The movement joints and gaps in a building facade are where weather gets in — and where most exterior leaks begin. Goliath Coatings provides façade joint sealing across Auckland, replacing failed sealant and weatherproofing the joints in precast, cladding and curtain-wall facades to keep buildings watertight.
Why façade joint sealing matters
A facade is not monolithic — it is made of panels and elements that expand, contract and move, with sealed joints between them. When that sealant perishes, cracks or pulls away, water tracks straight through into the structure. Façade joint sealing renews these joints with the correct sealant, restoring the weatherproof line that keeps the building envelope dry.
The right sealant, installed properly
Sealant fails early when it is the wrong grade or poorly installed. We remove the perished sealant, clean and prime the joint, fit the correct backing rod to control depth, and gun in a high-movement sealant rated for the joint width and exposure. Tooled correctly, it bonds to both faces and flexes with the building instead of splitting at the next temperature swing.
Remedial and access work
We reseal precast panel joints, cladding and curtain-wall perimeters, window and door interfaces, and expansion joints — working from access equipment or rope access where height demands. We assess the existing joints first, because the failure pattern tells us whether it is a sealant problem or a design issue that needs a different detail.
The products and systems we use
Movement and construction joints are where façades leak first, so the sealant choice matters. We use BRANZ-appraised Bostik Seal ‘N’ Flex Facade low-modulus sealant for tilt, precast and render joints, and Sika Sikaflex-11 FC and tough Sikaflex PRO-3 for wider or trafficked joints. Joints are sized, backed and primed correctly so the sealant can move with the building and stay weathertight for years.
Why choose Goliath Coatings
Facade weatherproofing and remedial sealing are a specialty. We own our prep and application equipment, specify premium systems matched to the job, and back every project with genuine 5-star Auckland reviews. You get a free on-site assessment and a one-business-day response.
Façade joint sealing FAQs
Q: How often does facade sealant need replacing?
A: Quality sealant lasts many years, but exposure and movement eventually perish it — when you see cracking, gaps or leaks, the joints need resealing.
Q: Can resealing stop my building leaking?
A: Often yes — failed joints are a leading cause of facade leaks. We assess whether it is a sealant failure or a detailing issue and fix accordingly.
Q: Do you do high-level work?
A: Yes — we reseal facades from access equipment or rope access depending on the building and the joints involved.
Q: Why do façade joints keep failing?
A: Usually the wrong sealant or a joint sized incorrectly. We use movement-rated sealants like Bostik Seal ‘N’ Flex Facade or Sikaflex PRO-3, set up with the right width-to-depth and backing rod so they flex instead of splitting.
