Shop Tour: The Dedicated Custom Guitar Builder’s Shop
Building guitars requires a combination of woodworking precision, acoustics knowledge, and metalworking skill that makes a guitar builder’s shop different from any other. This tour covers a 300-square-foot dedicated guitar building studio that produces 15 to 20 instruments per year – from acoustic flat-tops to carved archtops. Every tool in the shop is chosen for the specific demands of instrument-making: tight tolerances, figured wood, bindings and inlays, and the acoustic properties that determine how the finished instrument sounds.
The Workbench Area
The main workbench is 8 feet long and 30 inches wide – narrower than a typical woodworking bench because most guitar work is done at the center of the bench with access from all sides. The bench surface is covered with a thick cork mat that protects the finish on instruments while they’re being worked on. The bench height is 34 inches – standard, but this builder works with a tall stool that brings his hands to the exact right position for delicate work.
Thickness Sanding Station
Acoustic guitar tops and backs need to be sanded to very precise thicknesses – typically 0.090 to 0.110 inch for spruce tops, 0.095 to 0.115 inch for rosewood backs. A thickness sander (a wide-belt sander with a fixed drum height) handles this operation. The builder modified a shop-made drum sander with a digital readout that shows platen height to 0.001 inch – necessary for the thickness consistency that acoustic instruments require.
Voicing and Bracing Area
Acoustic guitar tops are braced on the inside with scalloped spruce braces – the pattern and stiffness of these braces determines the tone of the finished instrument. Voicing (tapping and adjusting brace heights to achieve target resonant frequencies) is the highest-skill operation in guitar building. The voicing bench is in the quietest corner of the shop, away from machinery. The builder uses a small tap tone analyzer – a microphone, a small pickup, and a spectrum analyzer app on a tablet – to measure the resonant frequency of the top at each stage of bracing.
Finishing Setup
Nitrocellulose lacquer is the traditional guitar finish – it’s what most vintage instruments were sprayed with, and it remains the standard for professional instruments. The finish room is a partitioned section of the shop with its own exhaust fan and filtered air intake. Instruments hang on rotating fixtures during spraying. The building temperature is maintained at 65 to 70 degrees Fahrenheit and humidity at 45 to 50 percent – the conditions the finished instrument will be set up in.
Key Lessons
- The cork bench mat is essential in a guitar shop. A single scratch on a finished or partially finished instrument can require hours to repair. The cork surface eliminates that risk at the bench.
- Temperature and humidity control is not optional in instrument building. Wood that’s dimensioned at 60 percent relative humidity will move significantly when it reaches the 45 to 50 percent environment where the finished guitar will live.
- Patience with the voicing process determines the acoustic quality of the instrument more than any single material choice. Rushing bracing leads to instruments that are tonally one-dimensional.
FAQ
Can I build guitars in a standard woodworking shop?
Yes, if you add humidity control and a voicing area. The basic operations – dimensioning wood, routing, shaping – use standard woodworking equipment. The specialized equipment (thickness sander, bending iron for sides) can be shop-made or bought used. The main additions are the precision instruments for voicing and the humidity control for consistent material stability.
How long does it take to build an acoustic guitar?
For a first instrument, expect 200 to 400 hours spread over 6 to 12 months. Experienced builders produce an acoustic in 80 to 120 hours over 4 to 8 weeks. Speed comes from having accurate jigs for every repetitive operation and a clear building sequence that avoids rework.