Waterproofing & Leakage
Basement waterproofing that keeps groundwater out for good
Negative-side and positive-side treatments, crack injection and drainage for dry, usable basements in homes.
A damp basement smells, grows fungus and damages anything stored in it. Because it sits below ground, water pushes in from the soil with real pressure, especially in the monsoon.
Basement waterproofing needs a different approach from roofs. RennovEN chooses between external membranes, internal tanking and crack injection based on your basement and site.
Signs you need this
- Wet walls or floor in the basement
- Water seeping through cracks during rain
- White salt deposits on basement walls
- Strong musty smell
The RennovEN promise
- 10-year warranty on all works
- Itemised pricing, approved before work begins
- One accountable team across every trade
- Residential specialists — homes only
Diagnosis
Why it happens
Hydrostatic pressure
Groundwater pushes against walls and floor, forcing water through any weakness.
Construction joints
Joints between floor and wall pours are a common entry point.
Poor site drainage
Rainwater collecting around the building raises pressure on basement walls.
Our method
How RennovEN does it
- 1
Survey
Identify entry points, moisture levels and drainage.
- 2
Seal active leaks
Crack and joint injection to stop flowing water.
- 3
Waterproof
Internal tanking or external membrane as suitable.
- 4
Drain
Improve site drainage or add a sump where needed.
What’s included
- Moisture and leak survey
- Crack and joint injection
- Internal or external waterproofing system
- Drainage improvements
- Finishing for usable space
What affects the cost
- Basement area and depth
- Water table and site conditions
- Access to external walls
- Treatment system required
Every home is different, so we don’t publish rate cards. After a free inspection you get an itemised estimate, and you approve every line before work begins.
Get my itemised estimate10-year warranty
Basement areas we waterproof are covered against water ingress for 10 years against workmanship defects.
How our warranty worksFAQ
Basement Waterproofing: your questions
Related
You might also need
Injection Grouting
PU and cementitious injection that fills cracks and voids carrying water through concrete, without large-scale demolition.
ExploreRising Damp Treatment
Chemical damp-proof course injection and breathable re-plastering to stop moisture climbing up from the ground.
ExploreMould Removal & Prevention
Remove mould safely and stop it coming back.
Explore