Dryzone vs Dryrod: Choosing a Rising Damp Treatment
Share
Dryzone cream and Dryrod rods are two ways to introduce a remedial damp-proof course into masonry. Both belong on the shortlist only once rising damp has been established and the treatment is appropriate to the wall. They are not substitutes for repairing rainwater leaks or addressing condensation.
The useful buying comparison is how each product is delivered, what equipment it needs and how much material the wall specification requires.
Compare the formats
| Option | How it is supplied | Buying consideration |
|---|---|---|
| Dryzone 310ml | Cartridge | Check gun and injection nozzle compatibility. |
| Dryzone 600ml | Foil sausage | Needs an applicator suitable for 600ml foil packs. |
| Dryzone 5L | Bulk tub | Plan compatible bulk application equipment. |
| Dryrod 10-pack / 50-pack | Pre-dosed fibre rods | Calculate rod requirements from wall thickness and the specified drilling layout. |
When cream is a practical choice
Dryzone is dispensed into prepared holes along the specified mortar course. The three pack formats let you match the order to your equipment and the size of the job. Do not assume the largest container will be the cheapest installed option if you would need to obtain a different applicator.
A 310/380ml cartridge gun is not a 600ml foil gun. The Dryzone cartridge applicator is listed for the smaller cartridge format; confirm the full gun-and-nozzle arrangement before ordering. The 5L product is a bulk supply, not a drop-in replacement for a cartridge.
Another cream option in the range is Biodry 600ml DPC injection cream. Use its own manufacturer instructions and coverage guidance; do not transfer a Dryzone application schedule to a different product.
When rods are a practical choice
Dryrod uses pre-dosed fibre rods inserted into prepared mortar-bed holes, so there is no injection cream to dispense. Drilling and hole preparation still matter. Wall thickness determines the rod length required, and thicker walls can need more than one rod's worth of material per hole.
Choose the 10-pack or 50-pack from the treatment schedule. A pack count is not a universal metres-of-wall figure: first establish the wall construction, thickness and complete run to be treated.
Calculate quantities from the actual wall
Draw a simple plan and label each wall separately. Include returns and changes in thickness rather than recording only one overall length. Ask the installer which mortar course will be treated and whether access is needed on one or both sides.
For cream, use the current Dryzone coverage guidance. For rods, use the Dryrod wall-thickness and installation guidance. Neither a generic online calculator nor a product pack photograph replaces the specified layout for the building.
Include the plaster work in the budget
Installing a DPC does not instantly dry a wall or remove salts already present. The finishing specification may require removal of affected plaster and a suitable replacement. Compare Dryzone Fast-Set Plaster with the separate Dryshield-and-Drygrip plasterboard route in our guide to replastering after damp-proofing.
Questions to settle before checkout
- Has rising damp been confirmed, with bridging and other moisture sources checked?
- What wall thickness and construction does the treatment schedule cover?
- Which pack format matches the installer's equipment?
- Does the order include the specified finishing materials?
- Are the chosen pack sizes available for the planned work date?
For a broader comparison, return to our damp-proofing materials buying guide, or browse the damp-proofing and building treatments collection.