DryRod – FAQ

Find the answers to all your Rising Salt Damp questions here.


  • What is the difference between Rising Damp and Rising Salt Damp (also called Salt Damp)?

    Rising Damp is caused by the same natural capillary action by which plants absorb moisture into their stems from the soil beneath. It becomes Rising Salt Damp when mineral salts are present in the soil and are drawn up with the moisture.

  • What is the differnce between rising damp and lateral damp?

    Lateral Damp is caused when there is soil higher on the other side of the wall causing the damp to enter the wall laterally from the soil. Lateral damp is prevalent in cellars and houses built into the side of a hill.

  • Will DRYZONE treat lateral damp?

    No, DRYROD is designed specifically to prevent Rising Damp/Salt Damp.

  • How do I know if I have rising damp?

    Flaking paint, bubbling plaster, crumbling bricks, stonework and mortar are the indications of rising damp. As long as there is no soil or rubbish higher on the other side of the wall then it is rising damp.

  • Will DRYROD get rid of the salts that are already in the wall?

    No system on the market can get rid of the salts and or any residual moisture already in the wall above where you have introduced the new Damp Proof Course. The residual moisture will dry out over a period of time depending on how damp the walls are and weather conditions. However the residual salts will continue to attract airborne moisture so it is imperative to introduce a salt retarder/moisture barrier into the new render if and when replastering.

  • Is DRYROD suitable for treating the face of a wall to prevent rain water ingress?

    No, we recommend Stormdry also manufactured by Safeguard in the U.K. For more information on Stormdry visit www.stormdry.com.au.

  • Can DRYROD be injected into loose, powdery mortar?

    No, it is advisable to aggressively remove all loose mortar with a screwdriver and/or stiff wire brush and re-point with 5 parts builders sand and 1 part cement before injecting DRYROD.

  • Will I have to replaster?

    If the existing render is bubbling then it is contaminated with salts and needs to be removed. Sanding back will not solve the problem and is a waste of time as the salts will reactivate and cause more bubbling.

  • Can I replaster straight away?

    Yes, but we recommend that you leave the existing render on for at least six months to act as a sacrificial poultice to help draw out any residual moisture and salts if present.

  • Do I have to replaster the whole wall?

    No, you only need to replaster the bottom part, normally up to 600-700mm but in any event at least 100mm above the height of the rising damp.

  • Do I need to plug the holes?

    You only need to plug the holes for aesthetic reasons and they can be plugged straight after application.

  • Do the rods disappear?

    No. The rods are a solid, fibrous rod designed to remain in the hole.

  • Does DRYROD work?

    I often get asked this question as there is no visible indication of the chemicals leaving the rod and permeating through the masonry as the treatment is invisible. To prove that it has worked spray along the treatment line with a fine water spray a week after applying and you will see the water beading.

  • Do I need to treat the whole wall if only one part is showing signs of rising damp?

    Yes, it is advisable to treat the whole wall as the damp can rise where you have not treated and spread over the top of the treated area. Use any excess Rods by inserting them vertically in each corner.   (For Dryzone “Use any excess cream”)

If we haven’t answered your question, please call us on 0402 278 053.

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