Façade Saver

Listed villa in southern Germany – “Only the best material for blow-in insulation”

A demanding insulation project with maximum precision and respect for historic building fabric.

The energy-efficient refurbishment of historic buildings is one of the most complex tasks in the construction sector. Especially when the exterior appearance must be fully preserved, innovative, non-invasive, and highly efficient insulation methods are required. In this project, a villa from the early 20th century in southern Germany was energetically modernized—without altering the listed façade. The solution: a premium blow-in insulation material with outstanding thermal performance, perfectly suited for extremely narrow cavities and the highest demands in quality and settlement stability.

Blow-in insulation as the ideal solution for listed façades

Buildings from this era often feature cavity wall constructions with very narrow gaps. This was also the case here: the cavity measured only around 3 cm in the lower sections and tapered towards the top to nearly 1 cm.

This made the building one of the most challenging cases, where conventional insulation methods reach their limits. Despite these difficult conditions, complete filling of the cavity was ensured. The insulation material was injected from the inside to comply with heritage protection requirements and to preserve the historic façade.

Insulation precisely applied—without intervention in the exterior envelope

A total of 5 m³ of insulation material was injected into the narrow cavities of the wall structure. Each injection process was carefully planned to ensure even the tightest areas were reached.

This clearly demonstrated how crucial the choice of the right blow-in insulation material is:

Only fine-grained, flow-stable, and highly compactable materials can reliably fill such narrow structures—without gaps and without subsequent settling. Using modern machinery and experienced specialists, a homogeneous insulation layer was created across the entire wall height. Even areas with gaps of just over 10 millimeters were significantly improved in thermal performance.

Why Insute 25-pro was the best choice for this project

For extremely narrow cavities, many insulation materials reach technical limits. For this project, a material was required that combines the following properties:

ultra-fine material structure, suitable for cavities from 1 cm
high settlement stability for long-term performance
very low thermal conductivity for maximum energy efficiency
diffusion-open properties for moisture regulation
gentle processing, ideal for listed buildings

This combination makes it possible to fully and permanently insulate even the narrowest wall cavities—without altering the external architecture or requiring major structural modifications.

Energy efficiency and heritage protection in harmony

Today, the villa benefits from significantly improved thermal insulation. Heat loss through the façade has been noticeably reduced—an important contribution to lowering operating costs and improving overall energy efficiency.

At the same time, the historic appearance has been completely preserved—a key aspect for owners, heritage authorities, and regional building culture. This project demonstrates how thoughtful planning, high-quality materials, and precise execution can work together to optimize historic architecture from an energy perspective.

Our blow-in insulation material delivers exactly this added value: efficient, sustainable refurbishment with top thermal performance andwithout visible intervention.

Are you planning a similar project?

Whether it’s an older building, a historic structure, or an existing building with high energy efficiency requirements—we can assist you with the analysis, planning, and installation of modern blown-in insulation.