Expansion Joint Sealing
Target Pests (7)
| Common Name | Scientific Name | Category |
|---|---|---|
| German Cockroach | Blattella germanica | Cockroaches |
| American Cockroach | Periplaneta americana | Cockroaches |
| House Mouse | Mus musculus | Rodents |
| Carpenter Ant | Camponotus spp. | Ants |
| Silverfish | Lepisma saccharina | Occasional Invaders |
| House Centipede | Scutigera coleoptrata | Occasional Invaders |
| Millipede | Diplopoda | Occasional Invaders |
Application Method
Seal expansion joints in concrete slabs, walls, and between building sections to eliminate pest entry and harborage while maintaining joint function. First clean joint of debris, old sealant, and loose material using wire brush and vacuum. Insert closed-cell foam backer rod to proper depth (typically 50% deeper than joint width). Apply appropriate flexible sealant over backer rod - use polyurethane or silicone caulk that remains flexible to accommodate building movement. Tool sealant smooth and ensure good adhesion to both sides of joint. For control joints in garage floors and basement floors, use self-leveling joint sealant. For exterior expansion joints, use UV-resistant sealant rated for exterior use. Do not use rigid materials that will crack as building moves.
Timing
Seal during initial service or as part of comprehensive exclusion program. Best done during dry weather for proper curing.
Frequency
One-time application with proper materials. Inspect annually for cracking or separation. Reseal as needed every 3-5 years depending on building movement and weather exposure.
Preparation Required
Identify all expansion joints and control joints. Clean joints thoroughly. Measure joint width and depth to select appropriate backer rod size. Have proper sealant and application tools ready.
Follow-up Required
Allow full curing time per sealant manufacturer (typically 24-48 hours). Inspect for voids or gaps. Monitor for pest activity. Re-inspect joints during subsequent service visits.
Safety Precautions
- Ensure adequate ventilation when using sealants
- Wear gloves to protect skin
- Do not seal joints that require expansion/contraction without using flexible sealant
- Follow product curing time before exposing to traffic or moisture