Porcupine Partnership

The Porcupine Partnership incising machines have been developed and tested extensively over several years by the Porcupine Partnership of BSW Timber and AV Birch. This technologically advanced system is an industry game-changer. BSW Timber have conducted years of detailed, patient development and testing into incising.  More recently through the partnership with AV Birch, the Porcupine machines have now been perfected to deliver an engineered system that gets the very best out of treated timber.

BSW Timber GroupBSW Timber Group are the largest sawmiller in the UK. We have been processing and adding value to timber products in the UK for over 160 years.

We are also the largest high pressure timber impregnation processor with more than 50 years experience in timber preservation here in the UK.

Our vision is to encourage innovation to optimise manufacturing capability and commercial development. Our values shape how we drive our business and guide our behaviour.


A V Birch LogoA V Birch Limited are the leading manufacturers of Timber Engineering machinery in the UK. We are specialist in engineering and the fabrication of mild steel, stainless steel and aluminium.

We provide a complete solution from concept to installation including all fabrication, machining, hydraulics, pneumatics and electrical work, all of which is carried out by our experienced in-house team.

Our Service team provide the responsive aftersales support required in today’s business world.

For over 30 years we have set the standard in quality engineering and fabrication services to clients.