Free tools Windows power users keep installed
One-click scans. No signup required.
Some links on this page are affiliate links: if you buy through them we may earn a commission, at no extra cost to you.
The Candler Building restoration shows how a historic terra-cotta façade can be saved without pretending every original piece is repairable. The project stopped water entry, repaired panels whose anchors could be stabilized, replaced irreparable cladding with carefully matched cast stone or glass-fiber-reinforced concrete (GFRC), and accepted a documented compromise on some balcony ornament.
Building Design + Construction reported the work in 2010 as a case study of the 24-story Candler Building in Times Square, completed in 1912. It is not a current inspection report, and its percentages describe conditions found during that earlier project. The enduring lesson is a decision process: diagnose the failure, control water, match the intervention to the material’s condition, and record any missing historic fabric for possible future work.
As an Amazon Associate I earn from qualifying purchases.
Quick wins for a faster PC:
Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Clear out junk files and repair common Windows errorsFree Scan →Scan for outdated or missing drivers - takes under a minuteDriver Scan →What building was restored, and why was its façade at risk?
The Candler Building is a 24-story, terra-cotta-clad tower in Times Square. Completed in 1912, it was once the tallest structure in midtown Manhattan. By the early 1990s it stood vacant and deteriorating. The project team described the structural frame as sound, but the exterior enclosure was becoming unsafe and increasingly vulnerable to weather.
The case study reports that roof tiles were falling, failed mortar joints and a leaking roof admitted water, and metal anchors were corroding. More than 75 percent of the terra-cotta and granite joint mortar had failed, while more than 50 percent of the brick mortar was damaged. Most terra-cotta panels had some form of damage. Those are project-era findings, not a statement about the building’s condition in 2026.
Popular on Amazon
- Ergonomically Designed: Work in tight areas with a compact design that gets into tough spots
- Both tools are designed to fit into difficult to reach spaces
- Complete a wide range of applications with a high-performance motor that delivers up to 300 UWO, and an impact driver delivering up to 1,400 in-lbs of torque
- Both the DEWALT impact driver and drill driver feature integrated LED work lights with a convenient 20-second delay, ensuring enhanced visibility in dimly lit or challenging work areas
- One-Handed Loading - Keep one hand free with a 1/4 in. hex chuck that accepts 1 in. bit tips
Water made the deterioration worse. Once moisture reaches joints, backing masonry or corroding anchors, a panel can lose support even when the main frame remains stable. The Candler work therefore treated the roof and façade as one water-management problem rather than as isolated cosmetic defects.
How do you restore a historic terra-cotta façade?
A sound restoration begins with investigation and proceeds from water control to material-specific repair. The Candler sequence, read alongside current General Services Administration terra-cotta guidance and the International Masonry Institute’s restoration guide, can be understood as eight stages.
Do these 3 things before closing this tab:
1Scan for outdated or missing drivers - takes under a minute2Repair Windows errors before they cause bigger problems3Fix the driver behind crashes, sound loss and screen glitches- Survey and document the building. Map panels, joints, cracks, glaze loss, displaced units, anchors, roof conditions and previous alterations. Photograph decorative elements before removal. GSA says its procedures are reference material that must be edited for the project and are not a substitute for specifications prepared by qualified professionals.
- Stop water entering from above. The Candler team replaced the green clay roof tiles with a historically hued adhered system and standing-seam metal battens that reproduced the visual rhythm of the original green clay ornamentation. This addressed a major source of water before façade repairs were finalized.
- Clean carefully and reassess. Cleaning reveals cracks, failed joints, stains and previous patches, but aggressive methods can damage historic glaze or body. IMI emphasizes selecting cleaning and repair methods that do not harm the historic finish.
- Check the support system. A panel that looks intact may still have a failed or corroded metal anchor. The team separated repairable terra cotta from units that could no longer be safely restored.
