Laminate: Cheapest option, lots of decors out there and better print quality has led to a much more realistic look. Buy from someone that also stocks the transition pieces (nosing, reducer, t-mould) so you don't have to search around for them after (like everyone that buys at Costco and pays too much for laminate does). Also ensure E1 or CARB certification for formaldehyde content.
Vinyl: Lots of variation in types, 2mm peel & stick, 4mm click, 6mm and 7.5mm click with drop end and composite core. 100% waterproof and waterproof options make it more attractive versus laminate but for a higher price. Can be harder and colder underfoot though. Ensure E1 or CARB certification for formaldehyde and also 100% phthalate free. Phthalates are a carcinogenic agent that Home Depot was found to have in their vinyl products.
Solid Hardwood: Lifetime floor, yes it will scratch and dent (even the hardest species), but can always be re-sanded and finished. Single boards can be removed and replaced by a pro if you wanted to (about $40 per board). Still my personal favourite.
Engineered Hardwood: Very similar to solid hardwood, except that the ply-core allows for better dimensional stability, so you can have wider planks (4" or more) in our drier climate with less issues (gapping, cracking, etc). The top layer veneer of real wood may not allow for a re-sand (or maybe just one), however it can be re-screened and coated professionally and single boards can be replaced just like solid hardwood.
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