Note: the thickness shown are to meet the specified U-Values and may not reflect the commercial thickness available. Please get in touch with our technical solutions team to check before ordering.
U-Value Calculator
Our U-value calculator is a free, online tool designed to help specifiers, selfbuilders and construction stakeholders to calculate U-values for their individual projects using ROCKWOOL stone wool insulation.
Access U-Value CalculatorThe ROCKWOOL U-value calculator is a free, online tool designed to help specifiers, selfbuilders and construction stakeholders to calculate U-values for their individual projects using ROCKWOOL stone wool insulation.
With up-to-date information on ROCKWOOL solutions and a series of BIM objects, users can quickly and easily calculate accurate U-values for walls, floors and roofs according to around 2,500 pre-determined calculations. The BIM object for each specific build-up can be downloaded in IFC format to support design and inform specification.
What is a U-Value?
U-value is a measure of the rate of thermal transmittance through a structure or material, which shows how good a thermal insulator or conductor that material is.
U-values are measured in W/m2K and when it comes to insulation, low U-values indicate solutions which offer excellent thermal performance capable of reducing heat loss, improving energy efficiency and promoting indoor comfort.
Using the ROCKWOOL U-value calculator, construction stakeholders can now easily identify insulation solutions which help them meet their thermal targets, and ultimately create buildings which benefit from long-lasting energy efficiency.
How our U-Value Calculator Works
The ROCKWOOL U-Value calculator is backed up by around 2,500 pre-determined calculations which show the overall performance of a wall aseembly, or floor and build-ups featuring ROCKWOOL insulation solutions.
To use the U-Value calculator, simply visit the tool and begin by selecting your application. Follow the on-screen prompts to enter your project details, then use the sliders to adjust insulation thickness or desired U-Value and remember to download your results. To work seamlessly across a selection of ROCKWOOL technical tools, register for an account or log in to improve the experience.
All results delivered by the ROCKWOOL U-Value calculator are downloadable in IFC format for use in specification and design.