Technically, it is possible to tile a floor before installing drywall, but it's not a common or recommended practice in most situations. Tiling a floor before drywall installation can lead to some challenges and potential issues. Here are some factors to consider:
Potential damage: Installing drywall after tiling the floor could lead to damage or chips in the tiles if tools or materials accidentally come into contact with the floor during the drywall installation process.
Uneven surfaces: Drywall installation can cause the floor to become uneven, especially if the drywall is not installed properly or if it's not flush with the floor surface. This can result in an unsightly finished appearance and may even cause tiles to crack or come loose over time.
Baseboards and trim: Installing drywall before tiling allows for a neater and more professional finish since baseboards and trim can be installed directly on top of the tiles. If you tile first, you might need to cut and adjust the baseboards to fit properly over the tiled surface.
Height considerations: Tiling first might lead to challenges in the transition between the floor and the wall, as the height of the tiles needs to be taken into account when determining the height of the drywall.
Waterproofing: In some areas like bathrooms or kitchens, it's essential to apply waterproofing materials to the walls before tiling. If you tile before drywall, it can be more challenging to apply the necessary waterproofing layers behind the tiles.
Efficiency: In most cases, it's more efficient to complete drywall installation before flooring to avoid potential delays and extra workarounds.
For these reasons, it's generally recommended to install drywall before tiling the floor. This sequence ensures a smoother installation process, better results, and a more professional finish. However, if you have specific reasons for wanting to tile first, consult with a professional contractor or tile installer to discuss the best approach for your particular situation.