When installing carpeting on your steps, start at the top and work your way to the bottom. That way, you can easily control the carpet and create a better seal. This approach prevents the carpet from bunching up or creating wrinkles as you work. You’ll have better leverage over it as gravity helps guide it down each step.

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.

No, thick carpet padding isn’t necessarily better than thinner padding. The appropriate padding thickness will depend on the type of carpet and the amount of foot traffic in the area. 

For example, thick padding works well in low-traffic areas, like bedrooms, where you have soft and plush carpeting. However, thick carpet padding can damage low-pile carpet, which is used in the busiest parts of your home (like hallways and entryways). For that reason, it’s best to use thinner, heavier padding underneath carpet in high-traffic areas.

While it is possible to install carpet yourself, it is a challenging DIY project that requires precise measurement, proper cutting skills, and knowledge of correct installation techniques. The process involves multiple steps, including removing old flooring, installing underlayment and tack strips, and stretching the carpet to prevent wrinkles, which can take several days to complete.

Before starting, consider these factors:

• Warranty: Many manufacturers' warranties are voided if the carpet is not installed by a professional.

• Tools: You will need to buy or rent specialized equipment like a knee kicker, carpet stretcher, and seam roller.

• Complexity: DIY installation is most suitable for simple, straightforward rooms. Projects involving stairs or floor vents are significantly more difficult.

• Cost: While you can save on labor, the cost of tools plus the risk of expensive mistakes—which may require re-installation—can make hiring a professional more cost-effective in the long run.

Given the potential for errors, voided warranties, and the need for special tools, hiring a local carpet installer is often recommended to ensure the job is done correctly and safely.