Question 1

How to build a shed base on uneven ground?

Accepted Answer

Building a shed base on uneven ground can be as easy as digging out a sub-base and checking that it’s level. You can dig down until the soil is light brown and rather compact, then work out where the ground is uneven and move soil around to compensate. Add a weed-blocking membrane down then put plastic grids in to act as your shed base or continue to make a sub-base for paving slabs or concrete. However, you could also build a timber shed base on uneven ground using concrete blocks to level it out. Mark out the area and dig the top layer of soil, trying to get the ground as flat as possible. Build a timber frame to size. Measure out 4 rows of 3 blocks to create good weight distribution and lay in place. Underneath each block, dig around 50mm wider than the blocks and about 150mm deep. Fill the hole with pea gravel until it’s flat. Place timber planks along the rows of blocks and see how level it is. Add or remove blocks where necessary. If it’s only a small difference, use shingle underneath the timber until it’s level. Nail your timber shed base to the timber planks to create a sturdy base for your shed. If you’ve got any questions about building a shed base on uneven ground, it’s best leaving it to the pros. Get in touch with a range of builders who will be able to offer you a quote.

Question 2

How to build a shed?

Accepted Answer

A garden shed is a great option to add extra storage space in your garden. Lock away your lawnmower, tools, outdoor toys and furniture so it doesn’t get weather damaged or stolen. But how do you build a shed? We’ll go through a brief guide on building a shed using a flat packed one. Plan your shed base You must have a sturdy base for your shed, otherwise the frame won’t stand properly and could stop the door from opening. Decide whether you’re going to have: A concrete base laid on hardcore Concrete slabs on sharp sand Treated wood beams on hardcore or shingle An interlocking plastic system All bases should be laid on firm, level ground as far as possible. Treat wood with preservative To help your shed last as long as possible, you should coat all the wooden parts with timber preservative before you put it together. Put the shed floor together Some will need more assembly than others, but you need to make sure that the floor panel is attached to the joists; follow the manufacturer’s instructions for the correct spacing. Put up the shed walls Mark the centre point of each wall on its bottom edge, then do the same for the shed floor so you can line them up together. Stand the gable end on the base and line it up. Check that it’s vertical with a spirit level – you might need someone to support the panel while you do this. Use a temporary holding batten to keep it in place. Fix a side panel to the gable end panel with countersunk screws, then add the second side panel in the same way. Don’t attach the panels to the floor until you’ve fitted your shed roof. Fit the roof If the shed comes with a support bar, put this in position before you put the roof panels in. Nail the roof panels in place, ensuring there’s a parallel and equal overlap at each end. Roll out some roofing felt from front to back, leaving a 50mm overlap at each side. Secure it with clout-headed felt tacks at 100mm intervals. Apply mastic sealant to the outside corners, then fix each corner trim with 30mm nails. Add the fascias and finials, predrilling 2mm holes to avoid splitting the wood. Nail them through the felt into the shed using 40mm nails. Add the shed windows Slide each windowsill into the tongue and groove cut out, then put the window cover strip in position, fixing it to the vertical framing. From inside the shed, put the glazing sheets into the window rebates, making sure the bottom edge of the glazing sheets sit on the outside of the sill. Fix the window beading on the top and sides with 25mm nails. Fix the walls to the floor Before you do anything, make sure you check that the centre marks on the walls line up with the marks on the shed floor. Then fix the wall panels to the floor with 50mm screws, aligning them with the joists. And that’s it! But if you’re not confident in building a shed yourself, there are plenty of professionals available who will be happy to help.

Question 3

How to felt a shed roof?

Accepted Answer

Whether you want to felt a new shed roof or you’re re-felting your existing shed roof, it’s simple when you know how. Read our quick guide to see how easy it is. Remove any existing fascia boards Remove the fascia boards and the old felt if you’re re-felting. Measure the shed roof Measure the roof, taking into account that you should leave around 50mm for overlaps at the eaves and 75mm at the gable ends. You’ll probably need 3 pieces of felt, but some smaller sheds only need 2. Apply felt to the roof Once you’ve cut the felt to size, apply the each piece to the roof, pulling it tight. Then nail along the length of the roof at 100mm intervals. For nails at the bottom edge, they can be wider – around 300mm. If you’re adding a piece of felt in the middle of the shed along the apex, fix it using adhesive, then nail it at the lower edge at 50mm intervals. Tidy up the overhangs Fold down the felt at each overhang and nail it securely. Cut a slit in the overhang at the apex using a pen knife, then fold that down and nail at 100mm intervals along the gable. If you like, you can add fascia boards to keep the shed looking neat. Use wood nails to secure them and then trim away any excess felt. That’s it. It sounds scary, but it won’t take you long to felt your shed roof as long as you follow instructions carefully.

