Brief Description:
Full renovation of a 1900s granite 3 storey building in Aberdeen. It was previously 3 flats but converting it into 2 flats, one which we will be living in.
Specific Aims:
An upgrade of the entire building, improve the energy efficiency and air quality of the building.
Why Sisalwool
Selection Criteria:
We wanted a breathable and natural insulation that could deal with moisture in existing walls and keep to the original design concept of the building with a vapor open wall construction.
Aberdeen gets a lot of rain, and the granite walls absorb moisture, so it was important that we were insulating with something that was not going to trap moisture and allow vapor to pass through.
Benefits of using Sisalwool
Better indoor air quality, minimise risk of damage to building fabric, increased energy efficiency
Installation of Sisalwool
The walls were stripped back and a 4x2 stud wall built with Sisalwool 100 friction fitted between. A 35mm Woodfibre board installed over the stud frame to combat cold bridging, and an intelligent membrane installed over with a service cavity and plasterboard finish.
In some areas the original timber studs were left and Sisalwool friction fitted between.
The sloped roof was stripped and Sisalwool 100 friction fitted between the rafters and a 50mm ventilation cavity left between the sarking board.
The loft had Sisalwool 100 installed between the joists and Sisalwool 100 over the joists.
Underfloor had Sisalwool 100 friction fitted between the Joists.
Contractor/Installer Feedback:
The guys on site really enjoyed using it. Easy to cut, fast to install and safe to work. Also, there was basically no waste as off cuts could be used elsewhere unlike PIR.