Casa de Sá, Ponte de Lima

An intervention focused on heritage preservation and attention to detail. Casa de Sá, a historic manor in Ponte de Lima with great architectural and cultural value, faced severe rising damp issues that threatened its library and original structural elements. Prudêncio’s team was called to implement a solution that would respect and protect the building’s legacy.

Challenges and Requirements

Identify and treat rising damp by capillarity affecting the library walls, without removing the solid wood bookcases filled with books.

Carry out the intervention in a heritage building – with stone walls up to 90 cm thick – ensuring compatibility with the existing structure and preservation of its original elements.

Deliver a solution that was durable, effective, and discreet, maintaining the identity of the space while eliminating the effects of dampness.

Adopted Solution

Installation of approximately 250 conductor rods, reaching up to 85 cm deep into the stone walls, allowing the application of KÖSTER Crisin 76 Concentrate directly into the active capillaries affected by rising damp.

Execution of the injection process from the exterior of the library walls, since removing the interior bookcases was not possible – a technical approach that respected both the architectural and functional value of the space.

Results and Benefits

Just one week after the intervention, humidity levels in the barrier zone dropped from 99% to 13–16%, outperforming the typical expected values (≈ 18%) after full system curing.

Complete elimination of rising damp, preventing mold, efflorescence, coating detachment, and degradation — preserving both the library and the historic structure.

The building’s heritage was safeguarded and enhanced, ensuring that it continues to serve its cultural and social purpose with safety and quality.