First in the event of carpet installation the gap will need to be there for the edges of the carpet to be tucked under.
Install base molding or carpet first.
How to install carpet first.
Then touch up base if need be.
The first is to install the baseboards flush to the subfloor prior to carpet installation.
Some professionals may have a strong preference but ultimately baseboards can be installed before or after carpet.
1 the act of installing the carpet destroys the molding or 2 it looks like shit afterward because of a poor fit between the new flooring and the old molding.
Baseboard first set on 3 8 wood lath strips tack less set between 3 8 1 2 inch away padding brought up to tack less and carpet installed and stretched over tack less and tucked under base.
Baseboard trim has nothing to do with holding carpeting in place.
Generally the installation of carpet or baseboard is easier for whoever installs first.
Believe it or not a crowbar works great to help push the carpet into the gap.
Hold the first board against the wall level it then temporarily tack it in place.
Ask your carpet installer their preference to begin the discussion.
Which comes first carpet or baseboard.
There are three main ways to install new baseboards.
The trimmer is not going to make a special trip back to install the base after carpet is installed.
Second drywall would wick up moisture from flooded floors or carpet.
If adding baseboards after carpet is laid it should be installed at the same height as without carpet.
Or you may be replacing the baseboards but leaving the carpet.
How to install base board trim for carpet areas.
There may be instances where you want to put the carpet down first.
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.
This could result in a tight fit based upon how close to the wall the tack strips are placed normally the old tack strips are not replaced when installing new carpet.