Tel. 0345 64 64 646 | 

  AFTER SALES   |    QUOTE   |    BROCHURE |   DOWNLOADS |  region:  UK flag | USA flag | Canadian flag    
 UK: 

Thermal Efficiency

All of our systems have been thermally simulated to indicate the true thermal value, helping you choose the right option for your property and helping you save money on your fuel bills.

The aluminium in our systems is thermally broken. All of our systems are double glazed with low-E glass as standard, we have tested for water ingress and air permeability and are CE compliant. Increased thermal efficiency can be achieved by upgrading your glass choice (emissivity options of 1%, 3%, 5% and 10%) or to triple glazed units with Krypton gas, please ask for further details.

  • 1
    A low U-value is useful during cold days when heating is needed. It is also helpful during hot days when it is important to keep the heat out.
  • 2
    Thermally broken aluminium, and aluminium tracks reduce thermal loss through transfer

U-values

The thermal rating of a window or door is measured in U-Values, the lower the U-Value the better the rating. 

Many companies will give you a U-Value based on the centre pane value or the U-Value of the glass (better than 'A' rated). This value will always be lower than the actual value of the complete window or door. 

All our U-Value calculations are based on the whole door which is frame plus glass.

    
Telephone: 0345 64 64 646
Sales email:
Other enquiries:
The Folding Sliding Door Company is an ISO 9001 and (US) NAMI Quality Assured organisation with nationally recognised accreditations such as CE Compliancy and Document Q in the UK, and Florida Building Code and Dade County in the US.
    
      CLOSE