Menu
Menu
Your Cart

99mm Unilin Plydeck Flat Roof Board - 90mm PIR Bonded to 9mm OSB Board - 2400mm x 1200mm

99mm Unilin Plydeck Flat Roof Board - 90mm PIR Bonded to 9mm OSB Board - 2400mm x 1200mm
99mm Unilin Plydeck Flat Roof Board - 90mm PIR Bonded to 9mm OSB Board - 2400mm x 1200mm
  • Product Code: A1-6210
  • Delivery Time: 1-3 working days
  • Brand: Unilin (prev. Xtratherm)
  • Model and Size: 2400mm x 1200mm - 2.88m2
  • Weight: 28.28kg
Our ratings on 16-07-2025:
Google My Business Reviews
4.8 out of 5
Show other thicknesses

99mm Unilin Plydeck Flat Roof Board - 90mm PIR Bonded to 9mm OSB Board - 2400mm x 1200mm

Length: 2400mm
Width: 1200mm
Thickness: 99mm
Board Coverage: 2.88m2
Pack Coverage: 2.88m2
Weight/m2: 9.82kg
Weight: 28.28kg
Thermal Conductivity: 0.022W/mK
R-Value: 4.1m2K/W
Compressive Strength: 150kPa
Fire Rating (Reaction to Fire): F

99mm Unilin Plydeck Flat Roof Board is a high-performance composite board designed for flat roof applications. It comprises a 90mm rigid polyisocyanurate (PIR) insulation board directly bonded to a 9mm OSB board. This combination provides both high levels of thermal insulation and a robust decking surface in a single operation, significantly streamlining the construction process for both new build and refurbishment flat roof projects. By integrating insulation and decking, the Unilin Plydeck board simplifies installation, reduces the number of steps required, and can potentially save time and labour costs on site. Its lightweight nature also aids handling and installation. This dual-functionality, coupled with its high thermal performance and durable construction, makes it a practical and efficient solution for achieving a well-insulated and structurally sound flat roof.

Note:

  • This high performance roof insulation board was formerly known as 99mm Plydeck Xtratherm (PIR with OSB Board)
  • R-Value is for the PIR core
  • Bonding of the Unilin Insulation board with other materials may be made by a different fabricator.
CHARACTERISTICS

  • Composite construction board.
  • Provides both high levels of thermal insulation and a robust decking surface in one product.
  • Excellent thermal conductivity for effective heat loss reduction and energy efficiency.
  • Offers a stable and durable substrate for waterproofing systems.
  • PIR core features tough, fibre-reinforced thermoset laminate facings for enhanced strength and dimensional stability.
  • Single-layer application reduces installation time and complexity compared to installing insulation and decking separately.
  • Suitable for new build and refurbishment flat roof projects.
  • Lightweight and easy to handle.
  • Contributes to the overall fire safety of the roof structure.
  • Achieves required U-values with potentially thinner construction compared to separate insulation and decking.
APPLICATION

  • Flat roof applications.
INSTALLATION

  • Ensure the supporting structure (e.g., joists, rafters, existing roof deck if applicable) is sound, level, and free from debris.
  • Start laying the boards from a defined starting point, typically the lowest point of the roof or an edge.
  • Lay the boards with the plywood side facing upwards, ready to receive the waterproofing system.
  • Ensure boards are laid with tightly butted joints. Do not force the boards together, as this can cause damage or distortion.
  • Stagger the joints between adjacent rows of boards to avoid continuous lines of weakness.
  • Mechanically fix the Plydeck boards to the supporting structure using appropriate fixings at specified centres.
  • Ensure fixings are driven in straight and to the correct depth, without over-tightening which could compress the insulation.
  • Cut boards as necessary using appropriate cutting tools to fit around penetrations (e.g., pipes, vents), rooflights, and at roof edges.
  • Ensure accurate cutting to maintain a tight fit.
  • Once the boards are laid and fixed, inspect the surface to ensure it is clean, free from damage, and that all joints are properly butted.
  • Ensure all fixings are correctly installed.
  • Once the Plydeck boards are securely installed, the chosen flat roof waterproofing system can be applied according to the manufacturer's instructions.
  • Ensure the waterproofing system is compatible with the plywood surface of the Plydeck board.



