References ⁄ Office and residential building in Bützberg (CH)
 
An old building transformed into an idyllic haven

The house in which MOTOREX Oil of Switzerland was founded is to be found in Bützberg in the canton of Berne: Built in 1816 and now protected by a preservation order, it is a magnificent, albeit dilapidated, half-timbered building in the style typical of the Berne region. Before the Scheidegger family could start living and working in the house, the new owners were faced with a number of problems during renovation.

The timber frame construction with its lime mortar and different types of stone meant that the outer walls had begun to lean and the inner wall surfaces had become very uneven. The new wall construction was designed to compensate for these significant discrepancies. To be able to use the building both as a home and an office, it was necessary to improve the wall insulation and to carefully renovate the entire fabric of the building. Because the façade of the building is under a preservation order, the only way of insulating the outer walls was from the inside. In doing so, a certain degree of vapour diffusion from the inside to the outside had to be ensured while at the same time preventing unacceptable levels of condensation from forming in the construction elements. PAVATEX developed the innovative PAVADENTRO wood fibre insulation board specially to meet this demanding challenge of building science.

Wood fibre insulation board with integrated functional layer

Manufactured using the tried and tested wet process, PAVADENTRO is capable of taking up large quantities of moisture and absorbing any water vapour from the rooms. With all-round tongue and groove, this wood fibre insulation board has a bulk density of 180 kg/m³ and thermal conductivity of 0.044 W/(m K). The wet process used makes it possible to integrate a mineral functional layer into the wood fibre insulation board. This permits controlled accumulation of moisture, which is then redistributed by capillary action, where it is given off into the room. Marcel Scheidegger relates his experience: “A joint effort between PAVATEX and the builders resulted in a structured system that matched our needs perfectly. The results go way beyond our expectations. It’s good to see the positive reactions from visitors, who notice the fantastic room climate. It feels as though the walls are actually warm, and using PAVEDENTRO means that heating costs are reduced to a minimum. This became apparent even during the construction phase: Just one fan heater was used to keep the 180-square-meter house at a temperature of 15 °C throughout the winter, and that was only running for some of the time.”

Better than a traditional vapour barrier

The main aim with restoration projects like the one in Bützberg is always to ensure that the construction elements do not take up too much moisture. Traditional insulation using a vapour barrier is well known to be fraught with risks. PAVADENTRO allows the vapour to diffuse across the entire surface, where it is then redistributed. This means that the average moisture content of the stone wall and timber frame is lower when PAVADENTRO is used than with a vapour barrier. Other benefits: The traditional construction reaches a very high moisture content of 10 kg/m2 in just a short time. When PAVADENTRO is used, the maximum level is a mere tenth of that value and is only reached after a very long time. Experience shows that vapour barriers are very difficult to install accurately. In contrast, PAVADENTRO wood fibre insulation board allows far greater leeway during construction. If no vapour barrier is used, there is one less work step. Plaster can be applied directly to PAVADENTRO, and less material is required. This means that the wood fibre insulation board offers benefits in terms of costs and labour.

An old building transformed into an idyllic haven

The house in which MOTOREX Oil of Switzerland was founded is to be found in Bützberg in the canton of Berne: Built in 1816 and now protected by a preservation order, it is a magnificent, albeit dilapidated, half-timbered building in the style typical of the Berne region. Before the Scheidegger family could start living and working in the house, the new owners were faced with a number of problems during renovation.

The timber frame construction with its lime mortar and different types of stone meant that the outer walls had begun to lean and the inner wall surfaces had become very uneven. The new wall construction was designed to compensate for these significant discrepancies. To be able to use the building both as a home and an office, it was necessary to improve the wall insulation and to carefully renovate the entire fabric of the building. Because the façade of the building is under a preservation order, the only way of insulating the outer walls was from the inside. In doing so, a certain degree of vapour diffusion from the inside to the outside had to be ensured while at the same time preventing unacceptable levels of condensation from forming in the construction elements. PAVATEX developed the innovative PAVADENTRO wood fibre insulation board specially to meet this demanding challenge of building science.

Wood fibre insulation board with integrated functional layer

Manufactured using the tried and tested wet process, PAVADENTRO is capable of taking up large quantities of moisture and absorbing any water vapour from the rooms. With all-round tongue and groove, this wood fibre insulation board has a bulk density of 180 kg/m³ and thermal conductivity of 0.044 W/(m K). The wet process used makes it possible to integrate a mineral functional layer into the wood fibre insulation board. This permits controlled accumulation of moisture, which is then redistributed by capillary action, where it is given off into the room. Marcel Scheidegger relates his experience: “A joint effort between PAVATEX and the builders resulted in a structured system that matched our needs perfectly. The results go way beyond our expectations. It’s good to see the positive reactions from visitors, who notice the fantastic room climate. It feels as though the walls are actually warm, and using PAVEDENTRO means that heating costs are reduced to a minimum. This became apparent even during the construction phase: Just one fan heater was used to keep the 180-square-meter house at a temperature of 15 °C throughout the winter, and that was only running for some of the time.”

Better than a traditional vapour barrier

The main aim with restoration projects like the one in Bützberg is always to ensure that the construction elements do not take up too much moisture. Traditional insulation using a vapour barrier is well known to be fraught with risks. PAVADENTRO allows the vapour to diffuse across the entire surface, where it is then redistributed. This means that the average moisture content of the stone wall and timber frame is lower when PAVADENTRO is used than with a vapour barrier. Other benefits: The traditional construction reaches a very high moisture content of 10 kg/m2 in just a short time. When PAVADENTRO is used, the maximum level is a mere tenth of that value and is only reached after a very long time. Experience shows that vapour barriers are very difficult to install accurately. In contrast, PAVADENTRO wood fibre insulation board allows far greater leeway during construction. If no vapour barrier is used, there is one less work step. Plaster can be applied directly to PAVADENTRO, and less material is required. This means that the wood fibre insulation board offers benefits in terms of costs and labour.