References ⁄ Roof restoration with PAVATEX system solutions (CH)
Château d‘Allaman: residences created to new-build standard

The listed Château d‘Allaman near Lausanne is one of the oldest castles on Lake Geneva. It is currently being restored and converted into luxury residences. A high-performance PAVATEX system solution, comprising flexible PAVAFLEX wood fibre insulating material, an LDB 0.02 airtight layer and ISOLAIR/ISOROOF rigid underlays, was implemented in order to satisfy stringent physical and ecological demands. With its permeable structure, the system not only provides perfect protection for the ancient roof timbering, which dates back to the 17th century, but also makes for a comfortable and pleasant living environment in the former knights‘ castle.

Château d‘Allaman is situated high above Lake Geneva, not far from Lausanne. Situated on the edge of the wine-growing village of Allaman on the Route du Lac, it is one of the oldest castle estates in the region. Now a listed building, the château dates back to around 1253 when it was inhabited by knights. Despite undergoing numerous makeovers in various styles over the centuries, it still creates a majestic and harmonious impression. Today, almost three hundred years after the last major restructuring work was carried out, a new era is dawning for the ancient castle in the form of a restoration and conversion project to create luxury residences.

New living space in the château‘s loft area

A key component of the new utilisation plan is the creation of living space in the hitherto unused loft areas of the château, a step which called for a modern and multifunctional roof insulation concept. The requirements were as follows: the ancient roof timbering was to be protected and preserved without fundamental modifications to the building‘s physical structure. In addition, the insulation had to offer outstanding protection against heat, cold and noise, and make for a comfortable and pleasant indoor living environment. At the same time, in line with the overarching ecological concept, the products used had to be as sustainable as possible.

Optimum protection of the ancient roof timbering

In order to satisfy the considerable physical and ecological demands placed on the build, the client and the architect opted to use sustainable wood fibre insulating materials from PAVATEX. “PAVATEX wood fibre insulating materials were the perfect choice for renovating and converting the château. They are completely natural products, and thus provide the ideal basis for restoring the historic building in a sustainable and ecological manner,” explains architect Nicolas Delachaux of Atelier d‘architectes glatz & delachaux SA. “They meet all current standards in terms of thermal insulation, heat protection, and air- and water tightness, while their permeable structure offers optimum protection for the ancient roof timbering.” With their outstanding capillary action, the PAVATEX products ensure that moisture passes through the insulating material, giving the building a breathable envelope. Future residents also stand to benefit because the natural permeability of PAVATEX gives rise to a noticeably pleasant, balanced living environment that virtually regulates itself. During periods of high humidity, the wood fibre actually absorbs water vapour, releasing it again when humidity levels fall.

High-performance PAVATEX system solution

The roof of Château d‘Allaman was renovated from the outside, a process which involved replacing the old uninsulated brick construction above the rafters with a high-performance PAVATEX system solution. This comprises the flexible PAVAFLEX wood fibre insulating material, the LDB 0.02 airtight layer and ISOLAIR/ISOROOF rigid underlays. First, the areas between the rafters were packed with 140 mm PAVAFLEX. The flexible wood fibre insulation material was incorporated quickly, effortlessly and seamlessly into the existing construction. The PAVATEX LDB 0.02 airtight layer was then laid on top of the rafters. This extremely permeable membrane is particularly suitable for the restoration of roofs. It is both rainproof and windproof, providing wood and insulation material alike with permanent protection and also helping to save a considerable amount of time and money because it is simply laid over the entire rafter area. 52 mm ISOLAIR/ISOROOF rigid underlays completed the renovation solution. With their porous board structure and high weight-per-unit-area factor, they enhance acoustic insulation while providing excellent protection against the heat of the summer months.

