Grouting Techniques
Sanded vs unsanded grout, epoxy grout, grout timing, haze removal, sealing, grout bags, and joint width requirements.
- Select the correct grout type based on joint width and application
- Execute proper grouting procedure including timing and diagonal technique
- Perform haze removal and grout sealing correctly
Lección 1
Grout Types & Selection
Sanded vs Unsanded Grout
The choice between sanded and unsanded grout depends primarily on the joint width.
Sanded Grout
Joint width: 3 mm (1/8") and wider
Sand filler prevents shrinkage cracking
Stronger than unsanded in wide joints
Do NOT use on: Polished marble, glass tile
Unsanded Grout
Joint width: Under 3 mm (1/8")
Smooth texture for narrow joints
Safe for: Polished stone and glass
Will crack if used in wide joints
Epoxy Grout
Epoxy grout is a two-component system (resin + hardener) that provides superior performance but is more difficult to work with:
- Waterproof - does not absorb any moisture
- Stain proof - chemical and stain resistant without sealing
- No sealing required - unlike cement-based grout
- Short working time - must be installed quickly before it sets
- Expensive - costs significantly more than cement grout
- Best for: Commercial kitchens, pools, showers, high-moisture areas
The 3 mm Rule
Remember: joints 3 mm and wider use sanded grout. Joints under 3 mm use unsanded grout. Using sanded grout on polished marble or glass will scratch the surface.
Sanded grout for joints 3 mm (1/8") and wider. Unsanded grout for joints under 3 mm. Never use sanded grout on polished stone or glass - the sand scratches these surfaces. Epoxy grout is waterproof and stain-proof but has a short working time.