References ⁄ Insulation with PAVATEX system solutions (D)
Period building renovated to the latest energy standards

In a project to renovate an over 500-year-old building in Landshut, internal thermal insulation of the listed facade and acoustic insulation of the intermediate ceilings were among the main challenges to be faced. The solution came in the form of PAVATEX wood fibre insulating boards which blend in perfectly with the historical fabric of the building and thus satisfy all the physical requirements to the letter. As a result, the newly renovated building now meets the stringent KfW 60 energy standard applicable to new builds in Germany.

Landshut is among the few German towns whose original medieval centre is still largely intact. One of its most splendid thoroughfares is "Neustadt", the main road which runs through the centre of the town and is lined with many medieval commercial and residential properties still in their original condition. Number 527 is a particular jewel: a three-storey commercial and residential building dating back to 1496 which, with its neo-Gothic facade, is one of the road’s most striking properties.

Preservation order a challenge

Rudi Napholtz, who owns an interior design and furnishings store in Landshut, also fell for the charm of this medieval property. After purchasing it in 2007, he decided to have it renovated as authentically as possible. "I recognised the potential of the structure despite its desolate condition," explains the client, who had already renovated several similar properties. The building is structured in two parts: the 100 m² old section with its street-facing facade, and a 65 m² annex to the rear. Whereas the latter was at risk of collapse and so had to be completely demolished and replaced, the main building which carries a preservation order was to be renovated from top to bottom. This was no simple task because here, too, the building’s structure posed the greatest problems. The reason for this was inappropriate renovation work carried out in the 19th century, in the course of which, for example, what had formerly been a continuous chimney had been truncated at ground-floor level with the remains – since removed – supported merely by a single, heavily overloaded beam. And in the roof area, the feet of the roof truss were rotten due to a leak in the roofing material and had to be reconstructed. Today, the house’s stability is underpinned by 7 tonnes of steel girder set into the building to provide additional reinforcement throughout.

Successful renovation using sustainable natural products

Once the structural problems had been resolved, client Rudi Napholtz went ahead with the actual renovation. He had to comply with local requirements for listed buildings which stipulated, for example, that the facade must not be changed and thus that the exterior walls should be insulated on the inside. The ancient timber framework around the intermediate ceilings and the roof truss, to name just two examples, also had to be preserved. At the same time, the building had to meet the KfW 60 energy standard (eligible for subsidy) that is applicable to new builds in Germany today. "The aim of a renovation project is to maintain the charm of the original building while reaping all the benefits of a new build," says Rudi Napholtz. "Wherever possible we wanted to use eco-friendly, sustainable natural products which would blend in perfectly with the historical fabric of the building." In addition to meeting requirements in terms of thermal insulation, the key renovation objectives included excellent acoustic insulation around the wooden intermediate ceilings and effective protection against overheating in the summer months.

Cost-effectiveness of PAVATEX system solutions confirmed

PAVATEX offers a range of high-performance system solutions featuring multifunctional and eco-friendly wood fibre insulating materials which cater specifically to requirements of this nature. Thanks to their outstanding biological and physical characteristics, these have proved their worth in numerous projects over the years – especially when it comes to renovating old buildings like the one in Landshut. "Before the project, I read up on the many different types of insulating material and ultimately opted for PAVATEX," explains Rudi Napholtz. "The wood fibre boards not only offer optimum insulation values, they are also extremely cost-effective to work. As eco-friendly wood products, they also blend in perfectly with the existing fabric of the building."

PAVATEX handles any insulation-related task

In this renovation project, internal insulation of the listed facade and the necessary acoustic insulation of the area around the intermediate ceilings were among the main challenges to be faced. "The PAVATEX systems provided optimum solutions to all the technical requirements," says Lothar Zieglmeier who, as head of regional sales at PAVATEX, co-supervised the renovation project from the outset. "PAVATEX wood fibre insulating boards not only provide highly efficient thermal insulation, effective acoustic insulation and protection against overheating in the summer months, but also balance out the dimensional tolerances that are always present in any old building." Moreover, thanks to their natural permeability, PAVATEX wood fibre insulating boards can absorb condensation and release it again as water vapour which not only guarantees a pleasant, regulated living environment but also guards against moisture-related damage.

