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Frequently Asked Questions

  • Why do I need foam insulation?
    There are a number of benefits to installing foam insulation in your home. The primary benefits are that it can; improve EPC rating, save on energy costs, reduce airborne noise pollution, improve air quality and moisture management and reduce cold air crossing to the inside living space. All of these come together to improve living or working conditions
  • Will spray foam cause my timbers to rot?
    No. Sprayed foam insulation has the same ‘breathability’ as hard wood so does not cause timbers to rot, in fact as foam insulation reduces the chance of surface and interstitial condensation your timber should have a prolonged life. If timbers are already damp, or have some form of rot or woodworm, they should be treated and allowed to dry before foam is applied. This allows the foam insulation to adhere to the surface correctly, thus ensuring a fully maintained layer of insulation.
  • Does spray foam insulation present a fire risk?
    Our spray foam insulation provides far less fire risk than the wooden elements in the roof. The system has been tested to British Standards and certified as a Class 1 fire rating when tested to BS 476 Part , meaning that the foam is effective in resisting the spread of flame.
  • Once the foam insulation is installed can alterations be made to the roof/structure?
    Yes alterations can be made. Open cell products are very easily modified and removed; it is a lighter consistency than closed cell. Closed cell can often be used as a bonding agent and can be more difficult to alter and remove but it is still possible. You should always ask for help when attempting to alter or remove foam insulation if you are unsure
  • What is the foam insulation made of? Is it environmentally safe?
    The foam insulation is made up of two components that are mixed together to create an exothermic reaction. These components can differ between suppliers of the compounds. Generally the compounds consist of a bonding agent and a resin. Yes the compounds are environmentally safe. The products are tested and rated by suppliers and show an extremely low Global Warming Potential and no Ozone Depletion Potential.
  • How are polyurethane foams applied?
    The polyurethane foam we use is spray-applied. There are two-component products that include a hardener and a resin. It is not a wet application – no water is used. During application, there is a chain reaction between the two components that creates a bond to the substrate as it reacts and expands. It dries, cures and hardens within 3-5 seconds.
  • What are the differences between closed-cell and open-cell foams?
    There are a number of differences. Firstly, they achieve different u values for the same density of foam. Closed cell is able to achieve a greater insulation value per centimetre of thickness than open cell foam. However, while closed cell foam is virtually impermeable to air, open cell foam allows far more air and vapour into the building interior which can be very important depending on the application. We would not recommend open cell foams for treatment of condensation to any substrate that is impermeable. This includes, profiled steel roof and wall cladding and non-breathable roofing felts. The poor vapour resistivity of open cell foams can lead to interstitial condensation and subsequent waterlogging of the insulation.
  • What is an insulating air barrier system?
    A closed-cell, spray-applied polyurethane foam system that combines superior insulation values and near-zero air permeability in a single application to improve building durability, energy efficiency and occupant comfort, health and safety.
  • Does polyurethane technology control air leakage and drafts?
    Our polyurethane foam roof and wall systems have been tested as an air barrier at an application of 50mm thickness. Once applied, our roof and wall systems are fully-adhered and do not allow air to flow around, behind or through the insulation system. Most open-cell foams have not been tested and therefore do not qualify as air barrier systems. Open-cell foam products require an application of up to 125mm to control air leakage.
  • Can spray foam cure mould?
    Mould requires three things to grow: moisture, warm temperatures and a food source. Polyurethane foam insulation has no nutritional value and is not considered a food source for mould. The use of polyurethane as insulation eliminates surface condensation and reduces the potential to accumulate moisture. It also eliminates air movement within the wall cavity. Other insulations are less successful at controlling air infiltration and providing adequate insulation to eliminate surface condensation, thus increasing the possibility of an environment susceptible to mould.
  • Can an insulation system add structural strength?
    Spray-applied closed-cell polyurethane foam is the only insulation material that adds structural integrity throughout the wall system. Testing shows spray-applied polyurethane foam insulation between wood- and steel-stud wall panels, increases rack and shear strength, two to three times compared with standard timber frame components with glass fibre insulation

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