DIY DryRod Guide

What You'll Need

Do it yourself with DRYROD the revolutionary new treatment for eradicating Rising (Salt) Damp. No liquids, no bottles, no mess, no smell. DRYROD damp-proofing rods are patented 12mm diameter grooved rods that carry a powerful water repellent material. They are simply inserted into 12mm holes in the mortar lines of a building. Once they are inserted, the rods will start to dry out the wall, the carrier rods will slowly diffuse water repellent deep into the damp masonry, curing to form a powerful barrier to further damp ingress. Tests have shown that DRYROD has much better diffusion characteristics than any conventional damp-proofing product.

Equipment Needed

Required: Hammer Drill, 12mm Masonry Drill Bit, Tape Measure, Disposable Rubber Gloves

Other useful tools: Garden Secateurs

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DryRod installation for Rising Damp

Preparation

Mark your drill bit to finish 10mm from the width of the wall you wish to treat. A good quality 12mm Masonry Drill Bit is recommended for enhanced debris removal. Set your drill to rotary hammer mode and attach the suitably marked drill bit.

Identify the lowest horizontal mortar course that is accessible and continuous. Drill holes to the full recommended depth, at regular 120mm spacing along the wall. As the drill bit approaches the final 40mm of the intended hole depth, make sure to reduce the pressure you are putting on the drill. Excessive drilling pressure on the rotary hammer setting can result in damage to the far side of the wall.

Where the mortar is fully saturated, it may have begun to degrade, meaning that drilling dust can clump together and not clear the hole properly.

If this debris obstructs the insertion of the damp-proofing rods, re-drill the holes twice to remove any excess material.

Drilling Patterns

  • Pattern for drilling while treating rising damp

    Recommended Drilling Patterns

  • Pattern for drilling using dryzone products.

    Stretcher Bond

  • Pattern to drill for masonry work.

    Flemish Bond

Irregular Stone

In irregular stone construction drilling points must be measured and care must be taken to make sure the line of the rods follow an unbroken line through the mortar at 12 cm intervals.

Measurement chart showing wall depth when using DryRod products to treat rising damp.

Cutting & Combining DryRod

A standard Dryrod® Damp-Proofing Rod is 180mm in length, and was designed to treat a double brick wall. If the wall is thicker than 220mm, then a second rod can be cut to ensure that to accommodate the extra length leaving a 10mm gap either side of the wall.

For single brick walls simply cut the rod in half to 90mm.

For cavity double brick walls still cut the rods in half to 90mm and insert one half into each skin of the wall.

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