- Repair salvageable panels. Where a panel was serviceable but an anchor had failed, workers pin-drilled the terra cotta and injected epoxy. After the epoxy set, the pins were removed, leaving the panel stabilized without exposing a new visible fastener.
- Replace irreparable units with compatible substitutes. The project used coated cast-stone panels shaped to fit and resemble the handmade originals. Decorative elements, window lintels and other ornament were recast in GFRC.
- Restore openings and later alterations. Windows added during an earlier renovation were replaced with three-part aluminum windows intended to replicate the original appearance. Metal curtain-wall panels in the center bays were also replaced.
- Record decisions and maintain the work. A repair is not complete when scaffolding comes down. A panel map, photographs, anchor information, product data and locations of substitute materials give future owners a basis for inspection and later conservation.
When should a terra-cotta panel be repaired or replaced?
Repair is appropriate when the historic unit retains enough sound material and can be securely supported. Replacement becomes more likely when the panel is fractured, unstable, missing essential geometry or too deteriorated to carry loads safely. The Candler project used both approaches rather than applying one treatment to the entire façade.
| Condition or decision | Candler Building response | What the choice means |
|---|---|---|
| Panel remains serviceable; metal anchor has failed | Pin-drilling and epoxy injection; pins removed after curing | Retains historic terra cotta while restoring attachment. The repair must be engineered and tested for the specific unit. |
| Cladding cannot be repaired safely | Coated cast-stone replacement shaped to fit and resemble the original | Appearance and geometry can be reproduced without claiming the substitute is original terra cotta. |
| Decorative element, lintel or ornament is irreparable | GFRC recast elements | Lower weight can reduce handling and support demands, but compatibility, finish and attachment still require design review. |
| Crack behavior is uncertain | Diagnosis before selecting a repair | IMI distinguishes stable and moving cracks; they may require different materials and details. |
IMI also treats replacement, spall repair, crack repair, maintenance and testing as distinct paths. A stable crack should not automatically receive the same treatment as a moving crack, and a replacement unit should be selected with attention to the original material’s properties. These are professional decisions, not do-it-yourself instructions.
Why did the project use cast stone and GFRC instead of terra cotta everywhere?
The substitutes were case-specific responses to manufacturing, fit, weight, budget and schedule constraints. Coated cast stone was formed for locations where a replacement panel had to match the original profile. GFRC was used for decorative elements, lintels and ornament; the article says it delivered the required impact strength at up to 50 percent less weight than the original materials.
Also popular on Amazon
- Valued Carpenter Pencil Set: You will get 2 pcs solid carpenter pencils with 26 piece 2.8 mm refills, 1 replaceable sharpener, 1 plastic storage box.The complete carpenter pencils combination allows you to finish your work faster and more easily
- Deep Hole Marker Pencil: The deep-hole construction pencils adopts 45mm elongated tip design, which is more convenient to mark in the small hole or in other tight areas that other carpenter markers cannot reach
- Carpenter Pencils with Sharpener: The sharpener is screwed into the top of the work pencil, which won't get lost either. Built-in pencil sharpener that keep the lead with pointed and smooth to Improves line of sight in fine work
- Stronger Solid Lead: This work pencil is matched with a 2.8 mm thick lead , which is much thicker and stronger during the drawing process of construction work, it will not break or damage easily
- Marks on Various Surfaces: 3 colors solid construction pencil can marks on various surfaces,such as metal, plastic, wood, paper etc. Ideals for woodworkers, contractors, craftsmen, builders, merchants and masons
That weight reduction can simplify lifting and reduce demand on attachments, but it does not make GFRC a universal replacement. A successful substitute must fit the existing geometry, accommodate movement and moisture, receive a compatible finish, and connect safely to the supporting wall. The replacement should also be identifiable in project records so future conservators do not mistake it for original terra cotta.
Material matching is more than color. A team has to consider absorption, thermal and moisture movement, stiffness, joint design, anchor behavior, surface texture and cleaning sensitivity. GSA’s specification page, last modified July 1, 2026, specifically cautions that its generic procedures require project-specific editing and professional judgment.
