Breathing New Life into an 18th Century Pennsylvania Farmhouse: A Masterclass in Colonial Restoration and Modern Design

Restoring an 18th century farmhouse while equipping it for modern living is one of the most rewarding challenges in residential architecture. When Period Architecture Ltd., led by partner Jeffrey Dolan, took on a modest Pennsylvania farmhouse built more than 200 years ago, the goal was clear: faithfully preserve the original spirit of the structure while seamlessly integrating contemporary amenities. The result earned the HOUSES Award for Best Traditional Home of 2015, and stands as an instructive case study for anyone considering a historic home restoration. This article explores the key strategies behind this successful farmhouse renovation, from structural interventions to material selection and energy upgrades.

Assessing the Existing Structure: What 200 Years of History Teaches Us

Before any design work begins, a thorough assessment of the existing structure is essential. Eighteenth-century farmhouses were built with materials and techniques that differ significantly from modern construction standards, and understanding these differences informs every subsequent decision.

Understanding Historic Framing Systems

Early American farmhouses typically used heavy timber framing with hand-hewn beams joined by mortise-and-tenon connections. Unlike modern dimensional lumber, these timbers were often oversized and remarkably durable. In the Pennsylvania farmhouse restoration, the existing frame was evaluated for:

• Structural integrity of the original timber frame, including signs of rot, insect damage, or water infiltration
• Settlement patterns visible in floor slopes, door misalignments, and cracked plaster
• Condition of the stone foundation, which in 18th century farmhouses was typically fieldstone laid in a lime mortar
• Roof framing adequacy for modern snow loads and potential solar panel installation

Identifying Historic Fabric Worth Preserving

Not every element of an old house needs to be saved, but a responsible restoration identifies the features that define the structure’s character. During the assessment phase, the team catalogued:

• Original wide-plank flooring and its salvageable portions
• Hand-forged hardware including hinges, latches, and door pulls
• Existing fireplace surrounds, mantels, and chimney massing
• Original window sash and trim profiles that establish the period aesthetic

This inventory process is critical because it establishes which elements must be restored in kind versus those that can be replaced with sympathetic modern equivalents. As noted in best practices for historic building preservation, the goal is to retain as much original material as possible while introducing modern systems invisibly.

Documenting Existing Conditions

A rigorous documentation process captured every aspect of the existing farmhouse before work began:

1. Measured drawings of all floor plans, elevations, and sections to create an accurate as-built record
2. Photographic documentation including close-ups of joinery, moldings, and hardware
3. Materials analysis to identify paint colors, wood species, and mortar compositions for accurate matching
4. Thermal imaging to locate air leaks, missing insulation, and moisture issues within wall assemblies

Designing the Colonial Intervention: Blending Old and New

The central challenge of any historic restoration is designing additions and modifications that respect the original architecture while meeting contemporary needs. Jeffrey Dolan and his team approached this balance through careful massing, proportional studies, and material continuity.

Additions That Read as Ancillary

A common mistake in historic home renovations is designing additions that compete with or overwhelm the original structure. The Period Architecture team ensured that all new work remained subordinate to the original farmhouse through several strategies:

• Stepping additions back from the main facade so the original massing remains dominant
• Matching roof pitches and eave depths to maintain visual continuity
• Using simplified versions of the original trim profiles, avoiding direct copies that might create confusion between old and new
• Limiting new fenestration to the sides and rear of the house when possible

Proportion and Scale as Design Tools

Eighteenth-century architecture is governed by proportional relationships that differ from modern standards. Room heights were lower, windows were smaller, and door openings were narrower. The restoration respected these proportions while making subtle adjustments for comfort:

• Ceiling heights were raised only in new additions, preserving the intimate scale of original rooms
• Window openings were enlarged conservatively, with new sash matching the traditional 12-over-12 or 9-over-6 pane configurations
• Door openings were widened only where necessary for accessibility, with transoms added to maintain vertical proportion

Circulation and Spatial Flow

The original farmhouse layout featured small, compartmentalized rooms connected by narrow doorways, a design born of the need to conserve heat in winter. The restoration reimagined circulation by opening select load-bearing walls with concealed steel lintels and creating a sightline through the house from front to back. This approach allowed the project to achieve the open, airy feel modern homeowners expect without sacrificing the historic character of the primary rooms.

Material Selection and Craftsmanship in Historic Restoration

The materials used in a historic restoration must balance three competing priorities: historical accuracy, long-term durability, and performance standards. The colonial restoration of this Pennsylvania farmhouse demonstrates how skilled material selection can satisfy all three.

