Don't you emphasise that drone work carries no fall exposure? So why rope technicians?

Because these are two different things. Cleaning and inspection are done by drone, with the crew on the ground throughout — that commitment has not changed. But repair requires contact with the wall: stripping hollow tiles, injecting cracks, applying waterproofing. A machine cannot do it. Our rule is simple: if we don't have to go on the wall, we don't; where we must, an IRATA-certified team works to a written job plan, twin-rope backup and ground exclusion control. We don't put people on a wall to keep them busy.

When would you recommend rope access over a drone?

Two cases. Position: light wells, soffits, behind louvres, parapet interiors, narrow lanes and tight party walls, or a site where flight is prohibited — a drone cannot get there. And process: close-up tapping, tile stripping and re-laying, crack injection, waterproofing — these need contact and force. Everything else, large-area cleaning and survey included, we do by drone.

What are the technicians qualified in? Does your insurance cover it?

The team holds IRATA rope access certification and the Ministry of Labor work-at-height training required in Taiwan. The company's existing public liability and employer's liability cover extends to rope access work, and policy copies can be inspected before contract. Every job starts with a site risk assessment and a job plan covering anchor verification and emergency rescue.

How far does the repair go? Can you waterproof a whole elevation?

We self-perform four disciplines: close-up inspection and tapping, tile stripping/re-laying and local replacement, crack injection and joint sealing, and facade waterproofing with top-coat repair. Waterproofing can be local or full-elevation, leak-tested on completion. Work beyond that — structural strengthening, curtain-wall system replacement — we flag in the report and help you appoint the right specialist for.

Once the inspection finds something, can one firm take it through to a finished repair?

Yes — that is precisely why we built the rope team. Previously a diagnosis meant appointing a separate repair contractor: explaining the site again, re-tendering, and two parties pointing at each other when something went wrong. Now the drone health check, AI classification, rope-access verification, repair and waterproofing sit under one report and one point of contact. Diagnosis and treatment stay separate all the same: a diagnosis is not a commitment to repair, and we may well advise that nothing needs doing this year.

Will rope work disturb residents? Do you need to close the road?

Rope access needs no scaffolding and no road closure. An exclusion zone is set below the work area and managed by a spotter. Residents mainly need to close windows and bring in balcony laundry; we prepare the notices and explanatory material. Compared with scaffolding or cradles, the set-up and strike time is far lower, which suits localised and phased work.

A rope technician's gloved hand checking ribbed facade tiles at the roof edge, with the blue main rope and a power tool alongside

— Service 05 · Facade repair & waterproofing

After the diagnosis, someone still has to go up and fix it.

Our own industrial rope access team — for what a drone cannot reach, and every step that needs a pair of hands.

A drone can see, clean and coat. It cannot knock off a hollow tile or fill a crack. GDS's in-house industrial rope access team takes over from there: the areas a drone cannot reach, close-up verification of what the inspection flagged, and the repair and waterproofing that follows. One report, one point of contact, from finding the problem to finishing the fix.

#facade repair#tile delamination repair#facade waterproofing#crack injection#rope access

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IRATA

Rope access certification

Twin-rope

Independent backup

Covered

Rope work insured

Repair disciplines

— 002 · Division of method

If we don't have to go on the wall, we don't.

These are not two parallel methods but one sequence. Whatever the drone can do, nobody goes on the wall for; where the wall must be touched, IRATA-certified rope technicians work to a written job plan.

Task

Performed by

Why

Whole-building facade survey

Drone

A full elevation in half a day, including heights nobody can reach, with the crew on the ground throughout.

Large-area cleaning and coating

Drone

No scaffolding, no road closures, minimal disruption to residents and building operations.

Areas a drone cannot reach

Rope technician

Light wells, soffits, the back of louvres — places where flight is constrained and a person has to actually get there.

Close-up verification and hammer tapping

Rope technician

Thermal imaging flags what is suspect; only tapping tells you whether it is truly hollow.

Tile, crack and waterproofing repair

Rope technician

Repair needs contact and force — that is the part a machine cannot do.

The drone sees and treats large areas; the rope team reaches and repairs. The order never reverses: we don't put people on a wall to keep them busy.

— 003 · Three roles

The rope team does three things.

Not "we also do traditional high-access work", but closing the three gaps a drone method leaves: places it cannot reach, judgements that need contact, and repairs that need hands.

01 · Reach

The places a drone cannot get to.

No elevation is one hundred per cent suited to flight. These positions aren't ignored — they're assigned to the other crew.

A vacuum suction anchor and red rope set on the edge of a glass canopy, the joints already masked with tape

What makes it hard

Light wells and inner courtyards
Enclosed on four sides, turbulent airflow, obstructed GPS — neither precision nor safety margin is adequate.
Soffits and balcony undersides
Blind to an upward angle: hard to approach and the camera cannot see the underside.
Behind louvres and grilles
The wall behind a screening layer — both imaging and spray are blocked.
Parapet interiors and roof structures
Complex geometry and densely mounted equipment that need handling item by item.
Narrow lanes and tight party walls
Insufficient separation to open a safe flight path.
No-fly and restricted sites
Where the site itself forbids flight, rope access is the only lawful way to work it.

How we work it

01
During the site survey, mark drone-coverable areas and rope-only areas together, and write both into the job plan.
02
Confirm rooftop anchor positions and load capacity; where they are inadequate, rig a temporary anchor system.
03
The drone completes the flyable areas first; the rope crew works only the flagged list, with no duplicated passes.
04
Rope-worked areas keep the same before-and-after image record, folded into the same delivered report.

