How To Cut Trim Angles?

How To Cut Trim Angles- Step By Step Guide

Trim cuts can be classified into various types. They can either be an outside cut or an inside cut. Or they could be an acute angle or an obtuse angle. For trim cuts using baseboards, outside or inside cut doesn’t make a difference in the cutting process as long as it is measured correctly. More important is whether the trim angle is an acute angle or an obtuse angle. We will discuss how to cut both an acute angle and an obtuse angle.

Step 1

Wear all the necessary personal protective gear. Turn off the miter saw. Using the angle measure, measure the trim angle depending on if it is an outside angle or an inside angle. Any angle which is 90 degrees or less is considered an acute angle. Any degree which is more than 90 degrees is considered an obtuse angle. Using a marker and tape measure, measure and mark the length of the baseboard to the cut.


Shim the Floor Gaps to Avoid Tilted Baseboards

  • Using chunks of 1/2-inch scrap plywood, cut the blocks and tuck them into the gap every few feet.
  • Install the baseboard right over them, tight against the floor molding.
    • Note: It’s best to keep the nails at the bottom of the base above the gap so they go through drywall, not air.


This is way of How to Cut Baseboard Corners without Miter Saw, Introducing baseboards in your house is a moderately clear approach to tidy the spot. While it might seem like the general procedure is simple enough for a DIYers, cutting baseboards can be a daunting task.

Best cordless miter saws with handy stands are very effective in cutting boards or metals. However, in a situation whereby there isn’t a miter saw, the guidelines above, when properly followed will undoubtedly help you cut your baseboards to your utmost satisfaction.

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How do you fix a bulging drywall seam?

Add new drywall tape to the seams, then use a wide knife to feather out joint compound to prevent new bulges. Once the seams are smooth and relatively flat, sand lightly, then prime and paint to restore the look of your wall.

Is mesh drywall tape better than paper?

Paper is not as strong as fiberglass mesh; however, it is nonelastic and will create stronger joints. This is especially important at butt joints, which typically are the weakest areas in a drywall installation. Paper tape can be used with either drying-type or setting-type compound.

Step 1: Save All Your Cardboard Boxes

To start this project I collected a lot of large corrugated cardboard boxes and started saving all the brown packing paper from packages we received. I had an unfinished wall in one of our room so I thought I would give the cardboard a try.

Get Perfect Inside Corners

    • Note: The key to a clean inside corner is to use test pieces of baseboard molding to help you prepare the corner for the permanent base before you nail anything to the wall.
  • Cut a perfect cope on the end of a foot-long chunk of baseboard.
  • Use that and another short piece of base with a square end to check the corner.
  • Push the pieces tight against the wall (especially at the bottom) to simulate the pressure the nails will exert.
    • Note: If the joint looks good, go ahead with the standard installation.
  • If there’s a gap at the bottom of the joint, set aside the test pieces and drive a 2-inch screw about 1/2 inch above the floor and an inch or two away from the corner, behind the square-ended piece.
  • Sink the screw until the head is protruding slightly beyond the drywall
  • Check the joint again with the test pieces.
  • Adjust the screw in or out and continue adjusting and testing until the joint is perfect.
  • Install the baseboard.

Fasten the baseboards to the walls, using nails ev

Step 5 Fasten Baseboards

Fasten the baseboards to the walls, using nails every 4 inches. You may need someone to help you hold the pieces while you insert the nails. If you don’t have a working partner, glue the pieces to the wall, and after the glue is dry, hammer in the nails.

Step 11: Install Baseboard and Trim

To install the trim I used more roofing nails and then finished the trim with more packing paper and mod podge to cover the nail heads and seams.

Step 1: Butt the First Board

Lay your first piece of baseboard in the inside corner. This piece should be cut square (0°) and fit snug against the opposite wall.

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How to Cut Trim With a Miter Saw to Absolute Perfection!

Next How to Use a Miter Saw Like a Woodworking God!

Step 4: Sand for a Tight Fit

Sand the edge and try out the piece. Note any places that need to be sanded or filed down further.

How to Cut Baseboard Corners with a Hand Saw

If you don’t have a circular saw, don’t worry. You can still cut baseboard corners using a hand saw and a miter box, instead of forking out the cash for circular saw or a high-priced sliding compound miter saw.

However, you’ll need some glue, an adjustable bevel, some wood screws, a screwdriver, a carpenter’s square, and 1×6 and 1×4 lumber.

Follow the instructions closely: 

  1. Cut two 12-inch lengths of 1×6 lumber and 12-inch length of 1×4 lumber. The type of wood doesn’t matter, but if you can, get oak or fir. It’s more important to get wood which is warp-free, and completely straight.
  2. Apply wood glue along the two long edges of the 1×4 lumber and place it flat on the work table. Place the 1×6 lumber upright against every edge and use a screwdriver and ½ wood screws to screw the 1×6 in the 1×4 lumber. When finished, you’ll have a four-inch open box. 
  3. Place the bevel to 45- degrees and mark the top edge angles on the two sides of the box with a pencil. Use a carpenter’s square to draw a perpendicular line on the outside of the box, from the angled line intersection to the bottom of the makeshift box.
  4. Align your handsaw with the angled marks at the boxes’ top edges, and cut through the sides top to bottom. Make sure the ends of the hand saw are aligned to the perpendicular lines on the side.
  5. Using the box and the handsaw to cut the baseboard. Keep the baseboard up against the side of the box, using the mark on the baseboard to show you the length of the kerf in the box. Hold the saw within the kerf as you cut the baseboard. 

