Our Services
12 service lines.
One PAN India team.
From first inspection to final repair sign-off — covering the complete blade condition-management cycle for wind turbine operators across Tamil Nadu, Karnataka, Maharashtra, Gujarat, Andhra Pradesh, Telangana and Rajasthan, all backed by site-specific QHSE documentation.
Inspections — Ground, Drone, Rope Access & Sky Lift
Four access methods, one consolidated 3-level inspection report — IRATA-certified rope-access technicians, 100MP drone RPAS, ultra-HD ground-based camera systems and sky-lift platforms.
Lightning Damage Repair
OEM-grade composite restoration of lightning strike damage, reinstating full structural and aerodynamic integrity to the manufacturer's design profile.
Laminate Damage Repair
Delamination, cracking and surface defects repaired using glass-fibre laminates — seamless cosmetic and structural restoration to manufacturer specification, blade as new.
Leading Edge Protection
Unprotected blades lose up to 12% AEP within 2–5 years. Our LEP tape, paint and shell applications deliver a 1–2 year ROI, maximising energy production across the wind farm.
Retrofit Upgrades
PCU, VG, LPS, receptor, root-block and LEP (paint/tape/shells) upgrades. A strong back-office ensures accurate timescales and fixed-price quotes.
Split Tip Repair
Split blade tip sections are structurally bonded and finished to OEM tolerances. Completed repairs carry a new-blade warranty.
Fire Damage Repair
Post-fire structural restoration of blade composite and core materials, returning the blade to safe, certified operating condition.
Trailing Edge Repair
Trailing-edge bond integrity restored to prevent aerodynamic noise and structural failure — all damage grades handled.
Vortex Generator Installation
VGs improve aerodynamics and boost Annual Energy Production. Our experienced teams deploy across all major OEM blade makes.
Tower & Nacelle Repair
Cell-joint corrosion treated with PU paint and tape, inside and outside. Nacelle composite damage repaired by qualified teams.
Blade Erection / De-Erection
Crane-less technology for blade and major component de-erection & re-erection — all WTG capacities, eliminating heavy crane cost and logistics.
Blade & Tower Cleaning
Rope access and sky-lift washing services remove insects, salt and grime that disrupt laminar airflow — scheduled AMC-based or ad-hoc programmes.
Inspection Services
Four access methods — safe, data-rich, reliable
Every survey is matched to the access method that suits the job, and reported against a consolidated 3-level inspection structure.
Ground Based
- ~1,100 images stitched per turbine
- Ultra-HD automated camera system
- Zero working at height — max safety
- Defect progression tracking over time
- Consolidated 3-level inspection report
Drone Inspection
- 100MP tri-mount gimbal RPAS systems
- Stable visual datasets in all conditions
- Actionable data for O&M scheduling
- Advanced analytics software integration
- High-definition image acquisition
Rope Access
- IRATA-certified blade technicians
- Up to 6 blades inspected per day
- Quick mobilisation, minimal manpower
- Defect severity graded and reported
- All images treated confidentially
Sky Lift
- Platform-based elevated access
- Ideal for complex or large damage
- Safe, stable working platform
- Combinable with blade repair works
- Suitable for all major WTG makes
Blade Erection & De-Erection
Crane-less technology
4 Season Composites offers complete blade and major-component de-erection and re-erection using advanced crane-less technology — eliminating heavy crane cost and logistics for all WTG capacities.
- No heavy crane — major cost and logistics saving for operators
- All major WTG capacities and OEM makes covered
- 24/7 qualified engineering and technical support on site
- 50MT–550MT crane fleet available for conventional method
- Clients: Suzlon, GE, Siemens Gamesa, Greenko, Tata Power, Inox Wind
Blades
Pitch Bearing
1.25 & 1.5MW
1.25–2.1MW
End of Warranty & Transit Damage
Protecting assets at critical lifecycle moments
Four Season serves 30+ turbine owner groups requiring comprehensive End of Warranty (EOW) inspections, combining the latest research with extensive field experience across three inspection levels.
