What is Roof Underlay?
Roof underlayment is a crucial roofing component installed directly over the top of your roof decking. It lies between your decking and roofing material to provide an extra layer of protection from the elements such as water infiltration, harsh weather, and enhances the overall durability and longevity of the roofing system.
Why EcoPro Fibre Cement is right choice for roof underlay?
Fibre cement boards are manufactured using blend of fly ash, cotton rug pulp, Portland cement, and other additives. This combination creates a durable, eco-friendly building material.
Durability and Strength
EcoPro Fibre cement board is made using Portland cement, flyash, cellulose fibres and other additives. The combination of these materials give high compressive strength to board typically ranging from 20 to 40 MPa (megapascals), which ensures that fibre cement can support substantial weight and resist deformation under stress.
Weather Resistant
EcoPro Fibre cement boards are non-porous. It means water or air can’t pass through it. This reduces the risk of leakage and water damage.
Fibre cement board ingredients resist degradation from UV rays and fluctuating temperatures. It maintains its physical properties and appearance over time, with minimal expansion or contraction. EcoPro Fibre cement board can withstand temperatures ranging from -40°C to 80°C, ensuring reliability in diverse climates.
Fire resistant
EcoPro Fibre cement boards formulation makes them non-combustible in nature. It does not burn or contribute to the spread of fire. EcoPro fibre cement board have Class A Rating.
Fire Resistance Properties as per BS-476
| Sr. No. | Properties | Results |
| 1 | Combustibility | Class “0”- non Combustible as per BS476 Part IV |
| 2 | Ignitability | Class “P”- not easily ignitable as per BS476 Part V |
| 3 | Fire Propagation Index | 0.1 |
| 4 | Surface Spread of Flame | Class -1, as per BS 476 Part VII |
Mold Resistant
Unlike organic material like wood, EcoPro fibre cement board does not rot or decay, ensuring a longer lifespan and reducing maintenance needs. Its water-resistant properties significantly reducing the risk of mold growth and fungal decay.
Sound Insulation
High density of EcoPro fibre cement board helps reduce the transmission of sound waves. Its texture and ingredients absorb sound waves to some extent. Ecopro fibre cement board have good ACOUSTIC ratings more than 26db, which indicates good sound insulation.
| Acoustic Insulation | db | BS 2750 | 26 db (6 mm board) |
Recommended size for Roof Underlay
Use 16mm or 18mm thick EcoPro Fibre Cement Boards for underlayment. Grid necessary for underlayment is 610mm X 1220mm center to center. And minimum size of purlin flange is 40mm as per shown in below Fig.
EcoPro Fibre cement is the ideal choice for roof underlay due to its exceptional technical attributes, such as durability, weather and fire resistance, pest and rot resistance, and eco-friendly manufacturing processes. EcoPro from Sahyadri Industries exemplifies these benefits by using advanced technology and sustainable practices to produce a high-quality, reliable roofing solution. Its ability to maintain performance across various environmental conditions, combined with its commitment to sustainability, makes EcoPro an excellent choice for superior roofing systems.
