course being breached by earth, a driveway laid right up to the wall or walls rendered too low and over the DPC.

Or there is no problem at all, no evidence of damp but the surveyor's damp detector (which doesn't measure damp at all, but conductivity) gets a reading and suddenly there's a problem.

Have a look at the Heritage House website.

There is a whole expensive and messy sector of the industry that feeds off people's lack of knowledge.

mariat wrote: »

It's a period property so no damp course, also the interior, as well as exterior, walls are affected.

Period property ?
Is this a listed property, in which case, you will need to talk to the local Conservation Officer before doing any work.

If it isn't listed, then you have free reign to do pretty much anything - Not all work recommended by surveyors and damp proof "specialists" will be required. Depending on the age of this property, the damp proof course could be anything from a thin bitumastic felt layer, a layer of slates, a course of engineering bricks. Depending on where in Norfolk, the lower section of the walls could be flint which is impervious to water.

The one thing you do NOT want to be doing is repointing with cement mortar, rendering the outside with cement (or K-rend), and using waterproof plaster (or gypsum) internally. Traditional materials such as local chalk, sand, and lime will be your friends. If you need advice & assistance with period properties, have a chat with Philip Hendry & Sons, Dereham, NR20 5RT or look up Mike Wye in Beaworthy.

If you do get conned in to injected DPC along with waterproof renders & plaster, expect to be stripping it all out again in 10 years or so and fixing a whole raft of other problems.