Brand: Unilin (prev. Xtratherm) Model and Size: 2400x1200mm - 2.88m2
Delivery Time: 2 - 3 working days
81mm Unilin Safe-R SR/STP Phenolic Soffit Plus Board (75mm Phenolic + 6mm Building Panel) is a superior performance ceiling insulation board with enhanced fire performance, consisting of an Euroclass B s1 d0 phenolic foam core with negligible smoke obscuration. Unilin Safe-R SR/STP phenolic core is ..
Get Best Price
90mm Unilin FR/MG Flat Roof Board - pack of 5 90mm Unilin FR/MG Flat Roof Board - pack of 5
Guide Price
Brand: Unilin (prev. Xtratherm) Model and Size: 1200mm x 1200mm - 7.2m2
Delivery Time: 3 - 5 days
90mm Unilin FR/MG is a high performance PIR core with mineral coated glass facers suitable for use below single ply waterproofing systems and partially bonded built-up felt. It is compatible with adhesively bonded single ply roofing membranes laid on mechanically fixed ..
Guide Price: £143.48
£172.18 inc VAT
Get Best Price
Brand: Unilin (prev. Xtratherm) Model and Size: 1200x2400mm - 11.52m2
Delivery Time: 1-3 working days
90mm Unilin XtroLiner XtroDeck XO/XD board has a core of modified polyisocyanurate (PIR) bonded to low emissivity embossed aluminium foil facings. Unilin XtroLiner XtroDeck XO/XD board offers excellent insulation performance with excellent thermal conductivity.Unilin XtroLiner XtroDeck XO/XD bo..
Get Best Price
Brand: Unilin (prev. Xtratherm) Model and Size: 1250x600mm - 10.5m2
Delivery Time: 2 - 3 working days
30mm Unilin XPS 500 is an extremely durable heavy duty thermal insulation board made of extruded polystyrene offering exceptional thermal performance and versatility. It is a lightweight board that is able to withstand extreme loads. It has a rebated edge.CHARACTERISTICSExtremely strong,Compressive ..
Get Best Price
120mm Unilin FR/MG Flat Roof Board - pack of 3 120mm Unilin FR/MG Flat Roof Board - pack of 3
Guide Price
Brand: Unilin (prev. Xtratherm) Model and Size: 1200mm x 1200mm - 4.32m2
Delivery Time: 3 - 5 days
120mm Unilin FR/MG is a high performance PIR core with mineral coated glass facers suitable for use below single ply waterproofing systems and partially bonded built-up felt. It is compatible with adhesively bonded single ply roofing membranes laid on mechanically fixed ..
Guide Price: £108.78
£130.54 inc VAT
Get Best Price
44.5mm Unilin Thin-R Thermal Liner XT/TL-MF - Mech Fix (35mm PIR Insulation bonded to 9.5mm Plasterboard) 44.5mm Unilin Thin-R Thermal Liner XT/TL-MF - Mech Fix (35mm PIR Insulation bonded to 9.5mm Plasterboard)
Guide Price
Brand: Unilin (prev. Xtratherm) Model and Size: 1200mm x 2400mm - 2.88m2
Delivery Time: 1-3 working days
44.5mm Unilin Thin-R Thermal Liner XT/TL-MF is a composite insulated panel of 35mm Unilin PIR core with foil faces bonded to 9.5mm tapered edge plasterboard for mechanically fixing to internal walls. Unilin XT/TL-MF is designed to provide high levels of thermal insulation and dry lining in one opera..
Guide Price: £43.25
£51.90 inc VAT
Get Best Price
This product is listed in the following categories and systems (click to show).