When it comes to thermal insulation, getting U-values right can be a tricky business, especially when looking at different construction build ups. As part of its ongoing drive for fuss-free specification, EcoTherm has produced a free online Uvalue calculator, which provides a guide to the thickness of its products needed to meet U-value requirements for roofs and walls.<br> <br> Part of the EcoTherm Toolbox, the U-value calculator has a "tweak tool", so that it is easy to alter each element to achieve the perfect solution, Ecotherm says. The tool automatically calculates the right thickness of EcoTherm insulation to reach the desired thermal performance. An interactive product selector is also available to quickly identify which EcoTherm product is right for the job.<br> <br> The calculations produced by the online calculator allow specifiers to clearly see the impact of changing individual elements, whilst simple to follow instructions lead to the desired U-value and provide a guideline to which solutions will be best, says EcoTherm.