What Is a Timber Frame? A Complete Guide

Timber framing is one of the oldest building methods in the world — and it's enjoying a massive modern resurgence. Here's everything you need to know: what it is, how it's built, the different styles, and why people are choosing timber frames over conventional construction.

Timber Frame Definition

A timber frame is a structural system where large wooden timbers (typically 6×6 inches and larger) are connected using traditional wood-to-wood joinery — mortise and tenon, dovetails, and scarf joints — secured with hardwood pegs. Unlike conventional stick framing, the timber frame carries the entire structural load, allowing for wide-open interior spaces with cathedral ceilings.

Key characteristics of a true timber frame:

Heavy timbers: Posts, beams, braces, and trusses made from 6×6 up to 12×12+ timbers
Wood joinery: Connections are wood-to-wood, secured with oak pegs — not metal brackets
Exposed structure: The frame is left visible as the finished interior surface
Non-structural walls: Interior walls don't carry load — they're just room dividers
Cathedral ceilings: The frame naturally creates vaulted, open overhead space

Timber Frame vs. Post and Beam

These terms are often used interchangeably, but there's a technical difference:

Timber framing uses traditional wood joinery — mortise and tenon connections secured with wooden pegs. No metal fasteners in the structural connections. This is the historical method used in medieval barns and halls across Europe and Asia.

Post and beam construction uses heavy timbers but connects them with metal brackets, plates, and bolts. It's faster to engineer and assemble but lacks the craft aesthetic of true timber framing.

At New England Timber Frames, we build true timber frames — traditional joinery cut with modern CNC precision. The result is the authenticity of hand-cut joinery with the accuracy of computer-controlled machining.

History of Timber Framing

Timber framing dates back thousands of years. Examples survive from:

Neolithic Europe (7,000+ years ago): Early timber-framed longhouses
Medieval England & France (12th-15th centuries): Great halls, barns, and guildhalls — many still standing
East Asia (8th century onward): Japanese temple carpentry — some of the most sophisticated timber joinery ever developed
Colonial America (17th-18th centuries): New England barns and homes — the tradition we continue today

The method declined in the mid-20th century as cheap dimensional lumber and nail guns made stick framing the default. But since the 1970s, timber framing has experienced a revival — driven by people who want homes with character, craft, and permanence.

How a Timber Frame Is Built

1. Design & Engineering

Every frame starts with structural engineering. A professional engineer calculates loads, specifies timber sizes, and designs every connection. The result is a set of stamped plans that satisfies building codes in all 50 states.

2. Timber Selection

Timbers are selected for grade, grain orientation, and moisture content. We use kiln-dried timber (12-15% moisture) to minimize checking and movement after raising. Common species: Douglas Fir or Pine, Douglas Fir, Oak.

3. CNC Cutting

Each timber is cut on a CNC (Computer Numerical Control) machine. Every mortise, tenon, housing, and peg hole is machined with CNC precision. The timber is then labeled with its assembly position.

5. Shipping

The labeled timbers are loaded onto a flatbed truck and shipped to your site. Each piece has a number that corresponds to the assembly drawings.

6. Raising Day

This is the dramatic part. A crane lifts each timber into position, and the crew taps oak pegs through the pre-drilled holes. A typical house frame goes up in 2-5 days. It's fast, efficient, and — let's be honest — incredible to watch.

7. Enclosure

Once the frame is up, it's wrapped in an insulated envelope — typically SIPs (Structural Insulated Panels). This creates a weather-tight shell, and from there, your project proceeds like any custom build.

Types of Timber Frame Trusses

The truss is the defining architectural feature of a timber frame. Common types:

King Post Truss: A central vertical post supports the ridge. Classic, clean, works well in 20-30 ft spans.
Queen Post Truss: Two vertical posts support the ridge via a horizontal beam. Allows for wider spans and a more open feel.
Hammer Beam Truss: Cantilevered beams create a dramatic open span without a center tie beam. The most impressive — and most expensive — truss type.
Arch Truss: Curved or arched timbers create a vaulted ceiling effect. Common in modern timber frame designs.
Scissor Truss: Crisscrossed rafters create a vaulted interior with a lower exterior roof profile.
Common Rafter: The simplest system — rafters running from ridge to plate. Used in colonials and simpler frames.

Timber Frame Styles

Colonial: Symmetrical, steep roof pitch, central chimney mass. Classic New England look.

Barn: Gable roof, open interior, often with a loft. The quintessential timber frame application.

Great Room / Lodge: Massive open space with cathedral trusses — the showpiece timber frame style.

Modern / Contemporary: Clean lines, mixed materials (steel, glass), minimalist truss designs.

Hybrid: Timber frame great room attached to a conventionally framed wing — the most cost-effective way to get a timber frame home.

Why Choose Timber Frame?

Longevity: Timber frames last centuries. There are frames from the 1600s still standing in New England.
Beauty: The exposed wood structure is the finish. No drywall on ceilings. The frame is the architecture.
Open space: Non-load-bearing walls mean open floor plans, huge windows, and design freedom.
Sustainability: Wood is a renewable resource. A timber frame sequesters carbon for its lifetime.
Craft: In an era of disposable construction, a timber frame is a statement of quality and permanence.

Is a Timber Frame Right for You?

Timber frames work for homes, barns, workshops, pavilions, event spaces, and commercial buildings. They're not the cheapest option upfront, but they're the best value over a lifetime. If you're building for the long term — a forever home, a legacy project — timber frame is the choice.

Ready to learn more? Explore our frame kits or read our getting started guide to see how a timber frame fits your project.