Most curtain injection projects complete in 2-5 days depending on wall area and water pressure conditions. The injection process itself takes 1-2 days, but gel requires time to penetrate and harden. We verify waterproofing through water pressure testing before demobilizing, typically 3-5 days after injection begins.

Yes, when performed correctly with quality gel systems, curtain injection provides permanent waterproofing with a 5-year guarantee. The acrylamide or polyurethane gel fills voids, cracks, and pores behind walls to create an impermeable barrier. The waterproofing remains effective regardless of groundwater pressure fluctuations or seasonal water table variations.

Curtain injection avoids expensive excavation, protects existing landscaping and structures, and works in situations where excavation is impossible. Heritage buildings, tight urban sites, and basements with water problems benefit from injection because we don't disturb the foundation perimeter. Costs are typically 40-60% less than full excavation and membrane installation.

Curtain wall injection typically costs $200-500 per linear meter depending on wall height and groundwater pressure. A typical 15m x 3m deep basement wall costs $9,000-22,500. Larger commercial projects with multiple walls and deeper foundations may cost $50,000-150,000. Free site assessment and quotes provided with water pressure analysis.

Interior damage is minimal. We drill small injection holes from inside the basement at regular intervals (typically 1m spacing). Holes are sealed after injection and can be plastered over invisibly. No excavation means no exterior damage, and existing interior finishes remain undisturbed. We take precautions to protect existing finishes during injection.

Most basements experience immediate water cutoff, but complete drying may take 2-4 weeks as trapped moisture evaporates through concrete and existing ventilation. We recommend installing temporary dehumidifiers to accelerate drying. Water pressure testing confirms complete water cutoff within 3-5 days of injection completion.