Restoring a Colonial Stone Farmhouse: Lessons from the Best Traditional Home 2015

The revival of historic homes offers invaluable lessons in craftsmanship, material selection, and design sensitivity. Among the most inspiring examples of residential preservation is the restoration of a Revolutionary War-era stone farmhouse a project that earned the Best Traditional Home award in 2015. This article examines the key strategies and techniques behind this colonial farmhouse restoration, exploring how preservationists and builders can breathe new life into aged structures while honoring their original character.

1. Assessing the Structural Condition of Historic Stone Farmhouses

Before any restoration work begins, a thorough assessment of the existing structure is essential. Historic stone farmhouses, particularly those built before 1800, present unique challenges that differ significantly from modern frame construction.

Foundation and Wall Integrity

The load-bearing stone walls of an 18th-century farmhouse are typically 18 to 24 inches thick, constructed with fieldstone or rubble masonry set in lime mortar. Over centuries, several issues commonly arise:

• Mortar deterioration: Lime mortar naturally erodes over time and must be repointed with compatible material, never with modern Portland cement, which traps moisture and accelerates stone spalling.
• Bulging or leaning walls: Settlement over 200-plus years can cause wall displacement. Stabilization may require helical ties, grout injection, or localized rebuilding.
• Water infiltration at grade: Rising damp from the ground wicks up through porous stone. A French drain system or perimeter footing drainage often resolves this without compromising historic fabric.
• Cracked lintels: Stone lintels over windows and doors may develop stress fractures. Replacement or reinforcement with discreet steel angles is sometimes necessary.

Roof Structure and Framing

Colonial-era roofs were typically framed with hand-hewn timbers joined by mortise-and-tenon connections secured with wooden pegs. Key assessment points include:

• Checking for sagging ridge lines, which indicate rafter spreading or ridge beam failure
• Inspecting rafter tails and wall plates for rot, particularly where they embed into stone walls
• Evaluating the condition of original wood shingles or slate and the underlying sheathing
• Assessing whether the original roof pitch and framing can support modern insulation and ventilation requirements

Moisture and Indoor Environmental Conditions

Historic stone buildings breathe differently than modern construction. The thick stone walls naturally regulate humidity, but introducing modern HVAC systems without careful planning can cause condensation within wall assemblies. A moisture audit should measure relative humidity at multiple points through the wall thickness and identify any areas of biological growth that indicate persistent dampness.

2. Preservation Philosophy and Design Approach

The guiding philosophy of any historic restoration should balance authenticity with livability. The restoration of the Abiah Taylor House demonstrates how architectural archaeology can inform every decision, from the rebuilding of original fireplaces to the recreation of period window configurations.

The Secretary of the Interior’s Standards

In the United States, the Secretary of the Interior’s Standards for Rehabilitation provide the framework for historic preservation work. Four key principles apply directly to residential restoration:

1. Preserve historic materials and features rather than replacing them wherever possible. Original wood floorboards, paneled doors, and hand-forged hardware should be repaired, not discarded.
2. Distinguish new work from old in a way that is reversible and does not damage historic fabric. Additions and modern interventions should be detectable upon close inspection without overpowering the original design.
3. Protect the character-defining features of the property, including massing, roof form, window patterns, and entrance details. These elements define the architectural style and period.
4. Avoid creating a false sense of history by conjecturally recreating features that may never have existed. Documented evidence should guide all restoration decisions.

Respecting the Original Floor Plan

The colonial stone farmhouse that won the 2015 award retained its original center-hall floor plan, a hallmark of Georgian and Federal-era design. Rather than opening up the entire first floor into a great room (as many modern renovations do), the restoration team preserved the sequence of rooms: a formal parlor to one side of the central stair hall, a dining room to the other, and a keeping room or kitchen at the rear. This layout respects both the historic circulation pattern and the structural integrity of the thick stone partition walls.

Modern functions such as a powder room, mudroom, and updated kitchen were tucked into a sensitively designed rear addition that steps down in scale from the original massing. This approach allows the historic core to remain intact while accommodating 21st-century living requirements.

3. Material Selection and Craft Techniques

Choosing appropriate materials and engaging skilled craftspeople is arguably the most critical aspect of a successful historic restoration. The wrong material choice can accelerate deterioration, while the right one extends the life of the building for another century.

