Remedial waterproofing and works can be complex.
We are often working on building's in all states of repair and requires maintenance. In our industry, most problems are in two categories:
- Substrate Correction
- Water Management
Remedial work often requires us to repair the substrate conditions - to either provide a more acceptable substrate or as part of the process in managing the water issues.
Remedial works may not solve the reason why water is entering internally. More often its a case of managing how its entering and the associated problems.
We are able to provide processes such as :
Concrete Crack Injection
Movement stress in buildings may lead to deep concrete cracks - which can be a concern for long term structural strength.
Remedial action can be taken where we can use High pressure or low pressure pumps and system to inject epoxy resins into the crack areas to correct the weakness in the slab and provide some structural integrity.
There are many types of cracks and may types of products we can use to repair these cracks. Form high strength repair mortars to specialised mortars and resins for more complex environments.
Concrete Cancer Repair
Where concrete has "spalled" - meaning that pieces of concrete break away from the surface - it is dangerous and is a sign of something else happening within the slab.
Concrete Cancer is not so much a problem with the concrete -more the steel reinforcement within the concrete. Moisture is sometimes able to access the slab through cracks and micro- pores and permeate to the steel reinforcement - corrosion and rust starts.
As the steel rusts, it expands and deforms. This expansion breaks away pieces of concrete and causes them to fall away - referred to as "spalling".
it may look ugly - but its a bigger problem. The reinforcement is not doing what its supposed to be doing - supporting the concrete and adding strength - eventually, there is not enough steel to support the slab and the structure is then greatly weakened and at risk of sudden failure or collapse.
We are able to use speciliased processes, primers and mortars to protect the steel and repair the surrounding concrete as well as identify some of the areas where moisture is gaining access to the slab (cracks, joints, junctions, etc)
Sometimes, all we can do is manage the water problem as opposed to fixing the problem.
to do this, we can use processes such as:
Injection waterproofing methods are used for remedial works and involve low pressure applications and high pressure injections.
For extreme applications and water damage failures, we can use high pressure injection of products that are either Hydrophobic or Hydrophilic.
Both products have their specific uses and each application is different.
Older brick style buildings often require installation of a new Damp Proof Course (DPC).
The DPC acts as a barrier protecting the rising damp from below ground or footing areas from "wicking" up the masonry wall.
We often find that the original DPC installed has degraded over time or it has been compromised somehow. We also find that soil levels change to now be above the original DPC and sub floor ventilation.
We are able to Chemically impregnate a new DPC into the brick- to create a water repellent zone in the wall base.
Negative Barrier Protection
Remedial works from the negative side are a result of building movement or a failure of the positive side membrane, failure of the structural joint or even a drainage breach.
We are able to install several negative side systems which may include flexible cementitious membranes, epoxy systems or even crystalline growth systems.