Garden Turf: The Complete UK Guide to Lawn Reinstatement After Construction

Two months after your builder has rolled out the turf, the lawn is yellowing at the edges, one corner has dipped by 30mm, and a patch near the patio is dead. Lift a corner and you'll almost certainly find pale, dry soil that hasn't been watered enough, or worse, compacted subsoil that the builder topsoiled thinly and turfed straight onto. Garden turf is one of the cheapest materials on an extension project, but it's also the most often killed in the first fortnight. The turf itself might cost you £60 for a 30m² lawn, but a failed reinstatement means lifting, stripping, subsoil ripping, importing fresh topsoil, and re-turfing the whole area. The difference between a lawn that establishes and a lawn that fails is almost never the turf grade. It's what's underneath and what happens in the first two weeks after it's laid.

What turf is and what it's for

Turf is living grass, sold in rolls, harvested from a commercial grower's field within the last 24 to 48 hours. Each roll is a strip of established grass held together by its own root mat and the thin layer of growing medium underneath it. In the UK the standard roll size is approximately one square metre: 610mm wide by 1640mm long, around 12mm thick, weighing 15 to 20 kilograms when fresh. That last figure matters for moving them around. A 30m² lawn means 30 rolls at roughly 18kg each, so more than 500kg of material shifting from pallet to lawn within a few hours.

The grass in a turf roll is typically a blend rather than a single species. Most domestic turf uses perennial ryegrass (Lolium perenne) for hardwearing cover combined with smaller-leaf fescues (Festuca rubra and others) for finer appearance. Specialist grades swap the blend for shade-tolerant fescues, hardwearing ryegrass monocultures, or slow-growth ornamental fescues depending on the use case.

Turf solves one specific problem: you want a usable lawn immediately. Grass seed, the obvious alternative, costs about 8 to 16 times less per m² but takes 6 to 12 weeks to produce a usable surface and 6 to 12 months to fully establish. On a post-extension reinstatement, turf is almost always the right choice because the homeowner has already lived with a building site for months and wants their garden back. Seed makes sense for larger areas, tighter budgets, or laying outside the turfing season.

Two standards apply to post-construction turf laying:

• NHBC Standards Chapter 10.2.9 (Garden Areas) sets the rules builders must follow when reinstating lawn on warranted new-build and extension work. A minimum 100mm of suitable topsoil over the area to be turfed. Subsoil decompaction before topsoil goes down. Construction debris removed. No subsoil placed over topsoil.
• BS 3882:2015 (Specification for topsoil) governs the growing medium underneath the turf. Your turf will only perform as well as the topsoil it sits on. Turf laid on uncertified clay-heavy material fails regardless of how good the grass itself is.

You cannot get turf right if you get topsoil wrong. The topsoil guide covers the substrate in depth. Work through that first if you're reinstating from bare subsoil.

Turf grades and what they mean

UK turf suppliers sell under brand names (Medallion, Jubilee, Greenscape, County Shade, and so on) but the useful distinction for a homeowner is the grade, not the brand. Five grades cover almost every domestic scenario.

Most extension reinstatement lands on the medium ryegrass-fescue blend at around £3 to £5 per m² for material, £15 per m² for supply and lay. A 30m² reinstatement typically costs £450 supplied and laid by a landscaper using that grade. DIY with purchased turf and your own labour runs roughly £90 to £150 in material plus a full weekend.

One practical point on supplier choice. The larger growers (Rolawn, County Turf, Q Lawns, Harrowden) cut to order and deliver named-day, usually within 24 hours of lift. Turf cut yesterday and laid today is at its best. Turf that has been sitting rolled on a pallet for 48+ hours starts yellowing inside the roll and may not recover fully. Buy with a grower that cuts to your delivery date, not one that holds stock.

A note on plastic mesh netting

Some turf suppliers reinforce their rolls with thin plastic mesh to keep the root mat intact during lifting and transport. The mesh degrades into microplastics rather than biodegrading, causes problems for mowers and aerators years later, and has been documented entangling hedgehogs and other wildlife. It's also a selling point for growers because netted turf can be lifted at a younger root stage, reducing field time.

Ask any supplier directly before ordering whether their turf uses plastic netting. Reputable growers are transparent about it; Harrowden explicitly sell netting-free turf as a product feature. The question to put in an email or over the phone: "Is this turf reinforced with plastic mesh, and if so, is the mesh biodegradable or does it remain in the root zone permanently?" If the answer is the latter or the supplier won't say, buy elsewhere. This is one of those details that doesn't appear in any product listing but matters for the next decade of lawn maintenance.

