I would suggest installing the baseboard and then adding 1 2 x 3 4 base shoe not quarter round.
Install baseboard existing carpet.
Coping an inside corner joint.
These can be reused over and over again so hold onto them.
Fit the molding to the wall flush against the carpet.
The base shoe only adds 1 2.
Tools and supplies to install baseboards.
The carpet installer can run the tack strip up to the trim then roll excess carpet under the trim.
This is the basic method for baseboard installation for carpet applications.
This is generally about an inch for the nail tack and you will use a carpet tucker to tuck the excess carpet into the baseboard.
Drill 1 16 inch holes every 16 inches through the baseboard angled downward toward the wall plate.
Baseboard installed on top of carpet should be installed at approximately the same height with this exception.
Quarter round will stick out farther than necessary where the baseboard ends and door casing begins which is where the baseshoe should terminate either with a chamfered end or a returned mitered end.
If you are not intending to install quarter round or base shoe the baseboard should.
Installing a baseboard trim around carpet areas adds a fancy edge to the room helping to make the carpet part of the room.
When installing carpet after the baseboards are in place there will usually be some instructions that tell you how far you need for both the carpet pad and the carpet itself.
Do not push down on the baseboard so that it presses into the carpeting.
If the molding is slightly long trim it at angled 1 16 inch increments from the end to fit the wall.
Once the trim is fastened remove the short baseboard pieces and move these along as you install the baseboard.
Hammer tack nails through these holes into the wall plate.
Preparing to install baseboards.
Nail the baseboard in place with the sticks resting only lightly on the surface of the carpet.
When installing baseboards before carpet ask the installer how large of a gap to leave between the floor and the trim e g.
Scarf and butt joints.
Safety tips for installing baseboard.