Loft living space to new-build standard

“The combination of PAVAFLEX insulating material, the LDB 0.02 airtight layer and ISOLAIR/ISOROOF rigid underlays makes for a physically flawless roof construction over a total area of around 1,000 m2,” explains Frédéric Burkhalter, system consultant at PAVATEX SA. “And with a U-value of around 0.2 W/m2K, this system also satisfies the most stringent demands in terms of energy efficiency. This part of the building now complies with the current low-energy standards applicable to new buildings.” This is where the quality of PAVATEX wood fibre board systems – proven in projects too numerous to mention – comes into its own. The company is a single-source provider of a full range of integrated system components. Reliable and proven in design, they add security to the system and provide both new and restored buildings with a modern, multifunctional envelope. As well as offering the house and its residents permanent protection against the elements, they also add value to the property in the long term. Moreover, by minimising heating and energy costs, PAVATEX wood fibre insulation systems make a valuable contribution to environmental protection.

Simple and efficient to work

PAVATEX products are not only highly effective in situ, but are also efficient in terms of workability. “PAVATEX wood fibre insulation boards are natural wood products that people in the carpentry trade can work in a simple and straightforward manner,” says Peter Stuber of G. Blanchard Charpente SA, the building coordinator for the project. “They are easy to cut to size using conventional tools and don‘t produce any irritating particles or other pollutants.” This is because PAVATEX manufactures its quality wood fibre insulation boards using a modern wet process. “The wet method involves defibrating slabs and wood chips using a thermo­mechanical process and then adding water,” explains François Bourquin, plant manager at PAVATEX Fribourg. “The pulp is then pressed and dried to produce high-performance wood fibre insulation boards. They are vapour-permeable, moisture-regulating, and offer optimum protection against cold, heat, noise and fire hazards.” Château d‘Allaman now boasts a new, highly efficient roof, thanks to the perfect combination of PAVAFLEX insulating materials, the LDB 0.02 airtight layer and ISOLAIR/ISOROOF rigid underlays. These not only offer a pleasant, regulated indoor living environment, but also provide the optimum physical conditions for the long-term preservation of the ancient roof timbering, thus ensuring that the château will be around for many years to come.

Château d‘Allaman: residences created to new-build standard

The listed Château d‘Allaman near Lausanne is one of the oldest castles on Lake Geneva. It is currently being restored and converted into luxury residences. A high-performance PAVATEX system solution, comprising flexible PAVAFLEX wood fibre insulating material, an LDB 0.02 airtight layer and ISOLAIR/ISOROOF rigid underlays, was implemented in order to satisfy stringent physical and ecological demands. With its permeable structure, the system not only provides perfect protection for the ancient roof timbering, which dates back to the 17th century, but also makes for a comfortable and pleasant living environment in the former knights‘ castle.

Château d‘Allaman is situated high above Lake Geneva, not far from Lausanne. Situated on the edge of the wine-growing village of Allaman on the Route du Lac, it is one of the oldest castle estates in the region. Now a listed building, the château dates back to around 1253 when it was inhabited by knights. Despite undergoing numerous makeovers in various styles over the centuries, it still creates a majestic and harmonious impression. Today, almost three hundred years after the last major restructuring work was carried out, a new era is dawning for the ancient castle in the form of a restoration and conversion project to create luxury residences.

New living space in the château‘s loft area

A key component of the new utilisation plan is the creation of living space in the hitherto unused loft areas of the château, a step which called for a modern and multifunctional roof insulation concept. The requirements were as follows: the ancient roof timbering was to be protected and preserved without fundamental modifications to the building‘s physical structure. In addition, the insulation had to offer outstanding protection against heat, cold and noise, and make for a comfortable and pleasant indoor living environment. At the same time, in line with the overarching ecological concept, the products used had to be as sustainable as possible.

