Farmhouse extension in SIPs, Perthshire

Our client wanted to extend this traditional farmhouse to accommodate their expanding family and they decided to increase the size of the property from 180m² to 360m² - effectively doubling its floorspace. The architect’s brief was to increase the number of bedrooms from three to five and also include a generous open plan kitchen/dining room with boot room, laundry room and WC. The client wanted to mirror the existing traditional architecture within the new accommodation, whilst ensuring the extension was as thermally efficient as possible and were therefore very keen to build using SIPs (Structural Insulated Panels).

  • Date: JUNE 2014
  • Client: PRIVATE
  • Main Contractor: JML SIPS
  • Engineer: ALAN CORSIE


When looking to marry new structures to old, traditional buildings, it is always a potentially difficult proposition, but with accurate site surveying and 3D modelling JML SIPs ensured this was flawlessly achieved. 

To match the existing traditional stonework, reclaimed local stone with lime pointing was used and the new extension roof was slated using reclaimed Scottish slate from a local supplier.

Installing an AGA cooker in the kitchen with an incredibly well insulated SIPs frame has the potential to create overheating problems in summer months. This issue was overcome with a bespoke design for the HRV (Heat Recovery Ventilation) system to help distribute any excess heat throughout the rest of the house.

What The Client Said

"JML SIPs carried out all the works to our new farmhouse extension from the demolition of an existing utility room to the foundations, supply and erection of our SIPs kit extension.  Their team were professional, highly skilled, hard working and great to deal with.  All the internal finishings were completed to a very high standard and the project was completed on time and on budget.  Our new extension is where we spend most of our time with the SIPs providing a cosy and well insulated home for our family.  I can’t believe we rarely have to turn on our heating due to their superb insulating properties!"


JML SIPs carried out all aspects of the project from demolition, groundworks and foundations through to the supply and erection of the SIPs kit and all internal finishings.

Upon completion of the project, it was extremely difficult to tell the difference between the old farmhouse and the new extension due to the stone cladding and slated roof matching so well. Our client was keen to install underfloor heating throughout the ground floor of the extension, although they have since informed us it is rarley required due to the effective insulating properties of the SIPs kit.

This completed extension was given a centre spread in 25 Beautiful Homes Magazine in June 2015.

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