A drain is constructed terminating in a drainage pit equipped with a sump pump or alternatively to a local storm water outlet. The drain will be approximately 150mm into the clay base and lay a 90mm diameter agricultural drain wrapped in geotextile, which will prevent subsequent blockage due to silting. We remove the excavated material from site and backfill the drain with 20mm one sized aggregate to 200mm from the surface where the ground will be restored.
Drainage is also effectively used to divert water from an area of lateral dampness.
Poor or non-existent drainage can lead to excessive amounts of moisture reaching the sub-floor environs of the house. Here at FG James Pty Ltd, our professional and experienced soil engineers will propose a drainage system to divert water away from the perimeter walls of the property, decreasing the ground water flow to the sub-floor area and the surrounding footings.
Lateral dampness occurs when the internal floor level is lower than the external ground level. Lateral damp penetration from the surrounding ground into the internal wall can cause plaster and brick damage through the migration of hygroscopic salts. Before drainage works are undertaken, the plumbing junctions should be inspected to eliminate them as a source of moisture.
In order to effectively drain and damp proof the walls from the positive side, the surrounding earth needs to be trenched 600mm wide down to the footings to allow sufficient working space.
After exposure of the sub-ground walls, our professional and reliable team of experts at FG James Pty Ltd will tank and seal the sub-ground section of the walls by brush application of cementitious membrane in slurry form to the brick faces of the walls. This has the combined effect of sealing any gaps in the brickwork and waterproofing in its own right.
After suitable priming, we will apply an elastomeric membrane prior to the installation of a geo-textile covered cut off drain plumbed to SW. The tanking will be protected with protector board and the trench will be backfilled to 200mm from the surface with 20mm aggregate and the original ground made good.
How It Works
Call or email us to book a damp investigation appointment.
Our survey will locate where and what is causing the damp and what measures are required to eradicate it.
All work is carried out by our experienced technicians to the high standards
We are fully insured and all our works are comes with 20 years gurantee
FREE inspection reports, detailed reports and quotations. Call us Today!! 03-9885-9444
WE ARE SPECIALISTS IN
Basement & Cellar Dampness
Soil Inspection & Report
Damp Odours & Mould
High Wall Ventilation
Written Condition Reports
Damp Skirting Replacement
Sub Floor Ventilation
Membranes to Concrete Balconies / Decking