Build Check have built the “Oracle” tool to enable window installers and fabricators an all-in-one tool to simulate U value calculations and provide templates and guidance. Build Check are a UK Approved Body and can carry out Initial Type Testing (ITT) for UKCA Marking (formally CE Marking).

Once you have registered your Oracle Account you can then have access to a great range of features and tools:

  • Create your Quality Control System (FCP) - Use the simple Oracle Factory Production Control (FCP) template and Guide.
  • Recognised by FENSA and Certass, The U Value Calculator will check the thermal, acoustic and product performance of your windows & door sets with the Oracle U Value Calculator
  • Make sure your Products have Initial Type Testing - Follow the Oracle UKCA Mark check list to ensure your products have valid Initial Type Testing (TT).
  • Complete a Declaration of Performance for your products - Use the Straightforward Oracle Declaration of Performance (DOP) template and guide.
  • Apply a UKCA Mark to your products - Use the Oracle UKCA Mark template and guide.
Building Calculations

U-Value Calculator

Calculations from the Oracle online U-value calculator are recognised by FENSA and Certass for their competent person schemes. Once subscribed, it’s quick and easy to assess product performance and is pre-loaded with product data for many popular window and door set suites from major PVCu window system companies.

Window Energy Ratings – the Oracle U-value calculator can help find the right glass and frame combination for your WERs.

Build Check Oracle Calculator

Acoustic Calculator

The Acoustic Calculator on the Oracle is a cost-effective alternative to acoustic labelling and testing schemes. It enables subscribers to the Oracle to quickly calculate the acoustic performance of a range of frame and glazing options and in most cases, with no need for acoustic testing in a laboratory.

Subscribers can then have the calculations verified with a report from an accredited UKAS-notified body such as Build Check Limited. We are a UKAS-accredited testing laboratory body No. 4044.

Acoustic performance of glass

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