When to lay turf: the laying window

Turf can technically be laid all year round except on frozen ground, but the establishment outcome varies hugely by month. The optimum soil temperature for root development is 10 to 18°C, which in the UK means the best months are March, April, September, and October.

Period	Viability	Notes
March to mid-May	Best	Soil warming, steady rainfall, minimal drought stress
Late May to early June	Good	Water carefully. Avoid laying in a forecast heatwave
Mid-June to August	Workable but difficult	Daily watering essential; horticultural fleece may be needed in extreme heat. The worst time of year on paper, though possible with commitment
September to October	Best	Soil still warm, autumn rains support establishment, roots develop before winter dormancy
November to February	Possible if soil above 7°C	Not frozen, not waterlogged. Root development is slow; first mow pushed back accordingly

Post-extension builds often finish in late autumn or early spring, which by happy accident lines up with the two optimum windows. If the build finishes in July and you want the lawn back, you can turf, but you're committing to twice-daily watering for the first fortnight in dry weather, and ideally a sprinkler on a timer. Alternatively wait until September and ask your landscaper to seed the area temporarily with rapid-germination rye mix.

How to work with turf

Turf is a living product. Once lifted, the clock is ticking. In spring and summer, rolls should be laid the day they arrive: an overnight wait in high heat will turn the centre of each roll yellow. In autumn and winter, up to 24 hours is acceptable if the rolls are kept in a cool, shaded spot. If you cannot lay within 24 hours in summer or 48 hours in autumn, unroll the turf on an unused hard surface and water it lightly rather than leaving it rolled.

Before delivery, the substrate needs to be ready. Work through this checklist in the days before the rolls arrive:

• Subsoil de-compacted to at least 300mm depth per NHBC Standards 10.2.9. Rotavated, ripped, or forked through. Non-negotiable on any area where construction plant has tracked.
• Topsoil placed at 100 to 150mm depth. BS3882:2015 Multipurpose grade, screened to 10mm or 20mm. See the topsoil guide for specification detail.
• Surface raked to a fine tilth. No lumps larger than 20mm. The surface should feel firm underfoot but not compacted.
• Heel-firmed across the whole area. Walk the surface with short steps on your heels, weight on the back foot, to press out air pockets. A light pass with a garden roller (minimum setting) achieves the same result faster.
• Pre-turf fertiliser applied. An NPK blend such as 7:7:7 or a specialist pre-turf formulation (6:9:6 is common) applied at 30 to 50 grams per m² one week before laying. The high-phosphorus end of the range specifically supports root establishment.
• Soil watered to 75mm depth two days before delivery. Not sodden, but moist enough that the roots make contact with damp soil rather than hitting a dry layer.

Day of laying: start along a straight edge (usually the patio or a path) and work away from it so you're always walking on unlaid topsoil, not on the freshly laid turf. Stagger the joints in a brick-bond pattern, never letting corners meet in a cross. Push each roll tight against its neighbour, no gaps. Cut around curves, paths, and drain covers with a sharp long-bladed knife; a standard Stanley knife will do but a landscaper's turf knife is easier for long curves. Use a scaffolding board laid across the turf to distribute your weight when working on laid sections: walking directly on fresh turf compresses the soil below and creates low spots.

After laying, water immediately. A heavy soak to the depth of the root mat, not just a surface sprinkle. Lift a corner of one roll 15 minutes later: the soil underneath should feel wet to the touch, not just damp.

Click to enlarge

First-fortnight care: where lawns actually get killed

Most turf failures trace to one thing: not enough water in the first two weeks. New turf has a paper-thin root system that cannot pull moisture up from below. It relies entirely on the water that reaches the soil through or directly onto the root mat. Miss two warm days and the edges of each roll start to yellow, the curl lifts off the substrate, and by day ten the root connection is compromised.

The first-fortnight care protocol:

1. Days 1 to 14: daily watering. Apply enough water to soak the root mat and the top 30 to 50mm of topsoil. In cool, overcast spring weather, a 15-minute soak with an oscillating sprinkler is typically enough. In warm weather, twice-daily watering for the first week. Lift a corner of one roll at random each day to check the soil underneath is wet, not just damp. Yellow edges are the first warning sign of underwatering: check the edges especially.
2. Days 15 to 28: tapering. Reduce to every second day, then every third day. The turf should be rooting in by this point. Test by gently tugging a corner of a roll; if it resists, roots are establishing. If it lifts cleanly, keep watering daily for another week.
3. No foot traffic for 4 to 6 weeks. None. Not to cross to the garden building, not to put the washing out. The roots are fragile for at least a month. If access is essential, use scaffolding boards to distribute weight.
4. First mow at 10 to 14 days, cut height 50mm. Only when the turf resists a gentle tug. Use a sharp rotary mower, never a cylinder mower for the first cut, and remove no more than a third of the grass height. Cutting too low at the first mow ("scalping") damages the grass crown and sets back establishment by weeks.
5. Second and subsequent mows: weekly, gradually lowering the cut height by 5mm per mow until you reach 25 to 30mm for standard lawns or 40mm for hardwearing grades.

