Measuring for the molding pieces
you will need is a lot easier than you think. At first it might seem a bit
overwhelming, but once you know how each type of molding is used, it's a
snap! First, if you are measuring for Wall Base or Quarter Round, that's
really easy. Simply measure each wall, write down each measurement, and then
total them up. We recommend that you also add about 10% waste to your total.
After you have the total running feet you need, divide it by the length that
the molding is sold in. You can do the math either in inches or in feet. For
example, if you came up with a total of 960" or 80' that you need, and the
molding is sold in 96" or 8' lengths, you would need 10 pieces of molding.
If you don't end up with an even number, it is always recommended that you
round up to the next piece.
Measuring for Moldings/Trim
When it comes to transition type molding, it's a little different. You will
need to write down each doorway or opening measurement, and also the type of
transition molding that will be used for each one. As a rule of thumb, one
piece of transition type molding will usually do two doorways, as long as
the doorways are less than 36". Also, if you have an opening that is wider
than one piece of molding, we recommend that you split it in the center as
opposed to one big piece and a small cut piece. You may have a little bit
more waste doing it this way, but overall it will look better with the seem
being in the middle.