Let us build your Shed Base or Summerbuilding base
Base constructionThe addition of our base construction service is the real big news and it is something that should be considered by everyone. It is vital to the longevity of your new shed, summerhouse or home office that it sits on a good solid foundation. Without this the life of the building will be severely reduced and you may find the building listing to one side, the floor bouncy and rotting, doors and windows sticking and the roof leaking.
There are various methods of creating a suitable base ranging from concrete, through paving slabs to the latest innovation: the ProBase recycled interlocking tile system. For a super solid job though we recommend the timber sub frame method. First a hefty outer timber frame is constructed to the exact size of your new garden building using maintenance-free Tanalised timber. This frame is then spanned with a generous number of cross joists and then squared and levelled to suit your ground. It is completely self supporting and the vertical supports which are driven way down into the ground ensure that this system works perfectly even on a slope.
Installation of metal shedsMetal sheds make a truly cost-effective storage solution and are becoming increasingly popular in these increasingly price-conscious times of late. But they can be time-consuming and frustrating to assemble so an installation service is something well worth considering if you are looking to buy one. We have been offering this service for some time and, whilst it is definitely possible to assemble them yourself, having us come to your site and assemble your new metal storage shed. We can assemble buildings from our StoreChoice, GrandChoice, SafeStore and Trimetals ranges as well as others. Generally steel sheds will come without an integrated floor - being designed to sit directly on top of a concrete base - but, due to the other services offered, we can even construct a sturdy base and floor for your steel building to sit on.
How Do I Build A Suitable Base For My New Garden Shed?
As with any structure, it is essential to provide a firm, level and square base; without which, your building will become 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, firm and square. If you are constructing the base for a building over 12' x 8', a garage, a sectional building, a corner unit, a gazebo, or a building with no floor, we recommend a purpose-built concrete base. Please ask the relevant company for a detailed base plan when they contact you to arrange a suitable delivery date.
Please keep in mind that these base preparations must be concluded before the arrival of our fitter, as they often work alone, and are not able or equipped to undertake groundwork. If laying a concrete base, please also keep in mind the length of time it will take for the concrete to cure. If the fitter arrives and there is not a suitable base, then the building will be left on a self-assembly basis at full invoice price, or a surcharge will be incurred if they have to return another day.
How Do I Prepare For A Building With Bearers ?
PLANNING & PREPARATION
CONSTRUCTING THE BASE
Carefully mark out the exact size of the required shed base, using pegs and string. Check this is square by measuring the diagonals - if the base is square, the diagonal measurements will be equal. Mark 6" all around the outside of this area for the overall size of the 'dig'. remove the setting out strings, but leave the pegs in place for further use. remove all vegetation and clear the topsoil to the depth required.
Carefully level and compact the ground using a large spirit level - there must be no bumps or imperfections in the level of the base. Finally, please have on-site various pieces of packing in case the fitter needs to pack any of the bearers. These should include house bricks, roof slates or tiles, and paving slabs although this is not part of the erectors job so it is recommended that the bearers are correct to save any problems.
How Do I Build A Slabbed Base ?
PLANNING & PREPARATION
The base must be firm, level, square and designed to suit the floor size of the selected building. When the appropriate company contact you to arrange a delivery date, ask them for a base plan, and make sure that you stick rigidly to this - failure to do so may mean that the building cannot be installed without alterations.TOOLS REQUIRED
LAYING THE SLABS
Carefully level and compact the ground, laying a sand/cement dry-mix across the area on which the slabs will sit. Compact this dry-mix and ensure that it is level from front to back, as well as side to side - this will save you a lot of time later.
Starting in one corner, bed the first slab into position, carefully levelling in all directions using a large spirit level. It is important that you use a large spirit level as this will give a more accurate reading. Take your time here - it is vital that the first slab is absolutely correct - if it's not, then the whole base will be out of true.
