Seams, Joints, and Caulking
Updated April 01, 2026
Professional-looking moldings come down to how you treat seams, corners, and transitions.
Follow EIFS manufacturer requirements and project specs for seam treatment, reinforcement, and sealant selection.
Choose better seam locations (before you start)
- Place seams where they’re least visible.
- Avoid clustering seams near focal points.
- Consider angled/scarf joints on long runs (they can hide better than straight butt joints).
Treat seams and joints (general best practice)
Depending on your specified system, seam finishing may include: - Filling/skim-coating the joint with the specified compound/basecoat - Embedding mesh or reinforcement at seams (if required) - Sanding/smoothing after cure to create a continuous surface
The goal is a seamless transition that won’t “print through” after painting.
Exterior transitions: seal for weather resistance
For exterior installations, transitions and terminations must be detailed to resist water intrusion: - Seal appropriate joints/transitions with a high-quality exterior sealant as specified. - Pay attention to end cuts, transitions to dissimilar materials, and any area where water could enter. - Do not block required drainage/weep paths of the wall assembly.
Allow movement where required
Buildings move. Follow project specs for: - Expansion/control joints - Required gaps at transitions - Sealant joint sizing and backer rod (if specified)
Skipping movement details can lead to cracking over time.
Next step in the series
After seams are finished, move to coatings and finishing:
Priming, Painting & Maintenance (next post)
Need help?
- Contact: https://moldingstudioco.com/pages/contact
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