Note: If this is too complicated for you, simply buy a miter box at a supply store which can produce similar results to using a miter saw, but without the added financial investment.

Also, the best type of saw for this job is dovetail or backsaw, but pull saws will also work. 

The second step is by cutting the inside joint

  • The inside corner joint is also referred to as the coped joint. It cannot be said to be a butt joint because of the presence of a gap between the two baseboard pieces. To escape those gaps you are supposed to construct an inside joint.
  • Put one piece of baseboard against the wall at a right angle.
  • Set the other piece of board and place it down on the floor.
  • Hold and mold the scrap piece of the board perpendicularly and trace its profile by use of a pencil.
  • For you to find a reference point, this will help you to trail and facilitate the completion of the inside corner joint.
  • Cut and shape a 45-degree angle piece of baseboard by use of appropriate miter saw.
  • Rotate the angle to a clockwise direction till it is elevated to the left-hand side and towards the right-hand side of the machine.  Cut all through to create the best corner angle.
  • Cut along the profile and create a bevel cut and short a profile at a 90-degree angle. To connect and engage the cut trim together to identify holes and gaps in between the baseboards.
  • For best and smooth baseboard inside corner, trim accurately one of the boards, hold the other board straight and position it on the floor and allow it to connect with mating piece.
  • The final step is to remove the back bevel that will install a half round and other files till the boards fit the other with no gap.
  • Put some glue before you join the two baseboard pieces before you do finishing.Inside corners are places where 2 walls intersect to create a concave angle.
  • Nail your piece boards and ensure that the boards are correctly set exactly as when leaned to the wall.
  • It’s advisable to use 1.5-inch brads while closing the corners.

Step 3 Cut a Smaller Piece for the Corner

You need a smaller piece to fit between the 2 previously cut baseboards. The piece should be cut from the same material, and it will be 1 to 2 inches in size, depending on how rounded the corners of your walls are. Make sure that you cut the piece at an angle of 22.5 degrees at both ends. You can use a sander or sandpaper to make the edges of the baseboard pieces smoother.


  • To get the appropriate and correct baseboard corner, be keen while taking measurements and marking. Make sure all corners are at the required angle.
  • There is a high probability that during the first process of cutting, the cuts created by the use of the best portable miter saw may differ. Shape and trim accordingly with accurate measures till the baseboard piece fits.
  • Most of the cut corners hardly get perfect. All you need is to cover the gaps with caulk and other equivalent means.
  • Be keen and take time during the working period to minimize the number of mistakes. You are allowed to reduce the trim to the required length.

Elements of Baseboard Corners


Majority of business baseboards are profiled castings produced using any sort of hardwood, including oak, mahogany or maple. Some creation shaping is pine or fir. It is processed in huge amounts and passes by the names of “farm,” “pioneer,” “commemoration” or “ogee,” among others. It is regularly somewhere in the range of 2 and 3 creeps in width and is generally created in 96-inch lengths. For extra effects, profiled embellishment can likewise be stacked for a progressively intricate appearance. The primary bit of casting is introduced and afterward another piece is set on its edge, over the principal piece, to make shadow lines.


Composite moldings are somewhat like vinyl, yet don’t twist effortlessly. They twist more than ordinary wood, however not as much as vinyl. They have a slender vinyl covering, with a thick particleboard center. Complex moldings can’t be retooled; however, and are left normally white or colored. They are more considerable and give more warm assurance than vinyl and can be cut and mitered, much the same as genuine wood. Composites are the most reasonable of all the baseboard types.


Vinyl shaping is typically white in shading, yet has one major benefit as a baseboard: it’s flexible. You can frame this flexible trim around smooth bends or cause it to fit in with a wall that isn’t square. It fits firmly against a wall and won’t split, since it twists where wooden embellishment won’t. It very well may be painted and it is anything but difficult to miter or cut with practically any sort of saw. It’s moderate for two reasons: there are no imperfections, and you can utilize each and every inch of it in view of its consistency. Vinyl shaping is accessible in any profile that standard wood forming comes in.

Final Thought

Cutting trim angles can be difficult if you do not know how to use a miter saw, or how to calculate the angle setting for an accurate trim. It is essential to note the difference in calculating the angle of the trim cut as the formulae change depending on if it an acute angle or an obtuse angle. Remember that any angle above 90 degrees is an obtuse angle and any angle which is 90 degrees or below is an acute angle. We hope that this article has given you enough knowledge to overcome that hurdle.


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