How were the roof, windows and center bays changed?
The roof intervention came first because failed roof tiles and a leaking roof were feeding the façade’s deterioration. The replacement system kept the historically important green appearance while using adhered clay tiles and standing-seam metal battens to reproduce the original ornamentation.
At the windows, three-part aluminum units replaced windows installed during an earlier renovation. Their purpose was visual: to restore the proportions and rhythm associated with the original openings while providing a contemporary window assembly. Metal curtain-wall panels in the center bays were replaced as part of the exterior renewal.
These changes illustrate an important preservation distinction. Restoring a building’s appearance does not necessarily mean reinstalling the exact nineteenth- or early-twentieth-century product in every location. The project sought compatible, buildable assemblies that respected the historic design while addressing present construction realities.
Also popular on Amazon
- 【Great Compatibility】This Katerk 1/4 inch hex shank bit holder is specifically designed for 1/4 inch hex shank drill bits. It's compatible with most 1/4 fast hex handles, hex sockets, various electric screwdrivers, and handheld screwdrivers. The bit holder makes it a valuable addition for any handyman.
- 【Secure and Safe】Built with a secure backup nut design, each drill bit holder securely locks onto your bits, ensuring they stay firmly in place. Additionally, our bit holder incorporates a high-quality steel ball rolling design that holds up to several kilograms of weight, ensuring your various drill bits don't fall off.
- 【Easy One-Handed Operation】The bit holder for impact driver allows you to change bits single-handedly, simplifying your workflow. Its multi-color design further allows for quick identification of the drill bit you need.
- 【Compact and Convenient】Thanks to its compact size, this 1/4 inch bit holder is easy to carry around. The bit holder allows for easy attachment to various tools, making this a convenient addition to your construction accessories. The Katerk bit holder is cast from high-quality alloy material, promising a long product lifespan. Despite its rugged strength, the bit holder remains lightweight, making it portable.
- 【Cool Christmas Gift For Men Stocking Stuffers】 This screwdriver bit holder, driver bit holder, impact bit holder, can be given as a gift to your loved one, especially for anyone involved in construction or electrical work. It's a must-have for stocking stuffers for men and women, tools gifts for dad, tech gadgets for men, gifts for dad, gifts for him, gifts for husband, gifts for boyfriend, cool gadgets for men, and cool gifts for dad.
What was sacrificed to control cost?
The original decorative S-curve balustrades and finials at the four corner balconies were left out. The project team removed and photographed the remaining details so they could potentially be restored later. The article notes that each balcony had a solid parapet about four feet high, so a railing was not required by the code interpretation used for that work.
This was a preservation compromise, not an invisible repair. Omitting the ornament changed the silhouette, but documenting the removed pieces preserved information for a future phase. It also demonstrates why a restoration budget should distinguish life-safety work, water control, structural attachment and high-value character-defining details. If funding is limited, an owner can protect the building first and defer selected ornament—provided the decision is recorded and the remaining fabric is not damaged by the deferral.
What happened inside the Candler Building?
The interior was stripped back to the structural subfloor and rebuilt. The work included new elevators, fire stairs, restrooms and office space. This interior scope matters because façade restoration rarely occurs in isolation: new circulation, fire protection, accessibility and services may be necessary to return a vacant historic tower to useful occupancy.
Exterior and interior decisions must be coordinated. New elevator or stair cores can affect floor-to-floor planning; window replacements can affect air and water control; and anchor or backing repairs may require access from occupied or newly rebuilt spaces. A phased plan should identify those interfaces before finishes conceal the work.
What does current preservation guidance add?
The 2010 Candler account is a project narrative, not a universal specification. Current guidance helps translate its lessons into a disciplined process:
Also popular on Amazon
- Toolwiz 17-inch magnetic sweeper maintaining a load capacity of up to 8.8 pounds provides a perfect solution to the problem of clearing small ferrous metal objects, such as nails, tacks, bolts, and metal shavings from workshops or garage floors.