Lime Mortar vs. Portland Cement

One of the most common and damaging mistakes in historic masonry work is the use of modern Portland cement mortar for repointing. The table below summarizes the critical differences:

For colonial stone farmhouses, Type N or Type O lime mortar (with a natural hydraulic lime component) is the appropriate specification. The mortar should always be softer and more permeable than the stone it bonds.

Period-Appropriate Windows and Doors

Original window sash from the 18th century is irreplaceable. Where windows must be restored rather than replaced, craftspeople can rebuild the sash using:

• Vertical-grain old-growth pine or mahogany for sill and frame components
• Cylinder glass (or reproduction cylinder glass) that replicates the subtle distortions and waviness of 18th-century glazing
• Cast-iron or brass sash weights for proper balance operation
• Storm windows with low-e coating mounted on the interior to protect the historic exterior profile

Entrance doors in colonial homes were typically six-panel designs with raised panels, hung on wrought-iron HL hinges. The award-winning farmhouse retained its original front door, with the restoration team carefully stripping 200 years of paint layers to reveal the original color a deep olive green that was confirmed through paint analysis.

Wood Flooring and Interior Trim

Understanding period moldings is essential when restoring interior woodwork. Colonial trim profiles are simpler than their Victorian successors, typically featuring:

• Wide baseboards (6 to 10 inches tall) with a single ogee or chamfered top edge
• Chair rails installed at window sill height, typically 30 to 34 inches above the floor
• Simple crown molding with one or two profile steps rather than the elaborate built-up assemblies of later periods
• Paneled window aprons and architraves that echo the door trim detailing

Original wide-plank flooring (12 to 20 inches wide) was salvaged wherever possible. Sections too damaged for floor use were reused in secondary locations such as attic storage or closet flooring. Where new flooring was needed, quarter-sawn white oak boards were milled to match the original dimensions and finished with boiled linseed oil and wax rather than modern polyurethane.

4. Integrating Modern Systems Without Compromising Historic Character

One of the greatest challenges in any historic restoration is the integration of modern mechanical, electrical, and plumbing systems while preserving the visual integrity of the original interiors. The 2015 award-winning project offers several instructive strategies.

HVAC and Insulation Strategies

Heating and cooling a 239-year-old stone structure requires a different approach than a modern framed house. The restoration team employed a combination of strategies:

• Hydronic radiant heating installed in the newly poured basement slab and within the rear addition’s floor assembly. This avoided the need for baseboard heaters or forced-air registers that would interrupt wall surfaces.
• Mini-split heat pumps discreetly mounted in the attic and rear addition, with supply runs hidden within a new service core behind the historic kitchen fireplace mass.
• Interior storm windows with low-e glass to improve thermal performance while preserving the historic single-glazed sash on the exterior elevation.
• Blown-in cellulose insulation in the attic floor (not the rafters) to maintain the visual volume of the original roof structure. In the walls, insulation was omitted entirely in the historic core to allow the stone mass to continue breathing.

Electrical and Plumbing Routing

Concealing modern wiring and plumbing in a stone-walled building requires creativity:

• Chases were created within the thickness of new interior partition walls that were added in the rear wing, not the historic core.
• Vertical runs were hidden in closets and behind cabinetry rather than chased into stone walls.
• Where wiring had to cross a stone wall, it was routed through existing openings (such as old chimney flues no longer in service) or through the floor and ceiling cavities.
• Bathroom and kitchen plumbing was concentrated in the addition, keeping the historic core free of the complex pipe networks that would be difficult to maintain behind stone.

Code Compliance and Accessibility

Designing a modern house within a historic district requires navigating local preservation ordinances that may limit exterior alterations. The project team worked with the local historic commission from the earliest design phase, securing approval for:

• A rear addition that is visually subordinate to the original massing, recessed 8 feet behind the main rear wall
• A new roof dormer on the rear slope only, preserving the street-facing elevations unchanged
• Reproduction period lighting fixtures for exterior wall-mounted lights
• Concealed gutter systems that do not alter the roof overhang profile

The result is a home that meets all modern building codes and provides 21st-century comfort while appearing, from the street, much as it did in the late 18th century. This preservation-first mindset is the defining characteristic of the Best Traditional Home 2015 restoration and a model for anyone undertaking a similar project.

Every colonial farmhouse restoration demands patience, skilled craftsmanship, and a deep respect for the original builders’ work. By following the principles outlined above from structural assessment through material selection and system integration homeowners and builders can ensure these historic homes survive for another 200 years.

For further reading on historic preservation techniques, see our guide on reproducing traditional moldings for a complete reference on classical wood trim profiles and installation methods.