If one of the slabs is too high, and needs realigning, simply lift it and remove a little sand at a time until you arrive at the correct level. Alternatively, gently tap the slab on the top edge of the offending corner with a rubber mallet (or lay a piece of timber on the corner and strike gently with a club hammer) If a slab is too low, lift it and put more dry-mix beneath it until it rises to the correct level.
Take your time here - it is vital that the first slab is absolutely correct - if it's not, then the whole base will be out of true. When you are happy that the first slab is 100%, lay the second slab in the row tight up against it, following the same guidelines as you did with the first. Ensure that the second slab is 100% in-line with the first by laying the spirit level across the join. When slab number two is in position, continue along the row until you get to the outside edge of the base.
The next step is to add the remaining rows - in their correct positions. This is basically a re-run of the first row, but it is again vital to ensure that this, and each subsequent, row is perfectly in line with the original. Again this is achieved by laying a large spirit level across the gaps. The slabs must be perfectly level across the whole site in order to spread the load equally and to avoid any subsidence.
How Do I Build A Concrete Base ?
When designing the base, it is vital that you take into account whether or not the building has a floor as this will influence the size and design of the base. If it does have a floor, you should add 1" (25mm) to the above dimensions. If it does not have a floor, we will guide you accordingly - please do not use these instructions. We will be happy to provide a detailed base plan for your individual needs in this instance.
Concrete is a mixture of 'all-in' ballast, Portland cement and water. For this type of base, they are mixed to the ratio of:
Quantities for other size bases may be worked out using these figures. The golden rule is to order on the generous size when buying materials. Excavations can seldom be measured accurately.
Quantities for other size bases may be worked out using these figures.TOOLS REQUIRED
Carefully mark out the exact size of the required shed base, using pegs and string. Check this is square by measuring the diagonals - if the base is square, the diagonal measurements will be equal. Mark 6" all around the outside of this area for the overall size of the 'dig'. remove the setting out strings, but leave the pegs in place for further use. remove all vegetation and clear the topsoil to the depth required. carefully level and compact the ground.
For ordinary garden sheds, a thickness of 3" (75mm) is sufficient in most situations. on soft clay, or on larger buildings, increase the thickness to 4" (100mm) laid on 2" (50mm) of finely broken and compacted hard-core if required. half the depth of the base (approx.) should be above ground level.
Replace the setting out strings onto the pegs and check the original measurements. Check the markings are still square by checking the diagonals. These strings are used for positioning the concrete form work. This is made from 2" (50mm) thick timber and should be as wide as the depth of the concrete slab.
Use a tape measure, spirit-level and try-square to set out the form work accurately. This is nailed onto pegs driven into the ground. These pegs should be sited on the outside of the form work in each corner and every 2' (600mm) It is very important that the pegs do not protrude above the top of the form work as this will make the levelling off of the concrete very difficult. Ensure the top of the form work is carefully checked and is level all around (use a long spirit level)
MIXING THE CONCRETE
Add water gradually to the mix until the whole pile is uniform in colour and sufficiently workable to use. Do not make the mix too wet - this weakens the concrete. Note how much water has been used and use the same quantity for each mix. Hire a cement mixer for making large quantities of concrete.
LAYING THE CONCRETE
Use the tamping beam with a chopping and sawing motion across the slab; working from one end to the other. This will level off the concrete, leaving it flush with the top of the form work. The concrete should be tamped flat as it is poured. After tamping the concrete should be smoothed out with either a wooden or a plastic float - this allows the batons of the floor to sit evenly.
Concrete must not be permitted to dry out too quickly or be damaged by frost whilst wet. Cover with plastic sheeting until the concrete is hard and spray with water for several days to allow it to dry out slowly.
When base is ready, remove the form work and tidy around the base, ready for delivery of your new building. Fill the 6" (150mm) around the edge of your new base with pea shingle to prevent 'splash-back' as rain drips to floor.GUIDE INFORMATION