Small Cracks Just Appearing in my Concrete Tank
Small Cracks Just Appearing in my Concrete Tank
A few small cracks just appeared in my concrete leaking tank/s. Commonly occurs in older (20years) concrete tanks.
Our team recommends strengthening and sealing the internal walls & floor of your tank. This will increase the longevity of your concrete tank.
Leaking cracks in old water tanks are not always easy to fix using Drizoro products the method of repair depends on whether or not the crack is flexing.
Maxseal Foundation | Maxseal Flex | Drizoro Maxrite 700 | Maxrest |
Maxmesh | Drizoro Brush
Maxjoint Elastic Express for Expansion Joints and moving cracks (most cracks will be moving in leaking tanks) The tank is flexing as the level of the water rises and falls.
The best way to repair a tank or any other retaining water structure is on the waterside as it improves the longevity of the tank.
Protects the concrete from further degradation of the concrete by the water in your tank.
External or Outside of Tank
To stop a simple leak use Maxplug. On many cracks, this often moves the leak to the next weak spot. Over time the crack can reopen due to the movement as mentioned above
Please call 0466 797900 and I can discuss you’re the various options
With tank repairs, Drizoro recommends opening the crack at least 20 * 20 mm and filling with Maxrest where dry(no running water) and Maxplug where wet (running water).
Then coating with 2 coats Maxseal Flex reinforced with 200 mm wide Maxmesh
Dos’ and Don’t of Preparing Cracks in Tanks or Retaining Structures
Internal or Inside the Tank
No matter what the age of the tank Drizoro recommends sealing/waterproofing the complete internal area of the tank for the best protection of the tank and its longevity.
Internally you can use Maxseal Foundation or Maxseal Flex are the coatings of choice. Tanks that are continually flexing. Then use Maxseal Flex.
Over cracks use Maxseal Flex with Maxmesh embedded in the first coat.
Where the structure is weakened: – We recommend that a support pillar, to spread the pressure over the crack over a larger area, be built.
This pillar can be built using Drizoro Maxrite 700 or Drizoro Maxrest
Use reinforcement steel in the column to add strength to the water tank wall.
This will help hold your water tank together
Disclaimer: we are not engineers so make sure any pillar using Maxrest or Maxrite 700 is sufficient to support your tank wall/floors.
NOTE:
Coving at the floor wall joint should be rounded (like a cornice). Scrabble in the floor wall joint to get the best adhesion.
The size of the coving is dependent on the strength required to join the wall to the floor.
The tank can also be supported with steel bands. Other methods to contain the walls of the tanks from flexing.
More reading on concrete water tanks
Flexing Reinforced Concrete Tanks Leaking Water >>> read the section about flexing structures
Thanks for visiting our waterproofing shop. Don’t hesitate to call 0466 797900 or reply to this email address to get further information.
If you supply the dimensions and size of the tank I’m happy to calculate your requirements
The diagrams below will help you understand the process. Happy waterproofing.
Regards
Ian Manson
OnlineWaterproofingShop Team
Mobile: +61 466 797 900
Notes and Diagrams:
Before using Drizoro Maxplug Please watch the Video here>>
The diagram below shows typical waterproofing for an internal retaining structure in your case a water tank.
