Archive for February, 2016

Silt Pits – A New House

Silt Pits – A New House

Silt Pits “Installing agi- pipe drainage systems, including silt pits, to keep water away from footings, walls etc., may be worse than simply properly waterproofing your external wall. Silt pits even when installed properly can cease to function if the agi pipe draining water away from your wall can become blocked externally to the agi pipe preventing any water entering it.” Any drainage system should have silt pits at regular intervals. This includes both stormwater systems and agricultural drains. In […]

Agricultural Drains – A New House

Agricultural Drains – A New House

Agricultural Drains Agricultural drains (often called aggi drains) are used to: Drain waterlogged ground. Avoid soil Heave by keeping your foundations dry (see this Link: Protect foundations) Keep the soil behind Retaining Walls dry. (see this link: Retaining Walls) In the old days agricultural drains used to be constructed out of short lengths of clay pipe butted together without proper joints. The water seeped into the pipe through these butt joints. If you are building on a demolition site you may still […]

Soil Heave – Protecting Slab During Construction

Soil Heave – Protecting Slab During Construction

Protecting Slab During Construction The diagram below shows what you should be looking for, during construction, to protect the ground under your slab from gaining moisture. “Drizoro Maxseal SUPER  to stop water penetration of your slab, Protecting Slab During Construction, especially where the clay remains in the water table” The key issues are: The excavated surface falls away from the edge of the slab for at least 1m with a minimum drop of 75mm. Where the water will not continue […]

Geotextile around Drainage Pipes – A New House

Geotextile around Drainage Pipes – A New House

Geotextile around Drainage Pipes Author: Brian Ashworth June 20, 2012 When researching about installing agricultural drains you will find some books recommend that you place a geotextile in the trench before the initial gravel and then wrap the geotextile over the gravel afterwards. Its something I used to do. You can also buy agi pipe with a geotextile “sock” around it like this: The idea is that the geotextile prevents the gravel,or the pipe getting clogged with fine materials. I DO […]

Relieving Hydrostatic Pressure

Relieving Hydrostatic Pressure

Relieving Hydrostatic Pressure “Are sump pumps the best way of relieving hydrostatic pressure on basement walls from groundwater ?” OnlineWaterproofingShop believes it’s best to apply a continuous coating/membrane to the waterside which withstands the pressure on its surface. What to do when you can no longer apply a coating to the water side. Then a cementitious coating like Drizoro Maxseal Foundation or Drizoro Maxseal Flex which withstands hydrostatic pressure is applied to the inside. This promotes the cementitious crystalline process which eventually drys […]

Waterproofing Concrete is Essential

Waterproofing Concrete is Essential

Waterproofing Concrete is Essential There is a common misconception that concrete provides waterproofing capabilities. This supposition has led to moisture infiltration and structural damage with countless buildings. This misconception has contributed to extensive and extremely costly interior damage. Although concrete in a perfect state will prevent moisture intrusion, there are several potential imperfections to concrete that limit its ability to prevent moisture intrusion throughout its service life. These imperfections can be present at the initial stages of the pour and […]