The quarter round can disguise that gap.
Can you use quarter round with carpet.
A 90 angel on the backside with a perfect quarter radius on the showing side.
This type of application is good in areas where the shape can be a visual benefit such as trimming for countertops or along flooring baseboards.
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It works great to fill corners or soften any 90 joint between trim and moldings.
Now what happens when that quarter round which protrudes from the vertical face of the 6 or 8 base molding hits the opening s vertical trim.
Wood floors yours need a gap against the wall in order to allow for expansion and contraction with heat and humidity.
It would be odd to see only a quarter round used imho.
You can also use quarter round when you want a visual trim with a pronounced circular shape to build.
Usually there is a trim molding around the door or a cased opening.
Some put the base molding down first then carpet others put the carpet down then base molding and sometimes base shoe but i find it a bit unsightly.
Quarter round also comes in various sizes which makes it even more versatile for a range of applications.
Quarter round is exactly as its name implies one quarter of a round dowel.
For instance consider how you can or cannot terminate the quarter round at an opening in the wall.
Do you always need quarter round when you are having a wood floor installed if a baseboard is being installed.
In the old days of quality workmanship you had real baseboards with a profile and a quarter round was used to finish off the space.
I have one wood floor installer who insists on using quarter round plus the baseboard for my floor installation whereas my contractor and another floor installer say it s not necessary.
Quarter round is the better choice if you want a curved edge that is well rounded and pronounced.