Chemical Injection DPC

Doozergirl

Some bedtime reading:
https://www.heritage-house.org/damp-and-condensation/managing-damp-in-old-buildings.html

https://www.heritage-house.org/damp-and-condensation/the-fraud-of-rising-damp.html

neilmcl

Verb said:

I'm fine with getting the DPC done and I did my research as the ground in my surround area is very damp and it has to do with an old brook that was rerouted when roads where built up 90 odd years ago. The ground still likes to hold the water.
Thanks for all the wonderful comments about, Its a con and total rip off and that is really what I want to be reading from all the construction experts.
My only question is, is my chemical injection 1 course too high. As I want to see what constructive comments there are that may or may not agree with what is in my head.

You've had constructive comments, the simple truth is it simply wont work no matter where it's injected.

There's no such thing as rising damp, it's simply a myth. Damp either comes from condensation due to poor airflow inside the house or penetrating from an external source such as a leak. Your house has survived without issue for 90 years despite of the ground "holding water".

stuart45

Verb said:

My only question is, is my chemical injection 1 course too high. As I want to see what constructive comments there are that may or may not agree with what is in my head.

I would say that's it's probably too high if it was put into the bed joint. DPC normally goes under the door frame and level with the slab. I never actually installed a chemical DPC, only physical ones when building.

shinytop

neilmcl said:

Verb said:

I'm fine with getting the DPC done and I did my research as the ground in my surround area is very damp and it has to do with an old brook that was rerouted when roads where built up 90 odd years ago. The ground still likes to hold the water.
Thanks for all the wonderful comments about, Its a con and total rip off and that is really what I want to be reading from all the construction experts.
My only question is, is my chemical injection 1 course too high. As I want to see what constructive comments there are that may or may not agree with what is in my head.

You've had constructive comments, the simple truth is it simply wont work no matter where it's injected.

There's no such thing as rising damp, it's simply a myth. Damp either comes from condensation due to poor airflow inside the house or penetrating from an external source such as a leak. Your house has survived without issue for 90 years despite of the ground "holding water".

What's a DPC for then?  I thought it was to stop moisture (aka damp) from the ground, well, rising up into the walls.  Not trying to be clever, just curious.

Doozergirl

shinytop said:

neilmcl said:

Verb said:

I'm fine with getting the DPC done and I did my research as the ground in my surround area is very damp and it has to do with an old brook that was rerouted when roads where built up 90 odd years ago. The ground still likes to hold the water.
Thanks for all the wonderful comments about, Its a con and total rip off and that is really what I want to be reading from all the construction experts.
My only question is, is my chemical injection 1 course too high. As I want to see what constructive comments there are that may or may not agree with what is in my head.

You've had constructive comments, the simple truth is it simply wont work no matter where it's injected.

There's no such thing as rising damp, it's simply a myth. Damp either comes from condensation due to poor airflow inside the house or penetrating from an external source such as a leak. Your house has survived without issue for 90 years despite of the ground "holding water".

What's a DPC for then?  I thought it was to stop moisture (aka damp) from the ground, well, rising up into the walls.  Not trying to be clever, just curious.

Have a read of the links I posted above.  

neilmcl

shinytop said:

neilmcl said:

Verb said:

I'm fine with getting the DPC done and I did my research as the ground in my surround area is very damp and it has to do with an old brook that was rerouted when roads where built up 90 odd years ago. The ground still likes to hold the water.
Thanks for all the wonderful comments about, Its a con and total rip off and that is really what I want to be reading from all the construction experts.
My only question is, is my chemical injection 1 course too high. As I want to see what constructive comments there are that may or may not agree with what is in my head.

You've had constructive comments, the simple truth is it simply wont work no matter where it's injected.

There's no such thing as rising damp, it's simply a myth. Damp either comes from condensation due to poor airflow inside the house or penetrating from an external source such as a leak. Your house has survived without issue for 90 years despite of the ground "holding water".

What's a DPC for then?  I thought it was to stop moisture (aka damp) from the ground, well, rising up into the walls.  Not trying to be clever, just curious.

The bottom courses of all houses will get wet at some point naturally in heavy rain and minor flooding but the moisture evaporates out long before it can travel up the brickwork, particularly internally. Damp proof courses have only been around since Victorian times and they were added as a secondary barrier just in case the rate of natural evaporation was slower than the uptake of water but this happening would be the exception rather than the rule. The reality is a damp proof course is rarely needed. Just take a look at any brickwork that's sitting in water, unless in times of flood you wont see a tidemark, indicating damp, much higher than the water itself. DPC is quite particular to house building in the UK, not many other countries use it and they don't have issues.

stuart45

People have been having arguments on the forums for years about whether rising damp exists.
I can say that working as a bricklayer abroad we are not the only country to use a DPC.  I remember Dutch bricklayers not bedding the DPC like we do in the UK. It's used in Belgium, Germany and the USA as well.
However there is no doubt that chemical damp proof treatments have been really mis sold over the past 40 or more years.
https://www.tudelft.nl/en/architecture-and-the-built-environment/research/research-stories/european-attack-on-rising-damp-in-buildings/