Optimum protection of the ancient roof timbering

In order to satisfy the considerable physical and ecological demands placed on the build, the client and the architect opted to use sustainable wood fibre insulating materials from PAVATEX. “PAVATEX wood fibre insulating materials were the perfect choice for renovating and converting the château. They are completely natural products, and thus provide the ideal basis for restoring the historic building in a sustainable and ecological manner,” explains architect Nicolas Delachaux of Atelier d‘architectes glatz & delachaux SA. “They meet all current standards in terms of thermal insulation, heat protection, and air- and water tightness, while their permeable structure offers optimum protection for the ancient roof timbering.” With their outstanding capillary action, the PAVATEX products ensure that moisture passes through the insulating material, giving the building a breathable envelope. Future residents also stand to benefit because the natural permeability of PAVATEX gives rise to a noticeably pleasant, balanced living environment that virtually regulates itself. During periods of high humidity, the wood fibre actually absorbs water vapour, releasing it again when humidity levels fall.

High-performance PAVATEX system solution

The roof of Château d‘Allaman was renovated from the outside, a process which involved replacing the old uninsulated brick construction above the rafters with a high-performance PAVATEX system solution. This comprises the flexible PAVAFLEX wood fibre insulating material, the LDB 0.02 airtight layer and ISOLAIR/ISOROOF rigid underlays. First, the areas between the rafters were packed with 140 mm PAVAFLEX. The flexible wood fibre insulation material was incorporated quickly, effortlessly and seamlessly into the existing construction. The PAVATEX LDB 0.02 airtight layer was then laid on top of the rafters. This extremely permeable membrane is particularly suitable for the restoration of roofs. It is both rainproof and windproof, providing wood and insulation material alike with permanent protection and also helping to save a considerable amount of time and money because it is simply laid over the entire rafter area. 52 mm ISOLAIR/ISOROOF rigid underlays completed the renovation solution. With their porous board structure and high weight-per-unit-area factor, they enhance acoustic insulation while providing excellent protection against the heat of the summer months.

Loft living space to new-build standard

“The combination of PAVAFLEX insulating material, the LDB 0.02 airtight layer and ISOLAIR/ISOROOF rigid underlays makes for a physically flawless roof construction over a total area of around 1,000 m2,” explains Frédéric Burkhalter, system consultant at PAVATEX SA. “And with a U-value of around 0.2 W/m2K, this system also satisfies the most stringent demands in terms of energy efficiency. This part of the building now complies with the current low-energy standards applicable to new buildings.” This is where the quality of PAVATEX wood fibre board systems – proven in projects too numerous to mention – comes into its own. The company is a single-source provider of a full range of integrated system components. Reliable and proven in design, they add security to the system and provide both new and restored buildings with a modern, multifunctional envelope. As well as offering the house and its residents permanent protection against the elements, they also add value to the property in the long term. Moreover, by minimising heating and energy costs, PAVATEX wood fibre insulation systems make a valuable contribution to environmental protection.

Simple and efficient to work

PAVATEX products are not only highly effective in situ, but are also efficient in terms of workability. “PAVATEX wood fibre insulation boards are natural wood products that people in the carpentry trade can work in a simple and straightforward manner,” says Peter Stuber of G. Blanchard Charpente SA, the building coordinator for the project. “They are easy to cut to size using conventional tools and don‘t produce any irritating particles or other pollutants.” This is because PAVATEX manufactures its quality wood fibre insulation boards using a modern wet process. “The wet method involves defibrating slabs and wood chips using a thermo­mechanical process and then adding water,” explains François Bourquin, plant manager at PAVATEX Fribourg. “The pulp is then pressed and dried to produce high-performance wood fibre insulation boards. They are vapour-permeable, moisture-regulating, and offer optimum protection against cold, heat, noise and fire hazards.” Château d‘Allaman now boasts a new, highly efficient roof, thanks to the perfect combination of PAVAFLEX insulating materials, the LDB 0.02 airtight layer and ISOLAIR/ISOROOF rigid underlays. These not only offer a pleasant, regulated indoor living environment, but also provide the optimum physical conditions for the long-term preservation of the ancient roof timbering, thus ensuring that the château will be around for many years to come.