The fabric is what clients come in for. The frame is what determines whether the job works.
Spend fifteen minutes with your hands on the piece before anything else happens. Feel the joints. Knock on the rails. Look for corner blocks. You're not mapping problems to avoid — you're building a picture of what this job actually is, before you quote it, before you commit to a price, before cover fabric is ordered.
Species and kiln status
Hardwood holds tacks and staples. Softwood doesn't. Not "holds less well" — doesn't hold. A tack driven into kiln-dried hard maple will still be there in twenty years. The same tack in green or underdried softwood will loosen as the wood shrinks around it, and the best upholstery job in the world won't change that.
You can tell by weight, grain texture, and sound. Knock your knuckle on the top rail. Kiln-dried hardwood sounds solid. Green or underdried softwood sounds flat, almost dead. The original manufacturing tier matters too. A well-made original frame uses different material than a flat-pack, and that difference compounds over a re-upholstery lifespan.
Joint integrity
Grab the piece firmly at the front corners and apply diagonal pressure. Rack it slightly. A sound frame is rigid. Any movement means glue failure, joint shift, or both.
The load paths are the back-leg-to-seat joint, the arm-to-seat joint, and the front rail-to-leg corners. Check these. Any looseness here means frame repair before upholstery proceeds. You can put beautiful fabric over a compromised frame. You can't prevent the client from calling you about it twelve months later.
Corner blocks
These are the triangular wood blocks glued and screwed into interior corners to reinforce the joints. Good frames have them. Budget pieces often don't, or have them on two corners instead of eight. Press on each corner from the outside. A loose block clicks slightly. Missing or failed corner blocks are one of the most common sources of diagonal racking, and they're straightforward to add or replace. Do it before the foundation goes in.
Tacking rail condition
Run your hand along the top edge of the seat rails, the back, the arm rails. This is where tacks and staples go. If the rail has been stapled four times over sixty years, the wood can be shot — split, chipped out, no fiber left to grip. A wood filler consolidant can rescue a depleted rail in mild cases. In bad cases, the rail needs to come out and a new one goes in. Know this before you quote.
The four conditions
After the assessment, every frame falls into one of four buckets.
Sound. No joint movement, corner blocks intact, tacking rail in good shape. Proceed to foundation.
Sound with minor repair. One or two loose joints, structure otherwise intact. Reglue, clamp, 24-hour cure minimum. In the combined NWCO and Welt workflow, this is bench work. The frame goes to the woodworking side, gets repaired, comes back to the upholstery station. The handoff is a day, not a week.
Structurally compromised. Multiple loose joints, failed corner blocks, racking that full repair can address. Quote the frame repair as a separate line item and present it to the client before you touch anything else. Some clients accept the risk and choose economical cover fabric on a compromised frame. That's a legitimate choice — if they made it consciously, with clear information. Surprises are not. Don't create them.
Not worth the work. Water damage, cracked structural members, repair cost that exceeds what the piece is worth. This happens. Say it plainly, explain why, help them find a different path. A client who gets a straight answer on a lost cause will call you when they find something worth saving.
Document before you start
Photograph the piece before anything comes off. Four angles: front, back, seat top, detail of any damage or previous repair. These photos are your scope record, your baseline if hidden damage surfaces mid-job, and your before shot for the file. They're also your measurement source for seat dimensions, cushion crown, and trim placement — before the original fabric is off and the original layout is gone.
The fabric is the first thing anyone notices. The frame is why they'll call you again.