After 6 weeks, the turf is established. Fertilise with a standard lawn feed in spring or autumn, treat weeds as they appear, and the lawn will look like it's been there for years within a season. If patches are thin or slow, overseed with the same species blend in autumn and water in.

How much do you need

Turf quantity is a simple area calculation plus a waste allowance. The formula:

Area (m²) + 5% to 10% waste = rolls to order

The waste allowance covers cutting around curves, paths, drain covers, and awkward corners. Use 5% for a simple rectangle and 10% for any shape with curves, a soakaway, or a patio with a complex edge. Extension gardens often have irregular shapes because of the new patio footprint, soil vent pipes, and drainage runs, so default to 10% unless the area is a clean rectangle.

Worked example: 30m² extension reinstatement

Typical post-extension scenario: a 30m² area of lawn damaged by tracking and material storage, with the new patio running along one edge and a soakaway inspection cover in the centre.

• Base area: 30m²
• Plus 10% for the irregular shape: 30 × 1.10 = 33m²
• At one square metre per roll: 33 rolls to order
• Material cost at £4.50/m² (mid-grade): 33 × £4.50 = £148.50
• Or supplied and laid at £15/m²: 33 × £15 = £495

For awkward shapes or long thin runs, order one or two rolls above the calculated total. Fresh turf kept on a pallet for 48 hours is effectively scrap, so you cannot use leftover rolls next week, but a spare on the day gives you room to cut around a misplaced cable or redo a section that lifted.

Cost and where to buy

Turf pricing sits in a narrow band across the UK market because the product is standardised, delivery is a significant cost, and the growers are national.

Material only, direct with a grower: £2 to £7 per m² covers almost every domestic grade. Delivery is typically £30 to £70 flat rate, so small orders cost disproportionately more. Named brands at the specialist end of the market (Rolawn Medallion, County Shade) run £4 to £9 per m² depending on order size. Economy grades (County Turf Greenscape, local farm turf) sit at £1.87 to £3 per m².

Wickes Rolawn Medallion runs on a quantity-tiered structure: 20 rolls at £9 per m², 30 rolls at £6.90 per m², 40+ rolls at £6.60 per m². For a 30m² extension reinstatement at 33 rolls (10% waste margin), you fall into the 40+ tier at £6.60 per m² (33 × £6.60 = £217.80) or the 30-roll tier at £6.90 per m² (33 × £6.90 = £227.70), so material cost lands at roughly £218 to £228. Click-and-collect is usually not available for turf because of the weight and perishability.

Rolawn direct has a similar tiered structure of £5.89 to £12.29 per m² depending on volume. 100+ rolls gets the bottom of the range; single-roll top-ups hit the top. For a 30m² lawn, ordering through Rolawn direct at around £6.50 to £7 per m² plus delivery is typical.

County Turf Greenscape at £1.87 per m² is the lowest named-brand price for 2026. Delivery is postcode-dependent and their minimum order is 10m². Maximum order 180m² without a direct sales conversation.

Supply and lay by a landscaper: £10 to £25 per m², with £15 per m² as the most-cited average. This rate covers material, delivery, substrate firming, laying, and initial watering. Post-construction sites typically fall at the upper end (£18 to £22 per m²) because debris removal and subsoil decompaction add time. Levelling on top of basic laying adds a further £20 per m² on badly churned ground.

Labour rate: £150 to £200 per day for a turf layer working in England outside London, with London commanding around a 20% premium. A typical landscaper lays 30 to 35m² per day including substrate firming, so a 30m² job is one long day for one person or half a day for two. Expect to see one day of labour on the quote plus preparation time (half a day to a day for a post-construction site).

Small DIY bags at Wickes, B&Q, Homebase are not a thing. Turf is sold in rolls only, not in small retail packs.

