Solid Wood or Veneer? How to Tell Before You Sand

The worst moment in a refinishing job is the one where a pale, chalky patch appears under the sander and you realize you just went through the wood. Five minutes of looking before you start will save you that. Veneer isn't cheap junk, either — it's real wood, defined in the trade as
a thin sheet of wood that has been rotary cut, sliced, or sawed from a log
. The catch is how thin.
Face veneers are commonly made anywhere from about 1/16 inch down to 1/125 inch
, and on a lot of mid-century and later furniture you're working with something closer to
0.6 mm, about 1/32 inch
. That's less than the thickness of a stack of two sheets of paper. You do not sand a scratch out of that.

Start at the edges and the end grain

The fastest tell is where two surfaces meet.
On solid wood, the grain pattern runs off the top surface and continues down the edge in an unbroken flow, so top, side and bottom all connect logically
.
On a veneered piece the grain stops abruptly at the edge, and you'll find either exposed substrate or a thin strip of edge banding glued on to hide it
.

Then look at any raw end grain you can find — the underside of a tabletop, a drawer side, the bottom of a leg.
Growth rings are a dead giveaway that you're looking at a solid piece of wood taken from a tree
.
Particleboard, MDF and OSB all have a distinct look at the end that's easy to separate from real end grain
. If the edge looks like oatmeal or like sawdust pressed into a cookie, it's a manufactured core with a face on it.

Carvings settle the question too — you can't carve a sheet that thin, so a carved leg, a turned post or a shaped molding is solid stock.

Read the surface with a raking light

Before you touch it with anything,
hold a bright light at a shallow angle across the surface. Raking light makes pores, seams, old repairs and changes in texture jump out. Don't start by scratching, sanding or lifting an edge — a careful look usually gets you most of the way there
.

What you're hunting for is repetition and seams.
A large panel with a repeating grain pattern is very often veneer
, because sheets get laid up in matched sets — flipped every other strip for a mirrored joint, or laid side by side for a repeating one. Mirror-image figure down the center of a tabletop, a hairline seam running the length of a dresser top, or a decorative banding around the perimeter all point the same direction.

One more thing worth knowing:
furniture is built from components, so a cabinet can have solid legs and face frames, veneered side panels and a plywood back, and a dining table can pair a veneered top with a solid edge and a solid base. The honest answer is usually part by part, not one label for the whole piece
. Check every surface you plan to work on.

What the answer changes about your plan

If it's solid, you have room to sand and level. If it's veneer, strip the old finish chemically and sand only lightly afterward, by hand, with fine paper — the heavy sanding you'd use on solid wood will take you through the face. Keep the sander off the edges entirely; that's where it goes first.

Veneer also behaves differently in our weather, and East Texas gives it plenty to react to.
Wood is hygroscopic — it gains and loses moisture as the relative humidity around it changes
, and
the usual recommendation for furniture is a fairly stable 45–55% RH, with fungi and mildew becoming a real problem above 60%
.
When the carcase wood underneath shrinks, the veneer and inlay on top are what suffer
. That's why so many pieces that have spent summers in an unconditioned garage or a Gregg County barn come in with bubbles and lifted corners.
Keep furniture away from heat vents and anywhere temperature and humidity swing hard
, and remember that
water does rapid, obvious damage to a furniture finish
— so no wet rags left lying on a top, and no potted plants sitting directly on one.

Loose veneer is usually fixable rather than fatal. Conservators handle small blisters with controlled heat and pressure, and
larger ones get slit along the grain first so the piece can be laid back down flat
. It takes patience and a feel for the glue underneath, but it beats replacing the top.

If you look your piece over and find lifting veneer, a sanded-through spot, a failing finish, or you simply can't tell what you've got, Grace Woodwork in Kilgore repairs and refinishes furniture and builds custom pieces, cabinets, built-ins and wood signs. Send a photo through the website for a quote, or call 903-445-7477, Monday through Friday, 9 to 5.