Sourcing Compatible Materials

One of the most critical lessons in historic restoration is that modern materials can damage historic buildings. For example, Portland cement mortar is harder and less permeable than the lime mortar originally used in the farmhouse foundation. Using it would trap moisture within the stone walls, leading to spalling and deterioration. The project team adhered to the principle of material compatibility throughout:

• Mortar: Lime-based mortar was used for all stone repointing to maintain vapor permeability and accommodate minor structural movement
• Wood: Salvaged old-growth lumber was sourced for replacement framing and trim where possible, matching the density and grain of the original material
• Paint: Period-appropriate milk paints and low-VOC acrylics were used, with colors matched to original paint analysis
• Roofing: Standing-seam metal roofing was chosen for the new addition, while the original roof was re-covered with slate to match the historic appearance

Craftsmanship Techniques

The quality of any historic restoration ultimately depends on the skill of the craftspeople involved. The Period Architecture team worked with specialists who understood traditional building methods:

• Timber framers who could replicate mortise-and-tenon joinery for repair sections
• Plasterers trained in three-coat lime plaster application for wall and ceiling repairs
• Cabinetmakers who could reproduce period-correct raised-panel doors and built-in cabinetry
• Stone masons experienced in dry-stack and lime-mortar techniques for foundation and chimney work

Energy Upgrades Without Visual Compromise

Modern energy performance is non-negotiable, but it must be achieved without altering the building’s appearance. The project employed several strategies to improve thermal performance invisibly:

1. Closed-cell spray foam insulation was installed behind original plaster walls by injecting it through small access holes, preserving the historic surface
2. Weatherstripping was integrated into existing window jambs using bronze spring strips, which are nearly invisible when the window is closed
3. A high-efficiency boiler with radiant floor heating was installed in the new addition, with the existing rooms heated through carefully concealed baseboard radiators
4. Low-E storm windows were added to the exterior of original windows rather than replacing the historic sashes, preserving the original appearance while improving thermal performance

These energy upgrades parallel the strategies used in other historic renovations, demonstrating that balancing heritage with modern conveniences is achievable through careful planning and appropriate technology selection.

Lessons from the Colonial Resurrection: A Framework for Future Restorations

The HOUSES Award-winning restoration of this Pennsylvania farmhouse offers a replicable framework for anyone undertaking a historic home project. The success of the project rested on four foundational principles that apply to buildings of any period.

Principle 1: Respect the Original Intent

Every historic building tells a story about how people lived, worked, and sheltered themselves. The best restorations honor that story while adapting it for contemporary use. This means understanding why original decisions were made: why the kitchen wing was placed where it was, why windows were sized a certain way, and why room proportions followed specific rules. Deviations from the original design should be intentional and well-justified.

Principle 2: Make Additions Read as Contemporary

One of the most debated questions in historic preservation is whether additions should mimic the original architecture or declare themselves as modern interventions. The colonial farmhouse project took a nuanced position: new work was detailed with simplified versions of historic forms, using the same material palette but with cleaner lines. This approach creates a dialogue between old and new rather than a confusing imitation.

Principle 3: Invest in the Building Envelope

The building envelope is where historic preservation and energy performance intersect most critically. Rather than ripping out historic fabric to install insulation, the project invested in targeted improvements:

• Air sealing at the attic floor and basement ceiling to reduce stack-effect heat loss
• Insulating the new addition to current code standards while treating the historic portion as a separate thermal zone
• Adding continuous exterior insulation under new roofing and siding sections where the envelope was opened
• Upgrading the foundation perimeter with rigid insulation and vapor barriers tied into the drainage plane

Principle 4: Plan for Long-Term Maintenance

Historic buildings require ongoing maintenance that differs from conventional homes. The project team specified materials and systems that future owners could maintain without specialized knowledge:

• Natural materials that can be spot-repaired rather than replaced entirely
• Access panels at key mechanical connections hidden within closets and millwork
• A maintenance manual documenting the restoration work, paint colors, mortar mixes, and sources for replacement materials

Diagnostic Checklist for Colonial Farmhouse Restorations

For homeowners and contractors considering a similar project, the following checklist provides a structured starting point:

1. Research phase: Research the building’s history through deed records, historic maps, and local historical societies. Identify original floor plans and any previous alterations.
2. Structural assessment: Engage a structural engineer experienced with timber-frame buildings to evaluate the foundation, frame, and roof.
3. Moisture analysis: Assess groundwater conditions, gutter and downspout performance, and existing damp-proofing measures before designing interventions.
4. Zoning and code review: Consult local historic preservation ordinances and building code requirements early, as many jurisdictions have specific rules for historic structures.
5. Phasing strategy: Plan the restoration in phases that allow the family to continue using portions of the house throughout construction.

The growing interest in historic home restoration reflects a broader appreciation for architectural design trends that prioritize character, craftsmanship, and sustainability over disposable construction. The Pennsylvania farmhouse that earned the 2015 Best Traditional Home award proves that with the right team and the right philosophy, an 18th century farmhouse can become a model for 21st century living without losing the soul that made it special in the first place.