Getting three quotes

Turf quotes vary less than most trades because the material cost is transparent and the labour is straightforward. But they still vary. Three typical quote patterns for a 30m² reinstatement on a post-extension site:

• Generic garden maintenance gardener: £600 to £800. Will underestimate substrate preparation, often skimping on decompaction.
• Specialist landscaper: £700 to £1,000. Includes BS3882 topsoil import, decompaction, levelling, pre-turf fertiliser, named-grade turf, first watering.
• Builder offering "turf included" in their main contract: £200 to £400 as a line item. Almost always means a cheap economy roll on minimal topsoil with no decompaction. This is where most extension lawn failures originate.

For anything beyond a simple recover on existing good-quality ground, the middle option is the one that lasts.

Turf vs seed: when each makes sense

Seed is the cheaper alternative to turf and the honest comparison is worth making because the default assumption (that turf is always better) is wrong for some scenarios.

Factor	Turf	Seed
Material cost per m²	£2 to £7	£0.40 to £0.60
Usable lawn	3 to 6 weeks	6 to 12 weeks
Full establishment	6 months	6 to 12 months
Laying window	March to October (plus mild winter)	March to May, September to early October only
Root system long-term	Transplant shock initially, shallower for first season	Deeper, stronger root system once established
Wear tolerance first year	Limited	Very limited
Effort	Intensive 2-day job	Scatter and water, then wait
Weed competition	Immediate cover outcompetes most weeds	Seedlings compete with construction-site weed seed bank

Turf wins for: immediate coverage, year-round laying (within reason), post-construction sites where the weed seed bank is large, small areas, homeowner impatience after a long build.

Seed wins for: large areas (over 100m²) on tight budget, spring or autumn laying windows, situations where you have 3 to 6 months of patience, flat ground without heavy shade.

Where you'll need this

• Garden reinstatement after construction - turf laying is typically the final snagging-stage external works task, and often the first item to fail within 6 months if substrate preparation was inadequate
• Foundations and footings - the groundwork phase is when the decision about topsoil stockpiling (and therefore the quality of the substrate the turf will eventually sit on) is made

Turf reinstatement is the final external works material on any extension, loft conversion, garage conversion, or garden building project. The NHBC 10.2.9 minimum topsoil depth, the laying window, and the first-fortnight care protocol apply equally across project types. The scope of the reinstatement varies (a loft conversion damages less garden than a rear extension) but the specification does not.

Common mistakes

Laying on compacted subsoil with minimal topsoil. The top cause of failure on post-construction sites. Builders tip 30 to 40mm of bagged topsoil over compacted clay and roll turf onto it as a final-day job. The turf looks fine for 4 to 6 weeks, then yellows, waterlogs, and sinks. Verify the topsoil depth with a spade before the rolls arrive: 100mm minimum, 150mm on clay. See the topsoil guide for the full substrate spec.

Not watering enough in the first fortnight. Easily the most documented DIY failure, appearing in forum threads at DIYnot, MSE, Garden Ninja, and Gardeners Corner in almost identical terms each time. The edges yellow first, the centre holds on for another week, then patches die. Daily watering for 14 days is the fix. Set a sprinkler on a timer if willpower is unreliable.

Laying in a heatwave or frost. June to August laying is workable but punishing on the homeowner. Two days of 28°C temperatures with no watering and the lawn is dead. Late-October laying when the forecast shows frost overnight kills the crowns. Check the 10-day forecast before booking delivery and push back if conditions are extreme.

Gaps between rolls. Leaving a 5 to 10mm gap between adjacent rolls because "the grass will grow across" is a common mistake. Gaps dry out, weeds colonise, and the seam never closes. Push each roll hard against its neighbour during laying. If a gap opens up while you work, brush a thin layer of sieved topsoil into it and water through.

Walking on laid turf before it has rooted. The compaction of foot traffic in the first 4 weeks creates permanent low spots and damages the fragile root system. Use scaffolding boards to distribute your weight if you must cross the laid area. Keep children, dogs, and builders off completely for 6 weeks if you can.

Accepting turf that has been sitting on a pallet for 72+ hours. A delivery driver who arrives with rolls that are already yellow at the edges is offering you a failure. Check the rolls when they arrive: they should be a consistent green through the roll when unrolled, no yellow or brown interior. If they're past it, refuse delivery and photograph the condition before the lorry leaves.

Ordering the wrong grade for the conditions. Shade-tolerant fescue in a full-sun lawn thins out in the second summer. Hardwearing ryegrass in a show-grade front garden looks coarse and out of place. Match the grade to the conditions: sun versus shade, wear versus ornamental. The ComparisonTable above covers the five main scenarios.