1. Dincel can leak through cold/construction joints.
When installing dincel walls a water-stop strip should be installed on the concrete before the walls are erected. Failure to do this can allow water to seep though the horizontal cold joint between the wall and slab. Water-stop strips are amazing although it is still recommended to apply a membrane to the external of the wall floor joint..
2. Cut Dincel sheets.
Cutting Dincel panels is common practice as the Dincel panels do often not fit the size of the wall. Doing this can cause capillaries which water can pass. Ideally these “Butt” joints where the walls connect should be waterproofed from the outside. We can also fix this problem from the inside after the build is complete.
3. Dincel Corners.
Corners (internal and external) can also leak and it is wise to waterproof them from external..
4. Vibrating the Dincel too much during Concrete pour.
Vibrating the Dincel panels with a concrete vibrator too much can cause the stones in the concrete to accumulate at the bottom of the walls which forces the Dincel panels to bell out at the bottom. When the Dincel bells, it pulls the Dincel clip joint where the panels connect and water can pass though. This issue can be fixed from outside before back-filling or after from internal.
5. Penetrations in the Dincel
Penetrations are often necessary in Dincel to pass services through the wall. These penetrations can be sealed internally after back-filling externally but ideally it is best to do it from the outside as to not let water enter the Dincel panels at all. Once the water inters the Dincel panels it can very easily spread though capillaries inside the Dincel wall.
Screwing gyprock furring channel to Dincel wall is also common practice. Doing this creates THOUSANDS of penetrations in the wall which water can pass though easily (we’ve seen it). Best practice for Gyprock walls is to install a stud and track wall which is fixed to the floor and ceiling so no penetrations are made in the Dincel.
6. DPM (Damp proof membrane)
Plastic is used under slabs to prevent water saturating the slab from below. When plastic is put in place for the DPM it is often turned up INSIDE the form-work and the concrete is poured inside the DPM. When the concrete fills the DPM inside the formwork, the plastic DPM folds and has flutes.
When the plastic “flutes” it creates a capillary deeper into the concrete and water can pass up these flutes under the Dincel wall and behind any external waterproofing membrane and cause a leak inside. This problem could also occur with Besser-Block.
Other factors like rubbish or timber embedded into the concrete from the form work can also cause leaks. It is always best to keep your wall floor joints clean and smooth. A waterproofer can waterproof, but if the substrate is not good, the prior construction can be the cause of ongoing problems.