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10 Tips for Building Tabletops

May 14, 2014 |
posted by Ana White
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Tips on building a tabletop from Ana-White.com

10 Tips for Building Tabletops

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About Project

Author Notes: 

You can build a nice tabletop with a drill, saw and a Kreg Jig. Here's my top 10 tips for building your own tabletop with a DIYers set of tools.

If you've got more tips to add, please do so in the comments - we'd love to hear your tips and tricks too!

Step 1

Build Tabletop First

Build your tabletop before your table base, if you can. Because board widths can vary, sometimes your tabletop comes out a little smaller (or bigger) than you intended. If your base isn't built yet, you can alter the base size to fit the tabletop you built.

Of course, you can always cut down a too big tabletop, or add more boards to make a small tabletop larger.

Step 2

Plan Your Tabletop to Minimize Scrap

If you are building a table without a plan, consider designing your tabletop size so there's minimal board waste. For example, you can get three 31-3/4" cuts out of an 8 foot long board. Or two 47-3/4" long cuts out of an 8 foot long board.

That said, if I had to choose between less scrap boards and getting the tabletop size that perfectly fits my space, I'd go for the perfect tabletop size. Just because it's scrap doesn't' mean it's waste.

Step 3

Find the Happy Medium on Board Widths

Consider building your tabletop out of boards about 6" wide (1x6 or 2x6), or close in size (I use x4 and x8 boards on occasion). If you go smaller, you'll be adding more joints, which means more pocket holes and more sanding. If you go with a wider board, the board itself may cup over time, creating high and low points on your tabletop. I personally find x6 boards to be that happy medium.

Step 4

10 Tips for Building Tabletops

Cut Your Boards Long

Cut your boards a little long. Then when you go to assemble your tabletop, build it so one end of the boards are flush, but the opposite ends are long (and most likely uneven). Then when you finishing joining your boards, you can go back and trim the uneven long ends for a perfect tabletop.

TIP: To save on cutting when your tabletop is 48" (or half the length of your boards), simply cut a 8 foot board in half. Join the boards, with the cut edges flush, and then trim the uncut factory ends off square.

TIP: To help you attach boards square on one end, clamp a square board to your tabletop, perpendicular to the tabletop boards. As you assemble the tabletop, keep one end of the boards flush to the clamped board.

Step 5

Start with Square Edges

If you can, purchase S4S boards, meaning all four sides are square and the board is ready for your to build with. If you have rounded edges on your boards, use a tablesaw to rip the edges square on your boards. It's always nice to work with square edges.

That said, planked tabletops with grooves in between are very "in" right now, if that's the look you are going for.

Step 6

10 Tips for Building Tabletops

Preventing Cupping

That square board you are about to build a tabletop with used to be part of a round tree. Over time, your boards may cup, meaning the center of the board - widthwise - may rise or fall inward, simply because the grain of the wood is curved. To prevent your entire tabletop from cupping one way, alternative the end grain of your boards.

Step 7

10 Tips for Building Tabletops

Use Pocket Holes to Join Board on Underside

I wish we all had a joiner and a planer and a biscuit joiner at our disposal - but the good news is you can still use a pocket hole jig to build a very nice tabletop (the same tool you'll use to build the table's base).

Drill pocket holes along one edge of all but one of the boards. Start with the board that has no pocket holes and work outward, attaching with pocket holes. Use clamps to ensure your joints are even, and work off a level surface.

Use glue between the boards, but make sure you wipe off excess glue (glue will prevent stain from soaking in).

Step 8

10 Tips for Building Tabletops

Strongbacks

We call them strongbacks and we use them on every tabletop we build. It's just a scrap strip of 3/4" plywood, with 3/4" pocket holes drilled about ever few inches. The strongback is attached to the bottom of the tabletop as the glue dries. The square edge of the plywood prevents the tabletop from warping or cupping as it dries. Then we remove the strongbacks (and save them for the next tabletop) when we attach the tabletop to the base.

TIP: If you are concerned about cupping, consider cutting to fit permanent strongbacks, hidden on the underside of your tabletop.

Step 9

Sanding

Sanding is definitely a dirty word around here. If you are sanding a tabletop, you are going to come back covered in sanding dust.

We use a belt sander for the first sanding, using the belt sander to minimize any differences in height between boards. Be careful to only sand in the direction of the wood grain. Any cross marks might not be discernible until you go to stain the tabletop.

After the belt sander, we finish the tabletop with a palm sander in a fine grit sandpaper. Of course, I sand between coats of poly too, so don't put that sandpaper away just yet.

Step 10

Attaching the Tabletop

I love being able to use pocket holes to attach a tabletop from the underside, so no screw holes are showing. This works great for projects that have plywood sides or large aprons, or small tabletops.

But when you get a much larger tabletop (especially ones with small aprons or no plywood underneath)- you've got more opportunity for movement. A small cupping across each board can become substantial across an entire tabletop. Consider attaching your tabletop with tabletop fastners. You just make a small cut in the aprons with a circular saw, insert the tabletop fastner (also called Z-Clip) in the cut, and attach other end to the underside of the tabletop.

Finishing Instructions

Preparation Instructions: 
Fill all holes with wood filler and let dry. Apply additional coats of wood filler as needed. When wood filler is completely dry, sand the project in the direction of the wood grain with 120 grit sandpaper. Vacuum sanded project to remove sanding residue. Remove all sanding residue on work surfaces as well. Wipe project clean with damp cloth. It is always recommended to apply a test coat on a hidden area or scrap piece to ensure color evenness and adhesion. Use primer or wood conditioner as needed.

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freefromburdens1's picture

Great post. Thanks. I really

Great post. Thanks. I really needed this.
Veronica

Veronica

posted by freefromburdens1 | on Wed, 2014-05-14 20:37
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dmcarwin's picture

Love this!

I really love this post, especially the strong back part! Good to know! Pinned!

Mindi@ http://mylove2create.blogspot.com/

posted by dmcarwin | on Thu, 2014-05-15 17:41
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Hokulani1's picture

table fasteners

Great tips! I'm not quite clear when to use table fasteners. I've built your farmhouse table a couple of times which I would think is larger and has no plywood underneath. I assume I didn't need them for it since you didn't mention it. Do you have an example of a project that would need them? Thank you!

Heather

posted by Hokulani1 | on Tue, 2014-05-20 10:33

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posted by Alison3213412 | on Tue, 2014-06-10 07:39

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