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'Modd Base' Steel Base System

Our Fantastic steel base system allows a fast and clean installation of garden room or extension foundation, in a fraction of the time of a concrete slab. The reduction of concrete is far kinder to the environment, with less concrete used and transported.The base is designed to enable the base to travel and be installed in smaller modules if need for difficult access. Fully adjustable for uneven surfaces and red oxide painted, the steel base system is fast and effective alternative to slab concrete bases. Our Base System is the quick and effective alternative to wood frames and concrete slabs.

The need for a solid base is essential for a room in frequent use. Our Steel base system allows a Garden room to be sited in a matter of hours. Our steel base is bolted and welded together for easy carriage and manual handling. The steel frame forms a solid base which sits on concrete piles dug into the ground. The adjustable feet allow the base to be easily levelled . Using self tapping screws the sip panels are screwed to the base over a waterproof membrane. Because of the limited use of rapid set concrete the base can even be installed in the rain.

Steel Base Foundation System

  • Steel Box Section with 3mm wall thickness
  • Fully Welded corners and cross members
  • Modular sections to fit all garden rooms
  • Adjustable Feet
  • Red Oxide Coating for rust protection
Ask for a Quote, the outdoorlivingroom bases are all modular and made to measure.Bases can be extended to accommodate decking areas.

We can provide a Plinth system which has pre made concrete feet , that bear the weight of the Metal or wooden frame.

The Swift Plinth system uses a polymer grid which is filled with pea gravel. The Base plate is then placed on and followed with the truncated pyramid .

Depending on the type of frame the adjustable fixing plate is mounted.


We use 3mm walled steel tubing in 3x2 and 4x2 sections. Corners and mid sections are fully welded, not just tacked. adjustable 25mm legs and feet are welded at key structural points. Modular construction means minimal or no welding on site. with manageable sections able to pass through door ways. steel base positioning