B&Q Paving Slabs £1: Cheap Patio Options and Laying Guide

Paving slabs range from pocket change to premium stone, but B&Q’s cheapest concrete slabs start under £2 each — however, no slab for exactly £1 is currently available. This guide covers the cheapest choices, proper base preparation, and common mistakes to keep your budget patio solid for years.

Material types: Concrete, natural stone, porcelain ·
Standard slab size: 450 mm and 600 mm ·
Anti-slip option: Available on concrete effect slabs

Before diving into details, here are the essential facts.

What is the cheapest type of paving slab?

Concrete slabs: the budget-friendly option

• Concrete paving slabs from B&Q are among the cheapest, with prices starting under £2 per slab and standard sizes 450 mm and 600 mm. Other suppliers like Landscaping Supplies Direct also offer budget paving options (Landscaping Supplies Direct).

Comparing concrete, stone, and porcelain slabs

Three slab types, one pattern: concrete is cheapest upfront, natural stone sits mid-range, and porcelain commands the highest price.

Four items, one pattern: you pay more for natural aesthetics and longevity. The trade-off: budget concrete saves money now but may need replacing sooner.

Can you lay paving slabs directly onto soil?

Why laying on soil is not recommended

• Laying slabs directly on soil leads to uneven settling over time, creating trip hazards and cracked slabs (B&Q buying guide).
• A compacted sub-base of hardcore or gravel is essential for a stable patio that lasts.

Proper base preparation for garden paving

• Excavate to at least 150 mm depth for pedestrian areas.
• Add 100 mm of hardcore or MOT Type 1 and compact thoroughly.
• Top with 30–50 mm of sharp sand, screeded to the correct fall (approx 1:80 for water runoff) (Ideal Home).

Proper base preparation is non-negotiable for a durable patio.

What should I put under paving slabs?

The role of gravel and sharp sand

• A layer of gravel or hardcore provides drainage and stability, preventing water pooling under slabs.
• Sharp sand (not building sand) is used as a leveling layer because it compacts well and doesn’t hold water.

Using a weed membrane and MOT Type 1

• MOT Type 1 is a graded aggregate (0–32 mm) that compacts into a firm sub-base.
• A weed membrane laid between sub-base and sand prevents weed growth without chemicals.

The pattern: every layer has a specific job. Skip one and you risk movement, weeds, or water damage. For a cheap install, cheap sub-base is a false economy.

Are B&Q paving slabs slip-resistant?

Concrete effect anti-slip slabs from B&Q

• B&Q sells weatherproof concrete effect anti-slip square paving slabs, designed for patios and walkways (B&Q paving ideas).
• Slip resistance is achieved through a textured surface finish — check product labels for R11/R12 ratings.

How to test slip resistance

• Pour water on the slab and walk over it in flat shoes. If your foot slides easily, consider a different finish.
• For high-traffic or wet areas, anti-slip concrete slabs are a safe choice without a big price jump.

Testing slip resistance before buying can prevent accidents.

What are the common mistakes when laying slabs?

Inadequate base preparation

• Not excavating deep enough or using the wrong sub-base material is the most frequent error (MoneySavingExpert forum (community advice, tier 3 source)).
• Some DIYers reportedly lay slabs directly on soil — a mistake that leads to sinking within a year.

Not using a level

• Without a spirit level, slabs end up uneven, which not only looks bad but creates trip hazards.
• Use a 1.2 m level and check in both directions on every slab.

Ignoring drainage

• Patios must slope away from the house (minimum 1:80 fall). Standing water accelerates slab deterioration and encourages moss.
• Plan your gradient before laying the first slab.

What this means: almost all budget-patio horror stories trace back to the same root — rushing the base. Spend 80% of your time on preparation and 20% on laying, and your cheap slabs will still look good in five years.

Step-by-step guide to laying cheap B&Q paving slabs

1. Plan and measure – Mark out your patio area with pegs and string. Calculate the number of slabs needed (add 10% for cuts).
2. Excavate – Dig to 150 mm depth for pedestrian patios. Remove turf and topsoil.
3. Add sub-base – Spread 100 mm of MOT Type 1 hardcore. Compact with a plate compactor or hand tamper (B&Q buying guide).
4. Lay weed membrane – Overlap edges by 100 mm to stop weed breakthrough.
5. Screed sharp sand – Spread and level a 30–50 mm layer of sharp sand. Use two dowel rods as depth guides.
6. Lay slabs – Start at a straight edge (e.g., house wall). Place each slab onto the sand bed, tap down with a rubber mallet, and check level. Maintain a 1:80 slope away from buildings.
7. Fill joints – Brush kiln-dried sand into the gaps. Compact and brush again.
8. Cure and seal (optional) – Leave for 24 hours before heavy foot traffic. Sealing concrete slabs helps reduce staining.

Pros and cons of cheap B&Q concrete paving slabs

What we know and what’s still uncertain

Confirmed facts — sources are clear:

• Concrete slabs are the cheapest type at B&Q (B&Q official product range).
• A gravel or hardcore sub-base prevents slab movement (B&Q buying guide).
• B&Q stocks anti-slip concrete effect slabs (B&Q paving ideas).

What remains unclear:

• Whether any B&Q slab costs exactly £1 — no evidence found in current listings.
• How long budget concrete slabs last compared to premium options — independent long-term tests are scarce.

Understanding these certainties and uncertainties helps set realistic expectations.

“Good quality paving like Indian sandstone is available at the budget end, starting from around £25/m².”

Steven Walley, Managing Director of London Stone (Ideal Home (gardening advice site))

“Outdoor tiles are a low-maintenance, sleek alternative to traditional slabs and can be found at B&Q and Wickes.”

Trevor, Marshalls Plc (Ideal Home)

The budget-patio buyer’s choice is clear: concrete slabs from B&Q deliver the lowest entry cost, but the real money is saved in proper base preparation, not skimping on the sub-base. For UK DIY gardeners, the implication is simple — spend £30 on gravel and sand, and your £2 slabs will last a decade. Skip the base, and you’ll be buying replacement slabs within two summers.

Related reading: Paving buying guide · Paving ideas

When laying budget B&Q paving slabs, using the right sharp sand is essential, and you can check sharp sand near me prices for local deals.

Frequently asked questions