To address gaps between tiles after installation, apply a flexible adhesive such as thinset mortar or epoxy filler to fill the voids. Ensure the adhesive matches the tile material and surface texture. Once the adhesive sets, clean excess material and apply a grout sealer to prevent moisture penetration and enhance durability. Regular maintenance, including reapplying sealers every 1-2 years, is critical for long-term protection.

The primary reason gaps occur is due to improper installation techniques or material incompatibility. Flexible adhesives compensate for thermal expansion and substrate movement, reducing crack risks. A 2022 study by the Tile Council of North America found that 60% of tile failures involve moisture-related issues, often linked to untreated gaps. Grout sealers create a waterproof barrier, with research from the Journal of Building Materials (2021) showing a 75% reduction in mold growth when sealers are applied. Additionally, improper adhesive selection can lead to shrinkage, exacerbating gaps. For example, a 2020 report by the National Tile Association highlighted that 45% of gap-related complaints stemmed from using non-durable fillers. Proactive sealing and adhesive selection, therefore, directly correlate with structural longevity and aesthetic preservation.