EXPLORING 1923 HOUSE FRAMING TECHNIQUES
Rebuilding or renovating a home from the early 1920s requires an understanding of how carpenters operated without modern steel hardware, highly standardized codes, or the advanced materials we take for granted today. By looking at a typical 1923 house layout, we can uncover the ingenuity and practical problem-solving of early 20th-century framing. Keep in mind that while not every single home was built this exact way, these methods were incredibly common across the country.
THE FOUNDATION AND WALL STUDS
One of the first major differences you will notice in 1923 framing is the top plate. Today, builders use double top plates to distribute weight and tie intersecting walls together. In the 1920s, carpenters typically used a single top plate, nailing everything directly together.
At the bottom of the wall, the framing studs usually sat directly on top of the sill plate rather than resting on top of a subfloor or floor sheathing. Carpenters would nail the vertical wall studs directly against the side of the floor joists. Because they were not setting walls on top of a flat sheathed deck, they rarely used blocking between the joists, a step that became standard practice in later decades.
WINDOW AND DOOR HEADERS
Modern window headers are often built using solid 4x6 or 4x8 lumber. In 1923, carpenters approached this differently. You will frequently find headers made from a 2x6 or 2x8 installed on the exterior side of the wall cavity, paired with a ripped furring strip on the interior. This furring strip was crucial because it padded out the wall cavity, ensuring the framing was perfectly flush on the inside for the plasterers.
When establishing the rough opening for windows, builders had a few different strategies. Some would run the header and sill all the way across the wall and insert filler studs cut to fit the exact width of the window. Others maintained a strict 16-inch on-center layout, cutting the windows out and utilizing blocks between the trimmers and the nearest wall stud to secure the frame.
CORNER CHANNELS AND LATH BACKING
The interior walls of a 1923 home were finished with lath and plaster, meaning the carpenters had to provide ample nailing surfaces for the thin wooden lath strips. Without this backing, the plasterers would have nowhere to secure the lath in the corners of a room.
To create these interior channels, carpenters often centered two 2x4s on edge, leaving a one-inch reveal on either side. They would then nail the intersecting wall stud directly into this channel to create a tight, sturdy corner. In pinch, builders would simply use whatever scrap wood they had on site, nailing pieces of 1x4, 1x6, or random block cutoffs into the corners to give the lathers the surface area they needed.
PORCH BEAMS AND STRUCTURAL CONNECTIONS
If you look at the front porch framing of a 1920s home, you will see a stark lack of metal building hardware. Joist hangers, post caps, and hurricane ties were not part of the standard toolkit. Instead, porch beams and roof rafters were supported by wooden posts and 2x4 columns, relying entirely on direct wood-to-wood contact and heavily nailed connections to hold the structure together.
THREE KEY TIPS
Do not assume walls are non-load-bearing based on modern framing rules. Because 1923 homes often utilized single top plates and lacked modern header spans, weight distribution is drastically different. Always consult a structural engineer before removing an interior wall.
Prepare for custom blocking during drywall installation. If you are replacing original lath and plaster with modern drywall, you will likely find that the original carpenters left massive gaps in the corners or used uneven scrap wood for backing. You will need to install fresh, plumb blocking in the corners to give your drywall edges a solid fastening surface.
Check your sill plates for drafts and rot. Because the original studs were nailed directly to the floor joists without subfloor sheathing acting as a barrier, the transition between the foundation and the walls is often very drafty. Use this opportunity to seal these gaps and check the original sill plate for moisture damage.
BONUS QUESTIONS AND ANSWERS
As you plan your historic home renovation and study these old framing methods, you might be wondering how these vintage structures hold up to modern standards and materials. Here are a few common questions about retrofitting 1920s framing.
QUESTION: HOW DO YOU UPGRADE THE ELECTRICAL WIRING IN WALLS FRAMED FOR LATH AND PLASTER?
Upgrading electrical systems in a 1923 home is a major priority, as many of these houses originally utilized knob-and-tube wiring. Modern building codes prohibit covering active knob-and-tube with insulation because the wires rely on open air to dissipate heat; doing so creates a severe fire hazard. To meet current electrical codes, the old wiring must be completely disconnected and replaced with modern non-metallic sheathed cable. To route this new wire through the dense, uniquely framed wall cavities and solid top plates without destroying the historic plaster face, you will want to use a highly flexible fiberglass fish tape. This tool allows you to carefully push and pull the new wiring behind the walls with minimal invasive cutting.
QUESTION: WHY IS IT NECESSARY TO ADD FIREBLOCKING TO 1920S FRAMING?
In many early 20th-century homes, the wall cavities were left completely open from the basement all the way up into the attic. Modern building codes require fireblocking, which means installing horizontal barriers within concealed wall cavities. Without fireblocking, a fire starting in the basement can use the open wall stud bays like a chimney, feeding oxygen to the flames and allowing the fire to spread to the roof in minutes. To bring your historic framing up to code and protect the property, you can easily retrofit these open bays by installing fire-rated expanding foam sealant or tightly packing mineral wool insulation at the floor and ceiling levels of the wall cavities.
QUESTION: HOW SHOULD I SECURE OLD PORCH BEAMS THAT WERE ORIGINALLY JUST NAILED TOGETHER?
As noted in the article, early 1920s carpenters relied exclusively on nails for structural connections on porches and roof beams. Over a century, natural wood shrinkage, weathering, and gravity cause these nailed-only connections to pull apart, meaning they no longer meet current structural codes for shear strength and wind-load resistance. You do not necessarily have to tear down the historic porch to fix this. Instead, you can retrofit the joints using galvanized steel structural connectors, like those manufactured by Simpson Strong-Tie. By installing these heavy-duty metal brackets at the post-to-beam intersections, you will instantly bring the structural integrity up to modern code while preserving the original wooden beams.
