If you’re painting over an old semi-gloss paint, check to see if it has become hard and brittle. Try to pick off a piece from an obscure area with your fingernail. If it chips, it probably needs a light sanding to improve the “tooth” for a new coat of paint.
When installing new carpet, be sure to open your doors and windows. Increasing the amount of fresh air In the home will reduce exposure to most chemicals released from carpet. During and after installation, use window fans and room air conditioners to exhaust fumes to the outdoors. If you have a ventilation system, be sure it is in proper working order. Operate it during installation, and keep it running for 48 to 72 hours after the new carpet is installed.