Façade Defect Rectification in Singapore: What Happens After the PFI Report

A Periodic Façade Inspection report is not the end of the process; for most buildings it is the start of the expensive part. Once BCA accepts the Competent Person’s (CP’s) report, it writes to the owner to follow up, and the owner must carry out the recommended measures or building works within the period, and subject to any conditions, that the Commissioner of Building Control specifies.³² BCA described this from the outset as part of the regime: the CP proposes rectification works, and responsible parties must ensure those works are carried out within a period specified by BCA.¹³ Failing to do so without reasonable excuse is an offence carrying a fine of up to S$20,000, up to 12 months’ imprisonment, or both, plus daily fines for continuing contraventions.³

This guide is for owners, MCSTs and facility managers holding a report with “Require Repair” or “Unsafe” classifications. It explains what each common defect usually means, how it is typically rectified, how the works should be sequenced, who must design, supervise and sign off, which temporary safety measures apply, and what quality checks separate a durable repair from a cosmetic one. It builds on our complete guide to the PFI.

The guiding principle throughout is BCA’s: the CP’s repair proposal must cover the entire façade, not only the areas inspected at close range, and must include methods, materials, precautions and a timeframe.¹ The 10% close-range sample tells you the condition of each façade system; the repair has to address the system.

Step one: read the report the way BCA does

Every façade type in the report carries one of three classifications:¹

The report should also identify the cause of each “Require Repair” or “Unsafe” defect, compare conditions with the previous cycle, and recommend maintenance until the next inspection.¹ Before you invite quotations, check that you have:

• a marked-up elevation or drawing locating every defect;
• the CP’s diagnosis of cause, not only a description of symptoms;
• a repair specification (method, materials, extent) for each façade system;
• the CP’s stated timeframe; and
• BCA’s letter confirming the period within which repairs must be done.

If any of these is missing, ask the CP before you tender. Contractors pricing from photographs alone will price differently, and the cheapest quote will usually be the one that understood the least. Our guide on variation orders and provisional sums explains how to stop scope gaps turning into surprise costs.

Step two: make it safe

For “Unsafe” or “Require Repair” classifications, the CP must recommend to the owner all necessary immediate measures so that the façade does not endanger people or damage property. BCA’s guidelines state that any façade element found to be loose or dangling must be removed immediately, and name cordoning off, erecting protective hoarding and removal of the affected element as examples of measures the CP must assess.¹ BCA also expects the CP to report unsafe conditions immediately to the Commissioner of Building Control and the owner, and to report any dangling window found during inspection.¹

Two practical cautions. First, a covered walkway or hoarding that sits on a public road or footpath may need agency permission; check before erecting it. Second, removing a loose element is itself work at height and must comply with the Workplace Safety and Health (Work at Heights) Regulations 2013, including adequate training and immediate supervision by a competent person.¹⁴

If an exterior feature has already fallen, BCA’s PFI page asks that its Safety Incident Hotline be called within 6 hours and an incident report submitted within 24 hours under the Building Control (Reportable Matters) Regulations 2025.⁴

Common façade defects and how they are rectified

The table summarises the defect families BCA lists in section 9 of its PFI guidelines, with typical repair approaches. The repair approach for any specific building must come from the CP’s report and, where structural, a PE’s design.

Sources: BCA PFI guidelines, sections 9 and 10;¹ BCA window safety page.⁵

Sealant failure

Sealant is the most common and most underestimated façade defect. It keeps water out, and in structural silicone glazing it also holds glass in place. BCA lists loose gaskets and seals and failure of joints among common curtain wall defects, damaged sealant among balustrade defects, and failure of adhesive bond, such as structural sealant, among cladding defects.¹

The distinction that matters is weather sealant versus structural sealant:

• Weather sealant closes joints against water and air. Failure causes leaks and accelerates corrosion behind the façade but does not by itself release a panel.
• Structural sealant bonds glass or panels to the frame and carries load. Failure can release a glass unit. ASTM C1401 is the standard guide for structural sealant glazing.⁸ BCA gives de-glazing tests and sealant pull-out tests on existing structural sealant as examples of on-site tests a CP may propose in a full façade investigation.¹

