Constructing a Timber Base

Installation Tips and Tricks

Constructing a Timber Base

Author : Log Cabin Expert
Date Issued : 30 September 2012

Not everyone wants the permanency of a concrete slab to use as a base for your log cabin. Another method that still provides a firm, level and stable environment is to produce a timber base, much the same as that employed under a deck.
You first might want to download a copy of the cabin installation guide, you will find this under the “Included” tab of the detail page.
On page 4 of the guide (some guides may vary) you will see a diagram of how the supplied base bearers should be laid out. In particular larger cabins and those with internal rooms, the position of the bearers is critical to ensure the flor boards are supported correctly. Here is an example :

Example cabin base bearer layout

Example cabin base bearer layout


In most cases, if you are planning to construct a timber base, we suggest you replicate this layout of the bearers using your own timbers.
What size planks should I use ?
The answer is quite simple, the narrower the plank, the more supports you are going to have to supply. We would aim to use a 150×47 joist and support this at a minimum of every 2.0m Sometimes this isn’t practical and a narrower joist may be required, perhaps a 100×47 – not a problem, just plac eht esupports no wider than 1.5m apart.
If you intend to put insulation boards under the flooring, ignore the above ! Construct your supporting frame with all the bearers perpendicular to the supplied bearer layout. Place the 50×50 supplied bearers then onto your base, you will then be able to place the insulation boards between the bearers once they have been cut to width.
Log Cabin Timber Base

Log Cabin Timber Base


By Martin Corby


What Base is Best For Your Log Cabin

Author : Log Cabin Expert
Date Issued : 30 September 2012

Log cabins with a construction using interlocking wood boards are best sited on a firm, level and stable base. This goes a long way to ensuring the walls built perfectly horizontal and vertical.

There are many ways to achieve these three key critieria, some more permanent than others but each with their own benefits.

So in answer to the question “What Base is Best For Your Log Cabin”, our opinion would be “Any – as long as the base can successfully meet the firm, level and stable requirements. The choice will then be arrived at depending on your budget, cabin permanency and weight.

  • Budget – Probably the cheapest option is to produce a timber base, much like found under a deck using joists spanning the length and width, supported at strategic points depending on the thickness of the timber used. The other end of the scale is a full concrete plinth – this involves excavating top soil, creating an enclosed area defining the size and shape of the plinth using shuttering  and then filling the void with concrete. Much more involved and much more expensive.
  • Cabin Permanency – Again using the two examples above, a timber base is much more easily removed than a concrete plinth. If the structure is only required for a temporary period, then the timber base makes more sense. If, on the other hand the longevity is more permanent, then the concrete option may well be considered.
  • Weight – The requirements of the cabin for the base to function correctly will be greatly affected by its weight. A  shed or smaller summer house will not make the demands on the base to stay firm and stable ans much as a larger cabin or multi roomed building. The base choice, therefore, should also give consideration to the structure to be built.

So, with the above in mind, let’s see what construction methods you could employ :

  • Timber Base
  • Railway Sleepers
  • Paving Slabs
  • Concrete Plinth

By Martin Corby


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