25mm Unilin XtroLiner XO/PR Pitched Roof PIR Insulation Board - 1200mm x 2400mm - Pack of 12

25mm Unilin XtroLiner XO/PR board has a core of modified polyisocyanurate (PIR) bonded to low emissivity textured aluminium foil facings. Unilin XtroLiner XO/PR board offers excellent insulation performance with excellent thermal conductivity. Unilin XtroLiner XO/PR is CFC & HCFC free and is manufactured under the highest standards of ISO 9001 and 14001 Quality and Environmental Management Systems. 

Note: This product was formerly known as 25mm Xtratherm XtroLiner XO/PR Pitched Roof PIR Insulation Board

• High Thermal Performance Rigid Insulation,
• Easy to Install,
• Non-deleterious material,
• Suitable for new build and refurbishment,
• Manufactured with zero ODP blowing agent,
• Reduces Thermal Bridging, 
• Reaction to fire: Euroclass C s2 d0,
• Closed cell structure – moisture resistant

• Pitched roof
• Ventilated roof
• Warm roof
• Above and between rafters
• Under rafters, above ceilings

    

• Allow for ventilation  gaps normally 50mm. (May be reduced depending on breather membrane certification).
  
• Cut XtroLiner boards  to fit tightly between rafters flush with  rafter bottom. An additional 2nd layer should be added  to the underside of the rafter.
• Run second layer transverse to the first.
• Temporarily fix with nails.
• Provide vapour control layer  (Aluminium tape joints).
• Finish with 12.5mm plasterboard fixed  with drylining screws.  S
• crew fix every 150mm, 12mm from  edge of boards.
• All board edges should be supported.

• Ensure cavity wall insulation has continued to roof height to engage with roof insulation.  
• Fix a timber stop rail to end of rafter at eaves.
• Lay Unilin XtrolinerXO/PR insulation stagger jointed over rafters ensuring joints are supported by rafters.
• Ensure boards are tightly butted fill any gaps with expanding foam. A vapour permeable underlay should be fitted; refer to manufacturers Agrèment certification.
• Providing an unvented void under the membrane can improve the thermal performance.
• Fix counter batten with approved fixings.
• Ventilation may have to be provided  subject to certification.
• A second layer of insulation may be added between the rafters.
• Provide a vapour control layer to the underside of the construction. Current Building Regulations/Standards should be considered with regard to  the requirements for and/or provision  of fire stops.