Hi to all of you, my advice for everyone is that: Yes, overlaying will be cheaper as you need not pay for the hacking of the existing tiles. Bu the problem with overlaying is that cement does not stick well on a smooth surface even with chemical adhesive added so theres a possibility of tiles popping out prematurely. You've to decide between saving a thousand plus dlooars & risk having tiles popping out here & there in a year or two or paying a fraction more of the overall amount & having the peace of mind. Design is all about aesthetics & practicality. Do what you've to. Make the right choices & don't occur extra costs for yourselves. Even if you folks would like to overlay your existing floor tiles using laminte, I would 100% advise you folks to go for Supreme Laminate Flooring. But before you do overlaying of laminate for the section or place where you wants to cover the tiles, I'll always advice you to hack & cement screed the place first then you lay the laminate flooring. You also have to make sure that if you're going for hacking, you've to find out the area you're staying in, the timing for hacking & laying of new floor tiles from what time to what time. This is to prevent your neighbours calling the town council & getting yourself fined for nothing as certain neighbourhood area only allows wet works / masonry works to be done during 9am-5pm only.