Hi,
I was advised to install an airbrick into our external wall to ventilate the area beneath a suspended tiber floor. I have stripped off the render in the area where the airbrick is to be installed. Unfortunately the course from which I have to remove a brick is where the chemical damp course has been injected. (the holes in the brick indicated this). I cannot go up a course as it will be too high and will penetrate the wall at the internal floor level. I cannot go down a course as it will be at the finished external floor level and will probably allow surface water through the airbrick.
How do I install the airbrick without compromising the chemical DPC? Are there any additives I can mix with the mortar I use to fit the airbrick which will prevent damp rising around the airbrick?
Any advice would be really appreciated as I do not want to make a costly mistake.
Thanks,
MC
I was advised to install an airbrick into our external wall to ventilate the area beneath a suspended tiber floor. I have stripped off the render in the area where the airbrick is to be installed. Unfortunately the course from which I have to remove a brick is where the chemical damp course has been injected. (the holes in the brick indicated this). I cannot go up a course as it will be too high and will penetrate the wall at the internal floor level. I cannot go down a course as it will be at the finished external floor level and will probably allow surface water through the airbrick.
How do I install the airbrick without compromising the chemical DPC? Are there any additives I can mix with the mortar I use to fit the airbrick which will prevent damp rising around the airbrick?
Any advice would be really appreciated as I do not want to make a costly mistake.
Thanks,
MC