02 · Verification

Thermal says "suspect". Tapping tells you.

AI classification and infrared imaging find the suspect points across the whole building. Deciding whether to repair, and over what area, still takes someone in front of that piece of wall.

A close-up of a crack running along a facade tile joint, with the rope technician's boot and rope in frame

What makes it hard

Thermal screens, it does not adjudicate
A temperature anomaly can mean an air layer beneath the tile — or simply a material change or residual sun load.
Crack width and depth
Imaging shows where a crack runs; measuring how wide and deep still needs instruments up close.
Tile adhesion
Only the sound of a tap separates bonded, marginally hollow and already detached.
Water ingress paths
Where staining appears on the surface is rarely where the water got in; it has to be traced upward, section by section.

How we work it

01
Order the close-up checks by the defect list and coordinates the AI produced.
02
Rope technicians descend to each flagged point to tap, measure and photograph at close range.
03
Findings go back into the same report, correcting the severity grading the AI assigned.
04
The verified result becomes the basis for an architect's or engineer's sign-off and for the repair priority order.

03 · Repair

Repair needs hands on the wall.

Once the health report lists what needs fixing, our own team does the work — no second contractor to appoint, no site conditions to explain twice.

A rope technician suspended on a tiled facade, cutting tiles with a cordless grinder

What makes it hard

Hollowing spreads if left
The boundary keeps migrating with temperature swings and vibration; the longer it waits, the more has to come off.
A crack is the way water gets in
Painting over the surface does not solve it — water still travels the crack into the structure.
Colour matching on local repairs
Discontinued tiles and batch variation both affect how the repair reads afterwards.
Joining new waterproofing to old
The interface is where leaks most often return; the detailing decides the outcome.

How we work it

01
Sequence the work by the report's priority order: stop the water first, then the substrate, then appearance.
02
Strip hollow tiles, level the substrate and re-lay or locally replace — with tile sourcing and colour match confirmed beforehand.
03
Inject cracks with epoxy or foam resin by width; renew sealant at movement joints and window perimeters.
04
Confirm the finished waterproofing by ponding or spray test before making good the top coat.
05
Before, during and after images are retained and folded into the building's timeline.

— 004 · Scope of work

The four disciplines we self-perform.

These four are carried out directly by the GDS rope access team. Work beyond that scope — structural strengthening, curtain-wall replacement — we flag in the report and help you appoint the right specialist for, rather than taking it on regardless.

Discipline 01

Close-up inspection and hammer tapping

Contact verification of the suspect points a drone survey flagged, settling what imaging alone cannot.

·Point-by-point tapping
·Crack width and depth measurement
·Close-range condition photography
·Findings written back into the health report

Discipline 02

Tile stripping, re-laying and local replacement

Treating confirmed hollow and spalled areas, from removal and substrate levelling through to re-laying.

·Hollow-area removal
·Substrate levelling and priming
·Matched or near-match replacement tiles
·Edge and corner making good

Discipline 03

Crack injection and joint sealing

Closing the way in for water: injection material chosen by crack width, with aged sealant renewed at joints.

·Epoxy resin injection
·Foam resin injection
·Movement joint renewal
·Window perimeter sealing

Discipline 04

Facade waterproofing and top-coat repair

Local or full-elevation waterproofing, leak-tested on completion, then made good for appearance.

·Local and full-elevation systems
·Detailing where new meets old
·Ponding or spray leak test
·Top-coat colour matching

— 005 · Safety system

Going on the wall is a matter of system, not nerve.

The risk in rope access is not whether someone goes on the wall, but what training they hold, what procedure they follow, and what backs them up if something fails. This is what we do on every job.

IRATA rope access certification

The team holds Industrial Rope Access Trade Association (IRATA) certification and works descent, positioning, rescue and operating procedures to its standards.

Ministry of Labor work-at-height training

Technicians hold the statutory work-at-height training required under Taiwan's occupational safety and health regulations.

Twin-rope independent backup

Working line and safety line run to separate anchors, so a failure of either still leaves full support. Nothing depends on a single point.

Job plan and risk assessment

Every job begins with a site risk assessment, anchor position and load verification, and a written emergency rescue procedure.

Ground exclusion and traffic control

An exclusion zone is set below the work area and managed by a spotter — the same safety standard applied to drone operations.

Rope work is covered by our insurance

The company's public liability and employer's liability policies cover rope access work; copies are available for inspection before contract.

Full image record

Before, during and after images are retained — both as the basis for acceptance and as part of the building health timeline for year-over-year comparison.

— 006 · Further reading

Rope access and facade repair

What owners and building committees most often check before appointing a repair contractor. Certifications, policies and job plans are all available for inspection before contract.

Talk to us

After the diagnosis, someone still has to go up and fix it.

If we don't have to go on the wall, we don't.

The rope team does three things.

The places a drone cannot get to.

Thermal says "suspect". Tapping tells you.

Repair needs hands on the wall.

The four disciplines we self-perform.

Close-up inspection and hammer tapping

Tile stripping, re-laying and local replacement

Crack injection and joint sealing

Facade waterproofing and top-coat repair

Going on the wall is a matter of system, not nerve.

IRATA rope access certification

Ministry of Labor work-at-height training

Twin-rope independent backup

Job plan and risk assessment

Ground exclusion and traffic control

Rope work is covered by our insurance

Full image record

Further reading

Rope access and facade repair

Contact Us

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