PAVATEX insulating solutions for roofs, walls and floors

80 mm PAVADENTRO boards were used for the internal insulation of the facade. Specially developed for the internal insulation of exterior walls, these wood fibre insulating boards were used to cover an area of some 55 m² to produce an average U-value of 0.35 W/(m²K). For the roof area, 35 mm ISOLAIR L sarking boards spanning an area of around 250 m² provide effective protection against overheating in the summer months while also enhancing the building’s thermal and acoustic insulation. 40 mm PAVATHERM-PROFIL boards with integrated coupling battens were used for the integrated ceilings. This innovative, floor-levelling system covering a total area of 300 m² provides a floor structure with ideal acoustic and thermal insulation values, enabling what is virtually a floating wooden-panel floor to be laid without sleepers, which always tend to transmit irritating impact noise from footfall.

Dual climate protection with PAVATEX

By choosing eco-friendly, sustainable wood fibre insulating boards from PAVATEX, client Rudi Napholtz has not only ensured that this historical building meets all the requirements of the German KfW 60 energy standard, but has also made a valuable and measurable contribution to protecting the climate. This is fully in keeping with PAVATEX’s own climate protection campaign, "Become a CO2 Champion", which calls on clients to actively reduce CO2 emissions by using wood fibre boards from PAVATEX to insulate their buildings, and rewards top climate enhancers with attractive prizes. The PAVATEX wood fibre insulating boards used in this project offset around 15,000 kg of CO2 from the global CO2 balance. That is the amount of CO2 that the wood permanently removed from the atmosphere and, thus, from the global climate cycle, while it was growing. There is also, of course, the insulating effect of the PAVATEX products themselves, which permanently reduce the building’s CO2 emissions and help cut heating costs. So PAVATEX wood fibre insulating materials not only help protect the climate, but help ease the strain on your pocket, too. With their unique physical properties, they ensure that even historical buildings like the one featured in this report can be given a modern and multifunctional envelope so that they are preserved for future generations for many decades, or even centuries, to come.

Period building renovated to the latest energy standards

In a project to renovate an over 500-year-old building in Landshut, internal thermal insulation of the listed facade and acoustic insulation of the intermediate ceilings were among the main challenges to be faced. The solution came in the form of PAVATEX wood fibre insulating boards which blend in perfectly with the historical fabric of the building and thus satisfy all the physical requirements to the letter. As a result, the newly renovated building now meets the stringent KfW 60 energy standard applicable to new builds in Germany.

Landshut is among the few German towns whose original medieval centre is still largely intact. One of its most splendid thoroughfares is "Neustadt", the main road which runs through the centre of the town and is lined with many medieval commercial and residential properties still in their original condition. Number 527 is a particular jewel: a three-storey commercial and residential building dating back to 1496 which, with its neo-Gothic facade, is one of the road’s most striking properties.

Preservation order a challenge

Rudi Napholtz, who owns an interior design and furnishings store in Landshut, also fell for the charm of this medieval property. After purchasing it in 2007, he decided to have it renovated as authentically as possible. "I recognised the potential of the structure despite its desolate condition," explains the client, who had already renovated several similar properties. The building is structured in two parts: the 100 m² old section with its street-facing facade, and a 65 m² annex to the rear. Whereas the latter was at risk of collapse and so had to be completely demolished and replaced, the main building which carries a preservation order was to be renovated from top to bottom. This was no simple task because here, too, the building’s structure posed the greatest problems. The reason for this was inappropriate renovation work carried out in the 19th century, in the course of which, for example, what had formerly been a continuous chimney had been truncated at ground-floor level with the remains – since removed – supported merely by a single, heavily overloaded beam. And in the roof area, the feet of the roof truss were rotten due to a leak in the roofing material and had to be reconstructed. Today, the house’s stability is underpinned by 7 tonnes of steel girder set into the building to provide additional reinforcement throughout.

