Ever wondered how to make your residential foundation waterproof or water resistant to prevent the transmission of both water and vapor, to keep the concrete strong and water tight. In the earlier days traditional methods were used for waterproofing by using hand applied solvent-based asphalt product but they would only create a damp-proof environment and not complete waterproofing the foundations.Over the last ten years the construction & concrete cutting Melbourne industry has made remarkable technological advances and now a days very advanced waterproofing methods & materials are used.
Various Types Of Waterproofing Materials
Basic materials that are available today for waterproofing :
Solvent-based asphalt emulsion. This solvent is generally sprayed or applied with hand trowels which is heated to make a spray-able liquid.Very popular in the earlier times but as of today very rarely used.
Rubberized asphalt. The most commonly used waterproofing substance either as “peel and stick” sheet material or as a spray-able liquid.
Rubber. A sprayed material, made from a mixture of synthetic polymer and a chemical solvent which can be applied at temperatures as low as 17° F because of its liquid based state.
Polyethylene. A three-layer sheet membrane system is made by using polyethylene.
Bentonite. Bentonite clay is also extensively used to prevent the flow of water. Bentonite when mixed with water, expands and becomes a thick gel like substance.
Spray-able Membranes Installation
When spray-able membranes are used concretes are not required to be cured before installation.Its convenient to use the spray-able membrane.
Sheet Membranes Installation
Construction contractors who doesn’t prefer or own spray equipments, they generally go for “peel and stick” products.
Oil Based Waterproofing
Its like a primer which is primarily used to prevent water leakage from roofs after construction.
Have you recently spent a huge amount on the sidewalks and now cracks are emerging onto the surface? Ever wondered why did that happened and how can you fix the concrete cracks or avoid it in the future without harming the trees planted around?
Damage to Sidewalk & Trees –
The roots of trees that grows under sidewalks often cracks or lifts the pavements thereby causing a situation of tripping hazard.The supporting roots of a tree that started growing under or next to the sidewalk always follow the cracks on it to find air and water and in turn its creates and enlarges the cracks leading to the damage of the sidewalk concrete. Likewise, to repair or avoid the sidewalk when you cut the supporting roots, it may cause the tree to die and tree loses its mechanical support.
Various ways to avoid damage to the Sidewalk and the trees around.
1.When you are planting new trees, plant them at-least 3 feet away from the pavement. Trees which might grow up to 30 feet in size should be planted 3-4 feet away from the paved areas and for trees growing 50 feet or more there should be a minimum distance of 8 feet between the sidewalk and the tree.
2.You can also trim the roots but its a very complex method you need to be very careful of not damaging the tree. Never try to cut the larger roots as they are the major mechanical support as well as the carrier of nutrients and water. Always cut the root as clean as possible and as far away from the trunk.
3.You can always opt for modifications which can be done under the pavement or just next to it to reduce root growth by installing root barriers alongside the sidewalk or beneath the pavement concrete you can install a root excluding base. Root barriers such as a simple wall made of plastic or other impermeable material planted at-least 18 inches deep to divert the growing direction downwards or else copper or nylon screen to allow passing of only water and nutrients but not the roots. Many people also use root inhibiting herbicides.
4.By building pavement bridges or simply raising the sidewalks over the roots to allow root growth beneath. These pavement bridges are supported by concrete piers near the tree.
5. In case of minor damages and movements you can always bridge the small gaps and create a smooth transition from main sidewalk to broken edges by using asphalt wedge to minimize the tripping hazards. You can also grind down the raised edge if the displacement is less than one inch.
In other cases you can also think of redesigning a portion of the pavement to curve around the obstacle but always remember to leave enough room for the roots to breath.