- Convenient and portable：17” is good for home, small workshop, or small yard as it is space-saving and more reachable for narrow areas. Perfect for collecting nails or small parts in the car, under the table, and in other nooks or crannies.
- Upgraded Handle Design: The handle features a sturdy, non-telescopic design to completely prevent slipping during use. By simply adding or removing the extension poles, the height can be adjusted to 3 different lengths: 18.9" (48 cm), 32.5" (82.5 cm), and 42.5" (108 cm) from ground to top. This customizable height helps prevent back bending and muscle strain, making your cleaning tasks effortless
- Flexible wheels: Upgrade wheel screws to avoid being too tight to spin or too loose. More comfortable 3-inch rubber wheels roll smoothly on carpet, grass, concrete, and hardwood floors. Just push and pull this rolling magnet-sweeper to pick up metal nails easily.
- Lightweight materials: The magnetic nail sweeper's compact and lightweight design makes the sweeping can be done anywhere you want, Push or pull it under the furniture, passing through the workshop floor, driveway, mud, grass, and gravel.
- Use a project-specific specification. GSA describes its terra-cotta patching and glaze-repair procedures as reference material. A qualified preservation architect, engineer and conservator must adapt them to the building, exposure, access and code requirements.
- Match repair to damage. IMI separates replacement, spall repair, crack repair, maintenance and testing. Stable and moving cracks may need different repair materials and details.
- Protect the historic finish. Cleaning, poulticing, patching, coating and repointing should be selected to avoid damaging the original glaze or body.
- Consider compatibility, not just visual similarity. A replacement unit that looks right can still fail if its movement, absorption or attachment behavior conflicts with the surrounding wall.
- Plan inspection and maintenance. Repaired joints, anchors, roof interfaces and substitute panels need periodic review, especially after severe weather or water events.
How should an owner plan a terra-cotta restoration today?
The following checklist turns the Candler experience into a practical briefing for a building team. It does not replace a condition survey or stamped design.
- Define the significance. Identify character-defining panels, glazed ornament, window patterns, parapets, cornices and roof features before deciding what can change.
- Make the site safe. Address falling pieces, unsafe access and temporary protection while the investigation proceeds. Work at height requires a qualified access and safety plan.
- Trace water paths. Inspect roof coverings, copings, flashings, joints, window perimeters, parapets and drainage. Repairing a panel while leaving the leak above it invites repeat failure.
- Map every unit and anchor condition. Record cracks, spalls, displacement, corrosion, previous repairs and areas hidden by later cladding.
- Test representative repairs and cleaning methods. Use mock-ups to confirm that the proposed epoxy, mortar, patch, coating or cleaning process will not stain, abrade or trap moisture.
- Set repair-versus-replace criteria. Agree in writing which defects permit retention and which require a replacement unit, so decisions are consistent across elevations.
- Design attachment and movement details. Coordinate anchors, joints, backing walls and thermal or moisture movement with the engineer and conservator.
- Procure samples and approve appearance. Compare color, texture, profile, glaze and sheen in natural light. Keep approved samples with the project records.
- Sequence the work. Complete roof and major water-control repairs before final façade finishes, then coordinate windows, curtain-wall panels and interior work.
- Close out with a maintenance plan. Deliver panel maps, photographs, warranties, replacement locations and inspection intervals to the owner.
What does the Candler case prove—and what does it not prove?
It proves that a severely deteriorated historic terra-cotta exterior can be approached as a series of targeted decisions rather than an all-or-nothing choice between total replacement and untouched original fabric. It also shows that visual continuity can be achieved with more than one material when the substitutes are designed, finished and attached appropriately.
It does not establish an industry-wide failure rate, a standard percentage of panels that should be replaced, or a current condition assessment of the Candler Building. The reported 75-percent mortar failure, 50-percent brick-mortar damage and “up to 50 percent less weight” for GFRC belong to this documented project. They should not be used as assumptions for another building.
