Flat Roofing Solutions

IDF offers a variety of roofing insulation options to suit individual project specifications with solutions for acoustic performance, compressive strength, fire performance, sustainability, and thermal efficiency. Our flat roofing insulation products are manufactured to the highest standards, utilizing cutting-edge technology and precision engineering.

EPS Insulation

Expanded Polystyrene (EPS) offers an exceptional balance of thermal performance and structural integrity, with increased compressive strength variants available to meet specific loading requirements. The material's inherent flexibility allows for fabrication to suit roof falls from 1:30 to 1:120 specifications.

The thermal performance of EPS ranges from 0.032 to 0.040 W/mK depending on density, while compressive strength options extend from 70kPa to 200kPa. This versatility makes EPS particularly suitable for large span roof areas where lightweight construction is essential.

Applications

  • Large span roof areas

  • Complex drainage schemes

  • Refurbishment projects with limited structural capacity

  • Cost-effective industrial building solutions.


XPS Insulation

Extruded Polystyrene (XPS) represents the ultimate in high-performance insulation where exceptional compressive strength is paramount. With compressive strength capabilities extending to 700kPa, XPS is primarily utilized in inverted flat roofing applications and scenarios involving high structural loading.

The material's virtually zero water absorption and closed-cell structure prevents moisture ingress, ensuring no performance degradation in wet conditions. Thermal performance ranges from 0.029 to 0.036 W/mK.

Applications

  • Inverted roofing systems with ballast or paving

  • Plaza deck applications

  • Car park deck insulation

  • High-loading industrial flooring.

PIR Insulation

Polyisocyanurate (PIR) insulation represents the pinnacle of thermal performance, with thermal conductivity as low as 0.024 W/mK, making it one of the most thermally efficient insulation materials available. This exceptional performance allows architects and specifiers to meet increasingly demanding thermal requirements while minimizing insulation thickness.

PIR's versatility extends to its compatibility with various waterproofing systems. The material is available with tissue facings for torch-on applications, foil facings for enhanced vapor control, and glass tissue variants for compatibility with adhesive systems. Our manufacturing capabilities allow for pre-bonding of PIR boards to thicknesses over 600mm, creating highly efficient single-layer solutions.

Applications

  • New build commercial and residential projects

  • Refurbishment schemes

  • Warm roof constructions

  • Hybrid roofing systems

  • Green roof applications

Mineral Wool Insulation

Our mineral wool insulation utilizes non-combustible stone wool technology, delivering exceptional fire performance classifications alongside superior acoustic properties. With non-combustible classification to EN 13501-1 Class A1 and a melting point exceeding 1000°C, the material maintains structural integrity even under extreme fire exposure.

From an acoustic perspective, mineral wool provides superior sound absorption properties and effective airborne sound insulation. Technical specifications include thermal conductivity ranging from 0.034 to 0.040 W/mK, with density options from 90kg/m³ to 150kg/m³.

Applications

  • Schools, hospitals

  • Public buildings

  • Multi-residential developments

  • Commercial buildings requiring high fire resistance ratings

  • Heritage buildings.


Cork insulation represents the pinnacle of sustainable building materials, offering 100% natural insulation derived from the bark of cork oak trees in Portugal. This remarkable material provides 50-60 year durability while delivering excellent thermal and acoustic performance.

As a completely renewable resource where bark regenerates every 9-12 years, cork actively supports sustainable forestry practices. The material is carbon negative, storing more CO2 than it emits during its lifecycle. Performance characteristics include thermal conductivity ranging from 0.037 to 0.042 W/mK, with natural resistance to moisture, insects, and rodents.


Applications

  • Eco-friendly building certifications (BREEAM, LEED)

  • Historic building renovations

  • Green building projects requiring natural materials.

Cork Insulation

Flat Roofing Ancillary Insulation Products

  • Description tOur drainer boards provide sophisticated solutions to standing water around roof perimeters. These bespoke products ensure effective water removal while maintaining continuous insulation performance, with enhanced falls of 1:30 for superior drainage performance.

  • Pre-fabricated gutter insulation systems manufactured in accordance with BS 6229:2018 with minimum 1:80 falls. These systems ensure effective drainage while maintaining thermal integrity throughout the roof assembly.

  • Pre-formed insulation angle fillets provide essential detailing solutions for built-up roofing applications, available in PIR with various facings and mineral wool options for enhanced fire performance.

  • Pre-formed OSB/PIR laminate offering excellent alternatives to traditional timber fabrication while eliminating thermal bridging. Available in thicknesses from 50mm to 550mm.

  • Precision-manufactured mitre boards providing falls in two directions at exactly 45 degrees. Available in valley and hip configurations with specific fall rates from 1:60 to 1:80.

  • Pre-formed outlet sets minimize standing water around internal roof outlets, with 3000mm x 3000mm standard coverage area and multiple valley formations directing water to central outlets.

  • Lamella insulation is a pre-cut insulation product which follows the existing curvature on a barrel vaulted roof.

    The insulation can be provided with facing to suit waterproofing specification.

Contact Us

For project enquiries, contact our experienced team for bespoke insulation design, technical specifications, product recommendations, and quotations and pricing.

For technical support, our specialists can assist with product selection guidance, installation advice, performance calculations, and compliance requirements.

For surveys and site visits, we offer independent flat roof surveys, site condition assessments, dimensional surveys, and technical feasibility studies.