Joint survey
Map sealant types, substrates, movement, failures, stains, leakage history, dimensions, access, and interfaces requiring special attention.
24/7 emergency response across Toronto + the GTACall (647) 494-5505
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Specialty construction Movement / adhesion / weather seals
Exterior Caulking Replacement
Removal and replacement of failed exterior sealants at windows, doors, panels, masonry, control joints, and building-envelope transitions.
Built around performance Details that matter
The finish is only as strong as the planning behind it.
Exterior sealants are small components with a large role. They accommodate movement and help keep water and air out at windows, doors, panels, masonry, precast, flashings, penetrations, and material transitions.
Moderno treats caulking replacement as an envelope repair: existing joints are surveyed, failed material is removed, substrates are prepared, backer and joint geometry are corrected, compatible sealant is installed, and representative adhesion and appearance are reviewed.
Applications Where we can help
Planned for real properties and real operating conditions.
- 01
Window and door perimeter seals
- 02
Precast and concrete panel joints
- 03
Masonry control and transition joints
- 04
Metal cladding and flashing interfaces
- 05
Balcony, guard, and penetration seals
- 06
High-rise and low-rise façade programs
Our scope Coordinated delivery
One team across the critical interfaces.
Removal + preparation
Remove failed sealant and unsuitable backer, clean and prepare joint faces, repair localized substrates, and install new backer as needed.
Sealant installation
Prime where required, install compatible sealant to the intended profile, tool the joint, and protect it through cure.
Quality review
Check adhesion, joint geometry, continuity, finish, staining, tie-ins, repairs, and test areas identified by the project team.
Our process Clear from the start
Decisions resolved before they become site problems.
- 01
Investigate
Review drawings, prior repairs, symptoms, joint conditions, substrate compatibility, access, and consultant recommendations.
- 02
Mock up
Confirm removal method, colour, texture, primer, backer, joint profile, adhesion, and the accepted visual standard.
- 03
Replace
Work elevation by elevation or zone by zone with controlled removal, preparation, installation, cure, and weather protection.
- 04
Verify
Complete inspections and specified testing, correct deficiencies, document completed areas, and remove access equipment safely.
Technical considerations No hidden handoffs
What we resolve with the project team.
- 01
Sealant chemistry, substrate compatibility, primers, staining, joint width and depth, backer, bond breakers, and movement range
- 02
Moisture, temperature, surface preparation, adhesion tests, cure time, rain, dust, and protection
- 03
Swing-stage or lift access, anchors, overhead protection, sidewalks, balconies, residents, and phased elevation work
Frequently asked Practical answers
What property teams want to know.
How can you tell exterior caulking has failed?
Common signs include cracking, splitting, loss of adhesion, hardening, missing sections, staining, drafts, and leakage. Some failures are visible only from close access.
Can new caulking be installed over old sealant?
Reliable replacement normally requires removal of failed material and proper preparation of the joint faces. Applying over deteriorated sealant can conceal rather than correct the failure.
Does caulking replacement require testing?
Representative adhesion tests and mock-ups are often useful. A consultant may also specify laboratory compatibility review, field pull tests, water testing, or other quality-control measures.
Have a property improvement in mind?