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EXPANSION JOINTS

Expansion joints are built into structures to absorb predicted movement, usually from temperature changes or from wind-induced pressure.

Concern

The expansion joints are designed into the building to ensure the building has some room for movement to avoid stress fractures, concrete cracks, or other damage. Caulk breaks down over time, and will eventually fail, which can allow water intrusion into a building.
– The caulk in these joints can:

  • dry out
  • get brittle & crack
  • pull apart because of building movement
  • separate from the building

Solution

– In this case, we have a comprehensive process

  • remove the existing caulk
  • clean the joint with xylene or isopropyl alcohol
  • re-caulk the full joint with a masonry silicone caulk or hybrid caulk
  • dry tool the joint for neat appearance

Pro Tip

When hiring a waterproofing contractor to work on expansion joints, please make sure they remove the old caulk first. Caulk needs two clean surfaces for proper adhesion. Having old caulk in the way creates a situation where the new caulk is going to fail quickly, and you’ll be right back at square one.

Materials

Project materials include:

  • Dow Corning 790 Silicone Sealant for Masonry
  • Sikaflex 1a Polyurethane Sealant
  • Tremco Dymonic FC

Silicone caulk has an approximate lifespan of 20 years, under normal conditions. The polyurethane and hybrid caulks have an approximate lifespan of 7 – 10 years. The blazing Florida sun and long-term heat sometimes reduces this lifespan.

CONTACT US

We are on emergency call 24/7 but if you have questions about our products or services, you can use the form to the left to contact our offices. A friendly staff member will return your message as quickly as possible.

(407) 740-6653

Address

875 Jackson Ave. Suite 120, Winter Park, FL 32789

Licenses

General Contractor CGC# 1516978
Florida Mold Remediation License #MRSR 3112

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