Windows Errors? Fix Them Before They Spread
Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallOutdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchThe case also does not make epoxy pinning, cast stone or GFRC automatically suitable for every façade. Exposure, original composition, movement, backing construction, local code, access and conservation objectives can change the answer. A qualified team must investigate those variables before specifying work.
Where can you learn more about architectural terra cotta?
For broader technical background, Routledge publishes Architectural Terra Cotta: Design Concepts, Techniques and Applications, covering terra-cotta formation, finishes, applications, project examples and architectural details. It is useful further reading, but the publisher description does not establish that it covers the Candler Building project.
Also popular on Amazon
- APPLY TO MOST DRILLS : 6 pieces screw extractors work with any drill and all the screw size or bolt (3-12mm), These extractor tools are used to reverse the damaged screw counterclockwise until it is released
- The DIY Tools for Men-Men won't know they need screw extractor set until they have one! This screw extractor set is GIFTS WRAP AVAILABLE, can be gifted to your loved ones as it reflects a fresh trend with fun and practical. Amazing and Unique tool gifts for men women. The must have stocking stuffers for men, gifts for dad, husband, father, him, guy teens, adult, Boyfriend, son on Birthdays, Christmas, Fathers Day or anniversary. Perfect Holiday Gifts Guide
- HIGH QUALITY - This damaged screw remover tool kit is made from High-Speed Steel H.S.S 4341# , which have high hardness of 63hrc, it's durable and easily to remove any damaged screws.
- EASY TO USE: Just two simple steps to get the job done - drill a hole with a cutting size using the right size screw extractor and easily remove the screw or bolt using the removal tool Hardness 63-65HRC: Titanium hardened steel material, more durable than most screw extractors on the market, better hardness and durability than others, buy with confidence and complete peace of mind
- Cool Gadgets for Men Dad Christmas Birthday Gifts for Men and Women - Men won't know they need screw extractor sets until they have one! Every screw has the potential to rust and break, which can create a situation where it cannot be removed. Owning it, there will be no anxiety about rusty screws. This screw extractor set is GIFTS WRAP AVAILABLE, can be gifted to your loved ones as it reflects a fresh trend with fun and practical. Amazing and unique tool gifts for men women. A must have stocking stuffer for men on birthdays, Christmas, Father's Day or anniversaries, a gifts for dads, husbands, fathers, him, adults, boyfriends, sons. The best and most practical and surprising Christmas gifts
The original Building Design + Construction case study remains the source for the Candler project narrative. For current technical context, consult the GSA and IMI guidance above and have project-specific documents prepared by qualified preservation professionals.
Frequently Asked Questions
Is the Candler Building’s current condition known from this case study?
No. The source describes conditions found during a restoration reported in 2010. It does not provide a 2026 inspection, maintenance record or current safety determination.
The Tool Desk
Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Can a historic terra-cotta façade be repaired without removing original panels?
Sometimes. The Candler team retained panels that could be stabilized, including units repaired with pin-drilled epoxy around failed anchors. Panels that could not be safely repaired were replaced, so retention depends on condition rather than a blanket rule.
Why is roof work part of a terra-cotta restoration?
Roof failures can send water into joints, backing masonry and metal anchors, accelerating cracking and corrosion. The Candler project addressed the roof before completing façade treatments because a repaired panel will remain vulnerable if water continues to enter above it.
Are omitted balcony railings automatically a code violation?
Not necessarily. In this project, the article says the balconies had solid parapets about four feet high and the railing was therefore not required under the applicable code interpretation. A different building, jurisdiction or alteration could produce a different requirement.
What should be included in handover records after restoration?
Keep elevation maps, photographs, repair and replacement locations, approved samples, anchor details, product data and inspection recommendations. Those records help future owners distinguish original terra cotta from substitute cast stone or GFRC and plan maintenance without guessing.