A durable weather-sealant repair generally involves cutting out the old sealant completely, cleaning and priming the substrate as the sealant manufacturer specifies, installing a suitable backer so the sealant adheres to two sides only, and tooling the bead. Over-sealing (running new sealant over old) is a patch, not a repair. Adhesion of installed joints can be evaluated in the field; ASTM C1521 is the practice for evaluating adhesion of installed weatherproofing sealant joints, and ASTM has revised it to include non-destructive rolling-device methods.⁹

BCA’s 2026 guidelines include research on material service life under projected climate change, which found sealants performing well overall but gaskets needing more frequent replacement.¹ Plan gasket replacement as a recurring item, not a one-off.

Cladding and composite panel defects

BCA’s list of cladding defects is a practical diagnostic checklist: missing screws or pins, corroded brackets and fasteners, failed screws or rivets, failed adhesive bonds, warped or cracked panels, loose or dislodged panels, over-drilled fasteners damaging boards, poor drainage and ventilation causing moisture retention, lack of movement joints causing thermal cracking, and unsuitable non-weather-resistant boards.¹

Several of these are design defects, not wear. A board that was installed without movement joints or drainage will fail again if it is simply replaced like-for-like. The CP’s report should say whether the fixing system itself needs redesign.

BCA singles out three façade types as vulnerable:¹

• Brick façades with inner and outer leaves depend on concrete nibs and steel ties; defects include walls not seated on nibs, spalling nibs and corroded or wrongly spaced ties.
• Calcium silicate boards suffer from lack of expansion space, trapped water that keeps them wet, enlarged screw holes and short material life.
• Handset stone cladding must be mechanically fixed; BCA records makeshift fixings and epoxy used in place of proper anchors, missing restraint pins and inadequate bracket engagement.

For aluminium composite panels (ACP), replacement brings fire compliance into scope. SCDF’s Fire Code 2023 requires composite panels used as external wall cladding to comply with its specific composite-panel clause,⁶ and SCDF has stated that composite cladding panels must be non-combustible or certified Class 0.⁷ Replacement panels must be specified and documented accordingly. Our guide to SCDF fire safety for fit-outs explains how fire safety approvals work.

Glass and glazing

Cracked or missing glass is an obvious hazard, so the first step is always to make safe and protect the area below. Beyond replacing the unit, the CP should determine why it broke: impact, thermal stress, edge damage, frame movement, or failure of the structural bond. BCA lists cracked glass balustrades and damaged sealant among balustrade defects, and broken infill panels and dislodged panels among curtain wall defects.¹

Where glass is part of a barrier or relies on structural silicone, involve a PE. Replacing a safety barrier that is integrated with a window requires PE-designed structural plans submitted to BCA, unless BCA’s standardised designs are used, in which case the work counts as insignificant building works.⁵

Spalling concrete

Spalling is usually the visible end of reinforcement corrosion: steel expands as it rusts and bursts the concrete cover. On a façade it matters twice, because concrete pieces fall and because the steel may be structural.

BCA’s guidance for structural engineers says that where spalling is observed, the engineer should carry out simple tests such as tapping on other areas to identify the risk of further spalling, and that major repairs and strengthening must be treated as building works, with the procedures for plan approval, permits and supervision applying.¹² The PFI guidelines say the same for façade repairs involving structural elements.¹

A conventional concrete repair sequence is: mark out the area by tap testing; break out unsound concrete to behind the reinforcement; clean the steel and assess section loss (the PE decides whether bars need supplementing); treat the steel; reinstate with a compatible repair mortar; cure; and apply a protective coating. The extent of breakout, the repair material and any added reinforcement are the PE’s call, not the contractor’s.

Corroded brackets and fixings

Brackets and fixings are where façades actually fail: the panel or tile is only as secure as what holds it. BCA lists corrosion of brackets and fasteners across curtain walls, cladding, railings, fins, louvres, sunshades and air-conditioner supports, and notes that for metal fixtures installed after TOP or CSC it is important to establish their age and details to assess the risk of falling.¹

Rectification typically means exposing the fixings, assessing remaining section, and replacing with durable materials and compatible fasteners that avoid galvanic corrosion. BCA’s climate research found metals generally resilient but estimated a reduced service life of about 22 years for aluminium rivets under projected climate conditions.¹ Replacement fixings should be selected with the next two PFI cycles in mind.

