Sydney Based + National Delivery
Sydney Based + National Delivery
Typical Cost Range
Chemical DPC injection in Australia typically costs between $150 and $350 per linear metre.
The range reflects real variation in wall conditions and site access rather than product markup. A straightforward single brick wall with open access sits at the lower end. Double brick, thick heritage masonry, or restricted access pushes toward the upper end.
Two quotes for the same job can look very different. The main reason is experience and thoroughness — not just product choice.
A more thorough contractor will inject every hole to saturation, confirm uptake before moving on, and adjust their method when a wall behaves unexpectedly. A less experienced operator may rush the injection, underdose, or miss sections that aren’t immediately obvious. The barrier looks the same from the outside either way — the difference only shows up later.
A higher price often reflects a more thorough job. DPC injection is one of those trades where cutting corners is invisible until the damp comes back.
Injection creams are often used for small, low-risk jobs where walls are uniform and access is straightforward. They are commonly chosen for DIY applications and simple remedial work.
Injection fluids are typically selected when wall thickness, variability, or condition requires more reliable distribution and coverage through the masonry.
Cost differences usually reflect job complexity and wall structure, rather than the material alone.
Wall thickness
Single brick walls require less product and fewer injection points than double brick or rubble-filled construction. Thicker walls take more fluid, more time, and carry higher risk of incomplete barrier formation if underdosed.
Access difficulty
Open walls with clear mortar joints are straightforward. Walls behind built-in cupboards, vanities, or kitchen cabinetry add significant time and cost. Skirting boards, tiles, and floor coverings that need to be removed and reinstated are also factored into the total job cost.
Wall condition
Broken or deteriorated masonry, heavily salt-affected walls, or walls with internal voids require additional assessment and method adjustment. These conditions increase injection time and product volume to achieve a continuous barrier.
Site complexity
Corners, wall returns, internal partitions, and changes in wall height all add to the injection length and complexity of achieving a complete barrier. Jobs that look simple on paper often have these compounding factors once drilling starts.
Injection method
Fluid injection systems and cream systems have different application rates and product volumes. Method selection should match wall conditions — not just what’s cheapest on the day.
DPC injection costs should be assessed alongside wall condition and long-term performance requirements.
Where wall conditions are more complex, selecting a method that matches the structure can reduce the likelihood of follow-up work and additional remedial costs later.