Frequently Asked Questions

1. Have Kontrol Duo & Kontrol R1.9 been passed by building regulations?
   Kontrol Duo & Kontrol R1.9 meet the U-value requirements of the Building regulations Approved Documents L1A and B for a warm roof build.
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2. Who have Kontrol Duo & Kontrol R1.9 been tested by?
   Kontrol Duo & Kontrol R1.9 have received accreditation from the BBA and both have undergone component testing from accredited test houses.
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3. How have Kontrol Duo & Kontrol R1.9 been tested?
   Kontrol Duo & Kontrol R1.9 have been thermally tested by the Heat Flow Meter method. All other important physical tests eg Surface flame, Water Vapour Transmission, Nail tear strength have been tested by recognised international standards.
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4. What is the guaranteed life span of the Kontrol Duo & Kontrol R1.9?
   Kontrol Duo & Kontrol R1.9 are rot proof and do not tear easily. When installed as specified they will have a life equivalent to that of the roof structure of which it is incorporated.
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5. How does Kontrol Duo achieve its U Value?
   Once installed Kontrol Duo achieves its U Value through the product's high emissivity foil surfaces, excellent thermal properties of the microfibre component and enclosed air gaps.
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6. Are Kontrol Duo & Kontrol R1.9 weather-proof?
   Kontrol Duo & Kontrol R1.9 products are encapsulated with a tough waterproof fabric so as long as cut ends and perforations are sealed the products will withstand some adverse weather. However as with all insulation products, we recommend that the product is kept clean and dry, and direct sunlight should be avoided.
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7. How are Kontrol Duo & Kontrol R1.9 products finished / sealed at the Eaves / Ridge?
   Kontrol Duo & Kontrol R1.9 products should be trimmed with an excess of over 50mm. This excess is folded against these timbers and stapled/nailed into position. The cut edge is then covered with Kontrol Tape.
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8. How are Kontrol Duo or Kontrol R1.9 installed in a refurb?
   Either product is fitted to the underside of the rafters and the installation completed by battens and a plaster board. To obtain specific U-values other insulation may be inserted in the rafter gap between the roof felt/membrane and Kontrol. This build needs to be thermally assessed using proprietary U value calculators, such as BuildDesk. To access BuildDesk, please click on the following link.
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9. How has Kontrol Duo been used before? How can I see evidence?
   The product has been installed on test bed installations. Installation can be viewed on our DVD. We can arrange viewing of current installations but the final product is not visible once installed as it is incorporated in the complete roof structure.
   For further information on viewing please contact our Sales & Technical Hotline on 01924 483243.
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10. Can Kontrol Duo and Kontrol R1.9 be used with Steel (Industrial) constructions?
    All areas that are not covered by the BBA certificate, as per this application, need to be discussed with the Kontrol Technical team. For further information, please call our Sales & Technical hotline on 01924 483243 or via sales@kontrol-insulation.com
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11. How important is the air gap to the performance of Kontrol Duo?
    The air gaps are an important aspect. A min of 25mm between each surface is needed to ensure the U Value can be achieved.
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12. What happens if Kontrol Duo or Kontrol R1.9 sags and the air gap is reduced?
    Once installed, as detailed in the BBA 07/4477, the product will remain in position. The installation details are designed to ensure the air gaps are maintained.
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13. Why do I need to counter-batten during installation?
    To achieve the required min 25mm air gap. This then ensures the U Value can be achieved.
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14. How do you account for electrical wiring / light fittings etc. in order to maintain the U value?
    To maintain the U value all service holes should be repaired with Kontrol Tape in order to keep the product air tight.
    To avoid overheating of inset Downlights, Kontrol needs to be 50mm away from the unit. To maintain the air seal we recommend that the cut edge be sealed and adhered to the plasterboard using Kontrol tape. To maintain air tightness the downlighter needs to have a suitable sealing gasket.
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15. Why do you need to tape the Kontrol Duo or Kontrol R1.9?
    To keep the installation air tight to ensure the U Value of the system is not compromised.
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16. How long will the Kontrol tape last?
    For the duration of the roof structure.
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17. Where can I buy the Kontrol Tape from?
    Contact the Sales Team for your nearest stockist on 01924 483243 or via sales@kontrol-insulation.com
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18. Can you walk on Kontrol Products?
    Kontrol Duo & Kontrol R1.9 are tough products and able to withstand some abuse but when at the site Construction Site Health and Safety needs to be followed.
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19. How can I obtain technical information on site?
    The Technical Team are only phone call away, please contact 01924 483243 for further information.
    Fitting instructions can be found on the back of all packaging.
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20. What are the environmental benefits of the products?
    Kontrol Duo & Kontrol R1.9 are new energy saving products that ensures the roof installation achieves compliance with the current Building Regulations and so helps reduce CO2 emissions. Kontrol will maintain its thermal performance throughout the buildings life and comprises of a high proportion of recyclable components.
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