Installing a Facade: The Site Checks That Prevent an Expensive Rebuild

Facade problems are the hardest defects to correct, because access, sequence and weather protection all have to be rebuilt to reach them.

A facade does four jobs at once: it keeps water out, allows the building to move, resists wind load and looks like the design. Site errors usually break one of the first three while leaving the fourth intact, so the problem is invisible at handover and expensive afterwards. The checks that matter happen at fixing, sealing and the first panels rather than at the end.

Why these keep happening

These mistakes come from treating cladding as a covering rather than as a system with a defined performance. The panels arrive, they fit, the elevation looks right, and the parts that actually keep water out and hold the panel on the building are the parts nobody inspected.

1. No approved shop drawings before fabrication

The design drawings show the appearance and the supplier is trusted to work out the rest.

• Avoid it by: Require shop drawings and calculations reviewed and approved before any fabrication, including fixings and movement provision.
• Proof it is closed: Stamped shop drawings and a fixing design in the project file before the order is released.

What it costs you: Panels arrive that do not accommodate the structure tolerances, and the fix is improvised on site with packers and sealant.

2. Ignoring the structural tolerance survey

The structure is finished and assumed to be where the drawings said it would be.

• Avoid it by: Survey the structure before fabrication and issue the actual dimensions to the fabricator.
• Proof it is closed: A survey record issued to the supplier with a written confirmation that fabrication used it.

What it costs you: Cumulative deviation means the facade zone is too tight in places and too wide in others, producing visible misalignment and improvised fixings.

3. Fixings substituted on site

The specified anchor is unavailable or will not suit the substrate encountered, and the crew finds an alternative.

• Avoid it by: Prohibit fixing substitution without written engineering approval, and inspect a sample of fixings before they are concealed.
• Proof it is closed: Fixing inspection records and any approved substitution documented with a calculation.

What it costs you: The panel is held by something never assessed for wind load, corrosion or the movement it must accept, and nobody records the change.

4. Building a mock up only for appearance

A sample panel is erected so the client can approve the colour.

• Avoid it by: Use the mock up to test water tightness, fixing method and junctions with windows and roof, and record the test results.
• Proof it is closed: A mock up test record covering water, fixing and junction details as well as appearance.

What it costs you: The mock up approves the look and tests nothing, so water penetration and movement problems appear once the whole elevation is built.

5. Sealant applied as the primary defence

Sealant is quick, forgiving and hides imperfect joints.

• Avoid it by: Require a designed drainage and pressure equalisation strategy so the system sheds water without depending on a bead.
• Proof it is closed: Drawn details showing drainage paths and the role each seal actually plays.

What it costs you: Sealant has a finite life and moves with the building. A facade relying on it for water exclusion starts leaking when the sealant ages, which is well within your ownership.

6. Junctions with other trades left undefined

The facade package and the window, roofing and waterproofing packages have separate suppliers and separate drawings.

• Avoid it by: Hold an interface review before installation, with each junction drawn and each responsibility named.
• Proof it is closed: An interface drawing set signed by every affected package contractor.

What it costs you: Every interface becomes a gap that somebody fills on the day, and interfaces are where facades leak.

7. Nobody inspecting behind the panel

Once panels are up the elevation looks complete and inspection moves on.

• Avoid it by: Inspect and photograph each zone before the panels close it, treating closure as a hold point.
• Proof it is closed: Photographic records of the cavity and insulation for every zone before closure.

What it costs you: Insulation gaps, breather membrane damage, blocked drainage cavities and missing fire stopping all sit behind a finished face.

A short check before you sign

• Were shop drawings and fixing calculations approved before fabrication?
• Was the structure surveyed and the actual dimensions issued to the fabricator?
• Is there a record of every fixing type used, including any substitution?
• Did the mock up test water tightness as well as appearance?
• Are drainage paths drawn, so sealant is not the primary defence?
• Is there a photographic record behind every panel zone before closure?

If it has already happened

If a facade is leaking or panels are moving after handover, resist the temptation to seal and repaint. Commission an investigation that opens a sample of the affected area and establishes whether the cause is fixing, drainage, detailing or damage, because the remedy differs completely between them. Then check the warranty position and the contract before approaching the installer, since how you raise it affects whether the repair is theirs or yours. A licensed adviser should review your position before you accept any proposed repair as a settlement.

Domira designs, builds and manages projects across Saudi Arabia for owners who are based abroad: land appraisal, feasibility, design, construction, handover and asset management under one accountable contract. Send us the plot or the brief and Domira will put the numbers in front of you before you commit.