When renovating or upgrading a space, one common challenge is working with existing tiled surfaces. Instead of removing old tiles, which can be time-consuming and costly, applying a screed over them can be an efficient and effective solution.
Why Screed Over Existing Tiles?
Screeding over tiles offers several advantages:
- Cost-Effective: Eliminates the need for labor-intensive tile removal.
- Time-Saving: Speeds up the renovation process.
- Versatile Base: Creates a smooth, level surface ideal for various floor finishes like vinyl, laminate, or carpet.
- Minimises Waste: Reduces debris and waste removal from tile demolition.
Key Considerations Before You Begin
Before applying a screed over tiles, assess the following:
- Tile Condition: Ensure the existing tiles are secure, without cracks or movement.
- Cleanliness: Remove all grease, dirt, and contaminants from the tile surface.
- Height Restrictions: Adding screed will increase floor height, so check for door clearance and transitions.
- Adhesion: The tiles must provide a surface that screed can adhere to effectively.
Step-by-Step Guide to Screeding Over Tiles
1. Inspect and Prepare the Tile Surface
Check for loose, cracked, or damaged tiles. Remove and replace any tiles that are unstable. Ensure the tiled surface is completely dry, free of debris, and cleaned thoroughly with a degreaser to remove oils or wax.
2. Apply a Primer or Bonding Agent
To ensure strong adhesion between the tiles and the screed, apply a suitable tile primer or bonding agent across the entire surface. Follow the manufacturer’s instructions for drying times.
3. Mix the Screed
Prepare the screed mix according to the product guidelines. Ensure the mix has the right consistency—neither too wet nor too dry—to make it easy to spread and level.
4. Apply the Screed
Using a trowel, spread the screed mix evenly over the tiled surface. Work systematically, starting from one corner of the room and moving towards the exit. Ensure the screed fills any grout lines and gaps between tiles.
5. Level the Screed
Use a screeding tool or straight edge to level the surface. Smooth out any bumps or irregularities for a consistent finish. For large areas, divide the floor into manageable sections.
6. Curing and Drying
Allow the screed to cure and dry according to the product’s recommended time. Quick-drying screeds are available if time is a constraint, but ensure the surface is fully cured before applying any flooring finish.
7. Final Inspection
Once dried, inspect the screed surface for any imperfections or unevenness. Sand or patch as necessary to achieve a flawless finish.
Tools and Materials You’ll Need
- Screed mix (cement-based or self-levelling screed)
- Tile primer or bonding agent
- Clean bucket and mixing tools
- Trowel or screeding tool
- Floor levelling compound (if necessary)
- Protective gloves and goggles
Tips for a Successful Screed Over Tile Project
- Choose a high-quality screed mix suitable for your application, such as fibre-reinforced or self-levelling screed.
- Ensure the screed thickness meets the manufacturer’s minimum requirements for strength and durability.
- Maintain proper ventilation during curing to avoid moisture buildup.
- If in doubt, consult a professional screeding contractor for advice or assistance.
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