Yes, carpeted stairs are generally considered safer than stairs with hard surfaces like wood, vinyl, or tile. Carpet provides more traction, which helps reduce the chances of slips and falls, and its cushioning can lessen the severity of an injury if a fall does occur. Hard surfaces often lack the friction needed for a secure tread and can be quite slippery.

However, it's worth noting that some carpets can also be slick, particularly if they are brand new, dirty, or made from certain materials. If any stair surface feels too slippery, traction treads can be added to most materials to increase grip and improve safety.

The difference between a 40-oz. and 60-oz. carpet is the carpet face weight, meaning the 60-oz. carpet weighs 20 ounces more per square yard. When looking at two similar carpets of the same material and type, the 60-oz. carpet face weight likely indicates higher quality and more durability due to heavier carpet fibers. 

The cost to install carpet is $1,780 on average for 330 square feet, the size of an average living room. This cost could range from $200 to $5,000, depending on the amount of carpet, material, and type of carpet. 

If you need 500 square feet of carpet, it’ll cost $1,500 to $5,500, while 1,000 square feet of carpet costs $3,000 to $11,000. Polyester is one of the more affordable options, ranging from $1 to $3 per square foot. Wool is a more luxurious option, ranging from $4 to $20 per square foot. 

Yes, carpet tiles are easy to install—even if you don’t have much DIY experience. In fact, the simple installation process is one of the main reasons that people choose carpet tiles over traditional carpet. Since carpet tiles come in individual squares, they aren’t as heavy or awkward to install as regular carpet. Plus, you don’t need specialized equipment (like knee kickers or carpet stretchers) when installing carpet tiles.