Successful renovation using sustainable natural products

Once the structural problems had been resolved, client Rudi Napholtz went ahead with the actual renovation. He had to comply with local requirements for listed buildings which stipulated, for example, that the facade must not be changed and thus that the exterior walls should be insulated on the inside. The ancient timber framework around the intermediate ceilings and the roof truss, to name just two examples, also had to be preserved. At the same time, the building had to meet the KfW 60 energy standard (eligible for subsidy) that is applicable to new builds in Germany today. "The aim of a renovation project is to maintain the charm of the original building while reaping all the benefits of a new build," says Rudi Napholtz. "Wherever possible we wanted to use eco-friendly, sustainable natural products which would blend in perfectly with the historical fabric of the building." In addition to meeting requirements in terms of thermal insulation, the key renovation objectives included excellent acoustic insulation around the wooden intermediate ceilings and effective protection against overheating in the summer months.

Cost-effectiveness of PAVATEX system solutions confirmed

PAVATEX offers a range of high-performance system solutions featuring multifunctional and eco-friendly wood fibre insulating materials which cater specifically to requirements of this nature. Thanks to their outstanding biological and physical characteristics, these have proved their worth in numerous projects over the years – especially when it comes to renovating old buildings like the one in Landshut. "Before the project, I read up on the many different types of insulating material and ultimately opted for PAVATEX," explains Rudi Napholtz. "The wood fibre boards not only offer optimum insulation values, they are also extremely cost-effective to work. As eco-friendly wood products, they also blend in perfectly with the existing fabric of the building."

PAVATEX handles any insulation-related task

In this renovation project, internal insulation of the listed facade and the necessary acoustic insulation of the area around the intermediate ceilings were among the main challenges to be faced. "The PAVATEX systems provided optimum solutions to all the technical requirements," says Lothar Zieglmeier who, as head of regional sales at PAVATEX, co-supervised the renovation project from the outset. "PAVATEX wood fibre insulating boards not only provide highly efficient thermal insulation, effective acoustic insulation and protection against overheating in the summer months, but also balance out the dimensional tolerances that are always present in any old building." Moreover, thanks to their natural permeability, PAVATEX wood fibre insulating boards can absorb condensation and release it again as water vapour which not only guarantees a pleasant, regulated living environment but also guards against moisture-related damage.

PAVATEX insulating solutions for roofs, walls and floors

80 mm PAVADENTRO boards were used for the internal insulation of the facade. Specially developed for the internal insulation of exterior walls, these wood fibre insulating boards were used to cover an area of some 55 m² to produce an average U-value of 0.35 W/(m²K). For the roof area, 35 mm ISOLAIR L sarking boards spanning an area of around 250 m² provide effective protection against overheating in the summer months while also enhancing the building’s thermal and acoustic insulation. 40 mm PAVATHERM-PROFIL boards with integrated coupling battens were used for the integrated ceilings. This innovative, floor-levelling system covering a total area of 300 m² provides a floor structure with ideal acoustic and thermal insulation values, enabling what is virtually a floating wooden-panel floor to be laid without sleepers, which always tend to transmit irritating impact noise from footfall.

Dual climate protection with PAVATEX

By choosing eco-friendly, sustainable wood fibre insulating boards from PAVATEX, client Rudi Napholtz has not only ensured that this historical building meets all the requirements of the German KfW 60 energy standard, but has also made a valuable and measurable contribution to protecting the climate. This is fully in keeping with PAVATEX’s own climate protection campaign, "Become a CO2 Champion", which calls on clients to actively reduce CO2 emissions by using wood fibre boards from PAVATEX to insulate their buildings, and rewards top climate enhancers with attractive prizes. The PAVATEX wood fibre insulating boards used in this project offset around 15,000 kg of CO2 from the global CO2 balance. That is the amount of CO2 that the wood permanently removed from the atmosphere and, thus, from the global climate cycle, while it was growing. There is also, of course, the insulating effect of the PAVATEX products themselves, which permanently reduce the building’s CO2 emissions and help cut heating costs. So PAVATEX wood fibre insulating materials not only help protect the climate, but help ease the strain on your pocket, too. With their unique physical properties, they ensure that even historical buildings like the one featured in this report can be given a modern and multifunctional envelope so that they are preserved for future generations for many decades, or even centuries, to come.