If you plan to install baseboard moulding before adding carpet it needs to be installed 1 inch above floor level to allow room for both pad and carpet.
Installing floor molding before carpet.
When you opt to install the baseboards first set them 1 4 inch above the floor so you can finish the carpet installation.
Take it from a 31 year professional installer put down the baseboards first leaving a gap at the bottom for the very best.
Baseboards are often installed before flooring since they must be finished in place with either stain or paint and this is much easier without worrying about staining the hardwood tile or carpet.
For most installers this is not a problem and can be done easily.
Imperfections in your subfloor can lead to problems with your new carpet like gaps or lumps or damage from moisture or odors.
Follow these guidelines to prepare your floor and protect your new carpet investment.
The carpet installer can run the tack strip up to the trim then roll excess carpet under the trim.
Carpet installers prefer to cut the carpet a little long and tuck the excess into the gap for a neater job.
If you are not intending to install quarter round or base shoe the baseboard should be.
When you re installing baseboards over vinyl wood or plastic laminate floors the best way to handle gaps between the drywall and the flooring is to shim the gap with narrow blocks of 1 2 in wood.
If adding baseboards after carpet is laid it should be installed at the same height as without carpet.
In addition the tack strip will be under the baseboards.
Once the carpet and the baseboards are in place you can tuck the edges.
When installing baseboards before carpet ask the installer how large of a gap to leave between the floor and the trim e g.