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This is a summary of the technical specifications relating to our garden buildings. Browse through and do please enquire if you have any questions.

The Floor


  • 8mm laminate flooring
  • 2mm underlay
  • 18mm OSB (Oriented Strand Board)
  • 50mm Rockwool Insulation
  • 50mm Celotex
  • 4x2 Frame Work
  • Stainless Steel Support Cables

Standard Wall


  • 12.5mm Plasterboard Vapour Proof + Skimmed
  • 4x2 Framework
  • 100mm Rockwool Insulation
  • 9mm OSB (Oriented Strand Board)
  • Building Paper
  • 25mm x50mm battens
  • Exterior Cladding

Fireline Wall


  • 12.5mm Fireline Plasterboard
  • Vapour Proof + Skimmed
  • 4x2 Framework
  • 100mm Rockwool Insulation
  • 9mm MAG Ply
  • Building Paper
  • 25mm x50mm battens
  • Juniper Green Fireline Cladding

The Roof


  • 1.5mm EPDM Rubber Membrane
  • 18mm OSB (Orientated Strand Board)
  • 100mm Rockwool Insulation
  • 6x2 Roof Joists
  • 12.5m Plasterboard Vapour Proof
  • Plaster Skim
  • Allowing for installation of Downlights

Structural Flitch

An 8mm x 150mm steel section sandwiched between 2 x 150mm x 50mmstructural timbers. The design allows us to incorporate up to 4.5m bi-folds/openings unsupported with a calculated deflection allowing several people to walk all over the roof as and when required.

Support Matrix

95% of our installations are installed using a combination of our Enviro-pad and Enviro- Post matrix construction process.

The Foundations


Compressed Concrete Pad
450mm x 450mm
HDPE Membrane


Wooden Post
Concrete Pile
HDPE Membrane

Steel Pile

Attached to timber supports
75mm x 75mm x 5mm
Concrete Pile
HDPE Membrane


Cladding typically with 18mm x 145mm section in a selection of materials such as: Accoya – Cedar – Larch – Pine – Composite (plain and woodgrain) - Thermowood (Scandavian Redwood fitted as standard)
Doors & Windows
High quality UPVC in a wide choice of colours including anthracite grey and white interior finish. Single doors, Double doors, Sliding doors and Bi-Fold doors available. Full range of opening and fixed windows. Aluminium is also available.
Design Features

Such as roof side extensions, front canopy extensions, side wall extensions and decking requirements. Plus a full range of anthracite claddings.

External Decking and Steps
Decking is an optional extra. We typically use an 25mm x 145mm Thermowood.


Interior Walls

We can offer various finishes but by far the most popular is a 12.5mm plasterboard with a ‘wet plaster finish’ as standard. We can also finish the walls internally with a tongue and grooved cladding system or laminate finished panels.

Interior Ceiling

Again the most popular finish for our ceilings is a 12.5m plasterboard as above. We can also offer a tongue and grooved cladding system.

Interior Floor
A selection of laminate flooring or carpet tiles. Others available on request.
Electrical and Lighting
Our standard electrical pack can be extended to include extra lighting, sockets, heating and cooling options.
Services can be provided for toilets, bath and shower rooms and kitchens. All subject to services being available.

Lets start building your dream together today.

Stonehouse Garden Buildings are a family run company with over 60 years experience. Our ethos is to provide the customer with a bespoke journey in design, manufacture and service, culminating in a 10 year guarantee. We very much look forward to discussing your garden project with you.

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