Loose, hollow and cracked tiles; bulging plaster

Hollow tiles and bulging plaster are found by tapping during the close-range inspection.¹ They indicate loss of bond with the substrate, and the bond rarely recovers. Typical repair is to hack off debonded areas back to sound substrate, reinstate with a compatible adhesive or render system, and seal or regrout. Where efflorescence or staining shows water movement, the water source must be fixed first or the new finish will debond in turn; see our guide to façade water leakage diagnosis.

BCA’s research identified tile adhesive as the material of greatest concern, with service life dropping to about 10 years, a reduction of up to 30%, under projected climate stress.¹ For tiled façades, the CP may recommend more extensive tap testing or recladding rather than spot repair.

Window failures

Windows have their own rules. BCA asks that aluminium rivets be replaced with type 304 stainless steel rivets during retrofitting, and contractors must report casement windows with aluminium rivets to BCA.⁵ Replacement windows must be installed by an approved window contractor (registered under workhead RW01) or a GB1 or GB2 licensed builder, using a trained window installer who has at least 12 months’ installation experience and has passed the “Safety of Windows” course. A certificate of completion is submitted within 14 days of completion.⁵

Sequencing the works

Good sequencing reduces access cost, protects completed work and keeps the building safe.

Where defects found during repairs exceed the CP’s estimate, which is common once panels come off, stop and get the CP’s or PE’s instruction rather than extending the repair on the contractor’s judgement. Then document the variation.

Who designs, who supervises, who signs off

BCA’s guidelines state that, on completion, the owner submits photographs of the completed repairs and a certification that the repairs were carried out in accordance with the CP’s recommendations and supervised by a PE or the CP to their satisfaction.¹ BCA provides a completion-of-remedial-works report template for this.⁴

Quality checks that make a repair last

A façade repair should be verifiable. Agree the checks in the specification so they are priced, not argued about later:

Water testing is a particularly useful acceptance test for any repair that was prompted by leaks; see our guide to façade leak diagnosis for the field tests commonly used.

Choosing access for the repairs

The access decision often determines both the cost and the programme. Localised defects spread over a tall façade suit rope access, which can drop quickly to individual locations; extensive repairs on one elevation may justify a gondola or scaffold; low-level canopies and soffits may suit a mobile elevating work platform. Where a suspended scaffold (gondola) is used, MOM requires the outriggers or overhead supports to be designed by a PE, installed by an approved scaffold contractor and checked before the suspended scaffold is certified by an Authorised Examiner.¹¹ Our comparison of rope access, scaffolding and gondolas sets out the rules and trade-offs.

Penalties and the duty that never expires

Failing to carry out the works required after a PFI, without reasonable excuse, can attract a fine of up to S$20,000, imprisonment of up to 12 months or both, plus up to S$500 a day while the contravention continues and up to S$2,000 a day if it continues after conviction.³ Separately, the Building Control Act makes it an offence for a person responsible for an exterior feature to fail, without reasonable excuse, to keep it securely fixed, with a fine of up to S$20,000, up to 12 months’ imprisonment or both.¹⁰ Where a feature has collapsed through damage or disrepair not caused by accident or natural events, the person responsible is presumed to have failed in that duty unless proved otherwise.¹⁰ Selling the building does not discharge the repair duty attached to a PFI notice.²

Key takeaways

• Make unsafe areas safe immediately; loose or dangling elements must be removed at once.
• Repair the façade system, not just the inspected 10%; BCA requires the CP’s proposal to cover the entire façade.
• Diagnose cause before choosing a method; many defects are design or water problems that will recur if patched.
• Structural repairs need plan approval and a permit where applicable, and PE supervision.
• Replacement cladding must meet SCDF fire requirements; replacement windows need an approved window contractor or GB1/GB2 builder.
• Specify verifiable quality checks and keep a full photographic record for the completion certificate and the next PFI cycle.

See the glossary for definitions, or contact us to arrange a site survey.