Base Preparation

  • Building or shed base guide


    As with any structure, it is essential to provide a firm, level and square base, without which your shed or building will be unstable and will deteriorate rapidly. Preparations need not be too elaborate and we show the three recommended methods below. Whichever method you use, it is important that the end result is above all level, firm and square. If you are constructing the base for a building over 3.65m x 2.44m (12' x 8'), a sectional building or a corner unit, we recommend a purpose built concrete base. Please ask for a detailed base plan.

    1. Timber Bearers

    This is your easiest option: all that you need to do is level the overall area, removing all turf and other vegetable matter as well as any large rocks or stones. It is essential that this work is carried out before our arrival as our erectors are not able or equipped to undertake groundwork. It is important that timber bearers are tanalised for long life and they should incorporate a damp proof course (DPC). We are able to provide tanalised bearers with DPC for a small extra charge. We can advise the correct number and direction for bearers.

    2. Slab Base

    These are ideal for regular garden sheds or summerhouses, however they are not suitable for Sectional Buildings (unless the optional timber floor is specified) or corner units. They should be laid in complete rows at right angles to the standard floor joists which run from gable to gable (shaped end to shaped end). Rows may be up to 609mm. (2') apart, but you must have a row where there is a floor joint, if appropriate. On buildings over 2.44m x 1.83m (8'x6') and up to 3.65m.x 2.44m (12' x 8'), the floors will normally come in two equal sections, therefore you must have a row centrally. On buildings over 3.65m x 2.44m (12' x 8') or transverse (i.e. 2.44m x 3.65m (8' x 12') instead of 3.65m x 2.44m (12' x 8') please ask for a floor plan.

    3. Concrete Slab

    If you are putting down a new concrete base, it should be the same size as the building and it is vital that it is smooth and flat. If you are using an existing concrete slab or installing one that is larger than the building, we strongly recommend the additional use of timber bearers in order to raise the building off the ground to allow adequate rain water run off and to prevent "splash back".
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