Aja · Valle de Soba, · Cantabria · 43°13'N 3°31'W · ~610m Elevation Direct Contact: +34 624 34 51 62

Restoration & Heritage

A family endeavor spanning over a decade, pairing authentic Cantabrian stone masonry and timber framing with contemporary thermal insulation and finishes.

A Decade of Craftsmanship

The restoration of this traditional stone house has been a family endeavor spanning over a decade, led by Alfredo, a builder with decades of expertise in traditional house restoration.

While officially recorded in the registry as dating to 1900, local memory and the vernacular stonework suggest the house is considerably older—with 1900 simply marking the era of its formal registration.

Restoring a historic building requires far more care and insight than building new: every original quirk and feature must be respected while integrating modern thermal performance. The house seamlessly pairs authentic masonry and timber framing with updated plumbing, brand-new electrical wiring, and high-performance low-emissivity double-glazed windows throughout.

Alfredo restoring vernacular stone and timber in Casa de Aja
Alfredo, master craftsman with decades of expertise in traditional house restoration.
02 · Building Science & Materials

The Roof & Thermal Envelope

The first major milestone was the total reconstruction of the roof. Visible from the interior are 2 cm solid timber ceiling boards, topped with a 4 cm layer of 100% natural, carbon-negative expanded cork insulation. This sustainable material delivers exceptional thermal and acoustic efficiency while allowing the roof structure to breathe naturally. The system is protected by a heavy-duty Onduline waterproofing membrane and finished with classic roof tiles—utilizing new structural tiles underneath and carefully recovered antique tiles on top to preserve the building’s authentic historical silhouette.

All exterior stone walls were painstakingly cleaned and lime/cement-rendered, accompanied by comprehensive interior thermal insulation to ensure year-round warmth.

Roof timber structure renovation Roof Structure

Timber Structure Preservation

Solid wood ceiling boards and structural rafter consolidation.

New roof insulation layering with natural cork Cork Insulation

Natural Cork & Onduline Layering

Carbon-negative cork insulation allowing the timber structure to breathe.

Cleaning exterior masonry for lime rendering Stone Masonry

Exterior Masonry Conservation

Manual cleaning and pointing of ashlar and rubble stone perimeter walls.

Chronological Craftsmanship

Progression Sequence: The Traditional Viewing Deck

A custom-built wooden viewing deck was installed, insulated with natural cork and framed to capture the sweeping views across the valley.

Restoring the viewing deck stage A 1 · Old Structure

Old Structure

Removing the aged viewing deck

Restoring the viewing deck stage B 2 · Ready for Restoration

Ready for Restoration

The old deck has been cleared

Restoring the viewing deck stage C 3 · Preparing Stonework

Preparing the Stonework

The gaps have been cleaned and are ready to be cement-rendered

Restoring the viewing deck exterior stage D 4 · New Wooden Frame

New Wooden Frame

The custom-made wooden panels and window frames are in.

Adding cork insulation to viewing deck 5 · Cork Insulation

Cork Thermal Barrier

High-efficiency sustainable cork insulation installed across the floor deck.

Viewing deck finished interior 6 · Finished View

Finished Mirador

A luminous architectural sanctuary welcoming the valley light all year round.

03 · Contemporary Living

Interiors & Finishes

The interior was comprehensively rebuilt from the foundations up: structural walls, floors, kitchens, and bathrooms are all brand new.

Solid oak floorboards feature throughout the upper floor, upper living room, and main living areas. On the ground floor entrance, high-resistance oak-style laminate was selected specifically for high-wear areas near the garden access, transitioning into solid oak in the interior rooms.

The newly completed top floor represents the culmination of the project. It features open living spaces, solid oak floors, contemporary porcelain-tiled kitchens and bathrooms, and three distinct en-suite bathrooms styled in subtle pastel accents (terracotta, sage, and sky blue).

Interior Rebuild Progression Living Hall
Indoors before renovating Before
Indoors after renovating After

Preserved masonry features harmonized with insulated partition walls and solid oak flooring.

Adding thermal insulation to interior walls Thermal Insulation

Thermal Insulation Envelope

Ensuring snug winter thermal retention and summer temperature regulation.

Preparing inner walls Drylining & Electrics

Updating the Inside

Clearing the old walls to add the insulation and new walls

New solid oak flooring installation New Floor Structure

Installing the new Floor

Reinforced concrete supports the entire floor of the upstairs

Restoring the top floor residence Upper Residence

Upstairs Renovation

The concrete floor is ready but no walls have yet been built

Level 00 Studio

Lower Ground Floor & Workshop Progression

Lower ground floor before Initial State

Historical Basement

Ancient dry-stone bedrock foundations.

Restoring the lower ground floor Structural Works

Masonry Stabilization

Consolidating stone lintels and floor slabs.

Lower ground floor after restoration Restored Studio

Versatile Studio Space

Direct level access to the garden and courtyard.

04 · Established Landscape

The Garden & Grounds (500 m²)

The 500 m² garden has been meticulously sculpted into an established outdoor sanctuary:

  • Productive Grounds: Three neatly bordered vegetable garden plots surrounded by manicured grass pathways, featuring stone edging designed for seamless lawn mowing right to the boundary.
  • Orchard & Flora: Established fruit and nut trees including two hazelnuts, two walnuts, a pear tree, an apple tree, and a cherry tree, complemented by a tranquil Zen rockery.
  • Outdoor Living: A shaded terrace pergola draped in natural grapevines, equipped with a stone garden sink, a decorative water feature, multiple outdoor water taps, and an exterior electrical point.
  • Potting & Storage: A mini greenhouse, seedling nursery area, and tool storage shed.
Completed garden pergola terrace with vine covering
Building the garden deck, greenhouse and seedling areas. The wooden structure has just been put in place
Landscape Sculpting

Garden Contouring & Hand-Cut Stone Edging

Garden original terrain

Previous State

The current garden was just an empty plot of land

Terracing and ground levelling in garden

Early Days

The vegetable garden before adding the stone outlines

Restoring garden wall and edging

Precision Stone Edging

Hand-laid perimeter stonework facilitating lawnmower trimming.

Archival Transformations

Before & After Transformations

Direct before-and-after pairs documenting the careful transformation of the upper floor spaces from raw attic volume into refined contemporary rooms.

Upper Bedroom Suite First Floor Suite
Upper bedroom before restoration Before
Upper bedroom after restoration After

Transformation of the upper bedroom suites with solid oak floorboards and thermal envelope.

Blue En-Suite Bathroom En-Suite Bathroom
Blue bathroom before Before
Blue bathroom after After

Reconstruction complete with porcelain tiling and contemporary sanitary fixtures.

Upper Level Kitchen Kitchen-Dining Suite
Kitchen wall preparation Before
Kitchen after completion After

From raw structural volume to a sunlit kitchen and dining space beneath preserved oak timbers.

Upper Sitting Room & Gallery Upper Living Area
Sitting room before Before
Sitting room after After

Opening the upper sitting area to natural mountain light and double-glazed joinery.

Upper Loft Living Space High Ceiling Lounge
Loft space before Before
Loft space after After

Restoration of soaring volumes with exposed oak trusses and solid hardwood floors.