Question 4

How to build a shed base?

Accepted Answer

You need a firm, level base for your shed to ensure that it stays structurally sound – without one, doors will sag, walls will lean and it won’t last you as long. But how do you build a shed base and what should you make it from? Timber shed bases A timber shed base is made from pressure-treated timber and has metal spikes that you hammer into the ground to keep it in place. You can often buy them with your shed installation kit, but they also come separately, often in 6x4 or 7x5 sizes. To build a timber shed base, you’ll drill holes then fit screws in the timber until the entire frame is built. Remember to check it’s square, then fix L-shaped feet to the inside of the frame. If you’re putting your shed on a hard surface like concrete, this is all you need to do. If you’re putting the base on soft ground, hammer in spikes at each corner until they’re level with the top of the base, then secure the spikes to the base with screws. Then you can position the shed floor onto the base. How to build a plastic shed base A plastic shed base is a simple and quick way to build a shed base. You can lay it on level concrete or paving slabs, but adding sharp sand on top will help keep it more secure. They come in a kit containing plastic grids. To build your plastic base, first measure out the site and hammer a peg into each corner and tie with string or builder’s line. Make it slightly larger than the shed base to help with drainage. Then cut into the lawn and remove the turf, making sure it’s level. Lay down a membrane sheet and weigh it down if it’s windy. Then lay out the number of plastic grids you need, then remove the locking pins and clip all the grids together. Once they’re all connected, put the locking pins back in the centre of the grids. Put your shed floor on top and you’re done! Concrete or paved shed bases For a concrete base or a shed base made from paving slabs, you’ll need to dig a sub-base. For concrete bases, you’ll need to dig down 150mm so you can add 75mm of compact hardcore under 75mm of concrete. For paved shed bases, you’ll want it to be about 120mm deep for 50mm of compact hardcore and the paving slabs. How to build a shed base out of paving slabs Mix sand and cement together to make mortar or use a pre-mixed one Use a trowel to lay mortar for 1 slab at a time on the sub-base and lift a damp-sided slab onto the mortar, using a piece of timber and club hammer to tap the slab into position carefully. Continue to lay the first row of slabs Make equally-sized spacers in all the joints in the slabs to ensure they’re the same size, checking it’s level as you go along Next lay slabs along the two adjacent outer edges, filling in the central area row by row Leave the mortar to set according to the instructions or for at least 48 hours before filling in the joints with mortar or paving grout Building a shed base from concrete Create a wooden frame around your shed base area (also called formwork) to stop the concrete from spreading Mix pre-mixed concrete with water or use 1 part cement to 5 parts ballast Wet the sub-base using a watering can with a rose on the end Pour the concrete onto the framed base starting in one corner Push the blade of a shovel up and down in the edges of the concrete to get rid of air bubbles Use a rake to spread the concrete, leaving it around 18mm higher than the top of the frame. Work in sections of around 1-1.m2 Compact the concrete using a straight piece of timber that’s longer than the width of the base. Move the timber along the site, hitting it along at about half of its thickness at a time until the surface is evenly ridged Remove excess concrete and level the surface by sliding the timber back and forwards from the edge that you started. Fill in any depressions and repeat until even Run an edging trowel along the frame to round off exposed edges of the concrete and prevent chipping Cover the concrete with a plastic sheet raised on wooden supports to allow slow drying. Weigh it down with bricks Once the concrete is set, you can install your shed and remove the wooden frame with a crowbar Don’t fancy having a go at building a shed base yourself? Get a range of quotes from a professional and see how much it will cost.

Avg. price low	Avg. price low £1,817
Avg. price	Avg. price £2,784
Avg. price high	Avg. price high £3,730

	Labour cost	£420
	Material cost	£150
	Waste removal	£30

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