Outside Surface
10% representative coverage of the external blade surface, identifying visible defects and erosion.
Inside Surface
10% representative coverage of the internal blade structure, accessed via the root and webbing.
NDT — 80% Coverage
Non-destructive testing across 80% of the blade, the deepest level of EOW assessment before warranty expiry.
Transit & Installation Damage Repair
Blade damage during transport and erection is repaired on-site with speed and precision, minimising commissioning delays and project cost overruns.
- Rapid on-site deployment to any location in India
- All WTG makes and blade types supported
- Full quality documentation and sign-off report
- Coordinates directly with EPC and OEM teams
V & U Guard Manufacturing
In-house manufactured V-guard and U-guard profiles for leading-edge protection and aerodynamic enhancement of turbine blades — a specialist programme supporting our LEP and retrofit work.
Combined with our Blade & Tower Cleaning service, regular professional cleaning protects Annual Energy Production (AEP) — dirt, insects, salt deposits and bird droppings can reduce turbine efficiency by up to 5%.
Materials & Method
Repairs matched to the original laminate
Structural repairs use glass-fibre reinforced polymer (GFRP) systems — including biaxial and unidirectional fabrics — selected to match the blade's original layup, then cured and finished to a documented method statement. Cosmetic work restores gel-coat and leading-edge protection to manufacturer-aligned standards.
Every repair is tied back to the inspection report that identified it, so the asset record shows not just what was found, but how — and to what standard — it was fixed, wherever the site is in India.
- Inspection Ground, drone, rope access & sky lift — every blade surface
- Reporting Damage logged by blade station & severity
- Repair GFRP structural & gel-coat cosmetic work
- Sign-Off Completion documentation for the asset file
FAQ
Frequently asked questions
Common questions from wind farm operators, EPCs and asset managers planning a 4SC engagement.
What wind turbine blade services does 4 Season Composites offer?
We provide 12 wind turbine blade service lines — ground/drone/rope-access/sky-lift inspections, lightning damage repair, laminate damage repair, leading edge protection (LEP), retrofit upgrades, split tip repair, fire damage repair, trailing edge repair, vortex generator installation, tower & nacelle repair, crane-less blade erection/de-erection, and blade & tower cleaning.
Where do you operate?
4SC is a PAN India service provider with active deployments across Tamil Nadu, Karnataka, Maharashtra, Gujarat, Andhra Pradesh, Telangana and Rajasthan. Our head office is in Seydunganallur, Tuticorin District, Tamil Nadu.
Are your technicians certified?
Yes — our field technicians are IRATA-certified for rope access, and the company is triple ISO-certified (ISO 9001:2015 Quality, ISO 45001:2018 OH&S, ISO 14001:2015 Environmental) through Ingrain Global Standards, valid through September 2028.
What is crane-less blade erection?
Crane-less technology enables blade and major-component (gearbox, generator, pitch bearing) change-outs without mobilising heavy cranes — a significant cost and logistics saving for wind farm operators. Our track record includes 10 Suzlon 2.1MW blades, 12 Suzlon 1.5MW pitch bearings, 8 gearboxes, 6 generators and 5+ GE blade replacements.
Who are your clients?
30+ wind farm operators across India trust 4SC, including Greenko, JSW Energy, Tata Power, Inox Wind, Siemens Gamesa, GE Renewable, Leap Green Energy, Pioneer Wincon, Sandur Power Company, Vayona Energy and Nordex India.
How quickly can you mobilise to a site?
We maintain rapid-response capability PAN India. After a site enquiry, we typically issue an authorisation letter and HIRA within days, and can mobilise IRATA-certified teams to most major wind corridors within a week subject to scope.
Tell us what you need inspected or repaired
Share your turbine model, blade length and site location — we'll come back with a scope of work and quotation.