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JMS Automatic U-value Calculator

Our u-value calculator within JMS reduces the headache of complying with Building Regulations by calculating the whole item u-value of your joinery item, taking into consideration the timber type, section size, overall size, spacer bar and materials used.


JMS provides printed reports showing how the u-value has been calculated and u-value certificates; proof of compliance for you to give to your customers. JMS provides a cost effective alternative to testing each individual window or door.


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Joinerysoft’s u-value Certificate gives proof of compliance for you to give to your customers



All manufacturers in the UK should be providing whole item u-values for external windows and doors, not just centre pane values.


Joinerysoft’s thermal transmittance calculations are verified by BSI, The UK National Standards Body, so you can be sure that our software complies with legislation.


The u-value is displayed in JMS at the design stage so you can check compliance and advise your customer of necessary changes to improve the u-value.


JMS calculates both the model window u-value, based on a window 1230x1480, and also the calculated u-value. This allows you to choose the better u-value, if different, as either are accepted for compliance with building regulations.

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Joinerysoft on Cloud Nine with Launch of JMS Cloud Management Information

Joinerysoft is proud therefore to introduce JMS Cloud. At Joinerysoft, the company has designed a private and secure storage area for all your management information that you can access remotely via the internet on many devices. This removes limits of where and when you can access your data, allowing you to be more flexible, utilise resources better and provide a better service to your customers. The key feature of JMS Cloud is that it links seamlessly with Joinerysoft’s desktop software JMSv2 and JMS3D so you only need to input data once (even historical data can be imported).

On the cutting edge: JMS now controls five-axis pod & rail CNC

Over the last 10 years Joinerysoft has had a track record of linking to the SCM range of windowlines, 1, 20, 40; the Soukup Crafter, and the SAOMAD Titanium as well as running a variety of cross cut machines.

Software proves essential for small Dorset joinery business

IF YOU’VE EVER struggled to justify the cost of software for your joinery business, then read about James Selby who runs a small joinery business in Blandford Forum, Dorset. After two years using Joinerysoft’s Joinery Management Software (JMS), James says, “To be honest, I don’t think I’d want to run a joinery business without JMS now!”

"I can show customers the u-value certificates and CE labels and it definitely wins work."
Tom Renshaw, Groby Joinery


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