Castlebar Government Offices

Bauder Total Roof System (BTRS) and BauderThermofol PVC single ply waterproofing system


The roof area of this government office building was complex due to expansion joints, air conditioning units and intricate detailing requirements. Work hours had to be agreed with the client to keep disruption to other ongoing work at the site to a minimum and insulation upgrades were necessary to satisfy building regulations. The office also had to remain open throughout the works, causing some logistical challenges. All deliveries were timed so not to cause any disruption to visitors coming in and out of the facility.

Bauder Building Board

Project: Castlebar Government Offices​
Location: Castlebar, Ireland​
Roof Area: 2,500m²
Specifier: Office of Public Works​
Approved Contractor: Deane Roofing & Cladding​

The specification

Bauder’s bituminous system, BTRS, was specified because it is durable, robust and can withstand permanently sited loads of up to 2000Kg/m². The system build-up included Bauder’s 100 mm Thermotech Glass insulation for superior thermal performance, ensuring the roof achieved the required 0.17 U-Value. Small linking roof areas were waterproofed using Bauder Thermofol PVC single ply system, which is long lasting, possessing high tensile strength of over 1100N, and allows for no physical penetrations of the roof.

Products applied

Bauder Total Roof System
Integrated bituminous waterproofing system with a life expectancy in excess of 40 years.

Bauder Thermofol PVC
1.5 mm single ply membrane can be guaranteed for up to 20 years depending on system type.

System installed

Bauder Total Roof System (BTRS)

1 Bauder K5K A heavy duty, torch-applied SBS elastomeric bitumen capping sheet, featuring a spunbond polyester reinforcement to allow the finished product to cope with structural movement without fracture. The mineral finish provides protection against UV degradation.
2 Bauder Thermotech PIR insulation board with a coated glass tissue facing on both sides.
3 BauderPIR FA-TE An efficient PIR insulation board with aluminium foil facing on both sides. The top facing features a printed grid pattern to aid site cutting. It is lightweight and has zero ozone depletion potential.
4 BauderTEC KSD FBS A self-adhesive SBS elastomeric bitumen air & vapour control layer, with a mica finish.

Bauder Thermofol PVC single ply waterproofing system

1 Bauder Thermofol U15 FR A 1.5mm thick, reinforced PVC waterproofing membrane. Stated within BBA certificate 06/4354, the Thermofol PVC waterproofing membranes have a service life in excess of 35 years. 
2 Bauder PIR M Tissue-faced flat board insulation, benefitting from a zero ODP and a Green guide rating of ‘A’.
3 BauderTEC KSD FBS A technically advanced self-adhesive elastomeric bitumen air and vapour control layer with an aluminium foil facing for vapour impermeability.


Project specifier, Tony Collins, Office of Public Works:
“Bauder delivered a comprehensive roofing solution that utilised their top quality products and unrivalled technical support. Despite the design and logistical challenges encountered, the new roof system was delivered on time and to budget much to the delight of the client”