Carriage House Specifications


Free construction is carried out by our fully trained staff rather than sub-contractors within a 50-mile radius of our workshop in Netherstreet, Chippenham, Wiltshire. Please contact us for construction charges outside of this area.

All sections are bolted together.

Two heavy duty anchor brackets are fitted to the uprights of each 3.6m wall. These are then bolted to the base using mechanical fixings.

All fixings are fully galvanised.


We are pleased to offer Free Delivery within a 50-mile radius of our workshop in Netherstreet, Chippenham, Wiltshire. Please contact us for delivery and charges outside of this area.


Ideal range eaves height is 2135mm including the plinth.

Elite range eaves height is 2480mm including the plinth.


Our preferred method is high pressure – commonly known as Tanalised or CCP. Non-toxic to animals.


Ideal range 75mm x 50mm tanalised, C16/C24 strength graded, planed timber @ 610mm centres.

Elite range 100mm x 50mm tanalised, C16/C24 strength graded, planed timber @ 610mm centres.


We only use top quality 5th-grade Scandinavian redwood, fully tanalised for longevity against fungal decay & insect attack.

Ideal Range 16mm x 125mm

Elite Range 19mm x 150mm


Our standard offering is black Onduline with a minimum 15-degree pitch.

Elite Range One sun reflective clear roof sheet fitted to all units, not including Tack Rooms.

Alternatively, you may want an attractive felt shingle roof. Add a touch of originality price on application.


Lined with 11mm OSB for additional strength and longevity (this feature is not included when metal box profile roofing is selected). Lined Onduline roof also provides a cooler environment in the summer and warmth in the winter months.

Roof Timbers/Purlins

125mm x 47mm C16/24 stress graded purlins @ 600mm centres. Front/Gutter purlins 150mm x 50mm C16/24 stress graded.


Fitted to both sides of all buildings as standard, we use a half round black guttering and include the necessary downpipes.


Permo® frame is a single layer, vapour permeable membrane for use on timber-framed walls behind the external cladding.


Ideal range buildings are lined to eaves height. As standard, we use 11mm OSB moisture resistant (Oriented Strand Board), manufactured to BS5669. If you would prefer 12mm 5 layer ply in place of the OSB this can be fitted at an additional cost. Please inform our sales staff when placing your order.

Elite range buildings are lined to eaves height as standard we use 12mm 5 layer ply.


Made from highly durable uPVC, our Rainwater Skirt is fitted behind the external cladding & overhangs the plinth. This prevents any water ingress.


The DPC is fitted to the underside of all sole (bottom timber) plates.


Ideal range 150mm x 150mm softwood decorative posts with curved bracing supplied.

Elite range 150mm x 150mm softwood decorative posts with curved bracing supplied.

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PLEASE NOTE: Timber sizes specified are sawn dimensions prior to machining. We reserve the right to alter our specifications without notice.

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Jon William Stables Limited. Registered Office: 1 Penleigh Road, Westbury, Wiltshire, BA13 3QB

Registered No: 06821404 ENGLAND