Waterproofing & Leakage
Window leakage repair — stop rain coming in around your windows
Frame sealing, sill slope correction and drip grooves that keep driving rain out of window gaps.
During heavy rain, water runs down your wall and finds the gap between window frame and masonry. It stains the wall below the window, soaks curtains and rots wooden frames.
The fix is in the details: the frame joint, the sill slope and a drip groove under the sunshade. RennovEN repairs all three.
Signs you need this
- Water on the sill or floor after rain
- Damp patches below window corners
- Swollen or rotting wooden frames
- Gaps visible between frame and wall
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
Gap at frame joint
Shrunken mortar or failed sealant leaves a path for water around the frame.
Inward-sloping sill
A sill sloping towards the room channels water inside.
No drip groove
Without a groove under the sunshade, water runs back towards the wall.
Our method
How RennovEN does it
- 1
Water test
Locate exactly where water enters.
- 2
Seal frames
Clean and seal frame-to-wall joints.
- 3
Correct sills
Re-slope sills and add drip grooves.
- 4
Weather seals
Replace worn gaskets and brushes.
What’s included
- Leak testing at windows
- Frame joint sealing
- Sill slope correction
- Drip groove under sunshades
- Gasket and weather-strip replacement
What affects the cost
- Number of windows
- Window type and frame material
- Height and access
- Extent of sill rework
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
Window sealing and sill work we carry out are covered for 10 years against leakage due to our workmanship.
How our warranty worksFAQ
Window Leakage Repair: your questions
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