What a van can actually carry in building materials
The limit on a van full of building materials is almost never space. It is weight. Most trade loads run out of kilograms long before they run out of cubic metres, and that single fact decides which vehicle your materials need. One bulk bag of ballast on its own weighs more than the entire payload of a small van.
Our rate card quotes a payload for each van because that is the number that matters: about 600kg in a small van, 900kg in a SWB, and 1,200kg in a MWB or LWB. Here is what those figures buy you in real merchant units, worked from published product weights rather than from guesswork.
What each van carries in real merchant units| Material, as the merchant sells it | Published weight | Small van, 600kg | SWB, 900kg | MWB or LWB, 1,200kg |
|---|
| Plasterboard, 12.5mm, 2400 x 1200 sheet (2.88m²) | 7.7 kg/m², so about 22kg a sheet | 27 sheets | 40 sheets | 54 sheets |
| Cement, standard bag | 25kg | 24 bags | 36 bags | 48 bags |
| Dense concrete block, 440 x 215 x 100mm | 1,960 kg/m³, so about 18.5kg a block | 32 blocks | 48 blocks | 64 blocks |
| Bulk bag of ballast or sand | minimum 800kg, and more when wet | none, over payload | none, see below | one bag |
| Full pack of dense blocks | 54 to 72 blocks, so 1,000kg to 1,335kg | no | no | no |
Sources: plasterboard weight from the British Gypsum Gyproc WallBoard 12.5mm product data sheet, block density and pack quantity from published merchant specifications at Tippers and MKM, bulk bag minimum weight from published merchant listings including Tippers. Treat the per-unit weights as the starting point for your own load, because density and moisture both move them.
Three things in that table catch people out every week.
A bulk bag is a single-bag decision, not a two-bag one. The bag is sold on a minimum weight of 800kg with a tolerance either way, and aggregate absorbs water, so a bag that has stood in a merchant's yard through a wet week weighs more than the label. One bag goes in a MWB or LWB. Two bags do not go in any 3.5 tonne van in the country, whatever anybody tells you on the phone.
A full pack of blocks is a lorry job. At about 18.5kg a block, a 72-block pack is roughly 1,335kg before you add the pallet, and even the smaller 54-block packs land at about a tonne. That is over the payload of every van we run. If you need a pack, you need a lorry with a tail lift or a crane, and you should read the next two sections before you order anything.
The Luton buys you volume and a tail lift, not more weight. It is the vehicle you want for boards, insulation, kitchen units and anything long or awkward, because 15 to 17 cubic metres and a powered tail lift solve the handling problem. The box and the tail lift themselves are heavy, though, so on a 3.5 tonne chassis the payload sits in much the same territory as the LWB. Going up to a Luton is a decision about shape and loading, not about carrying a heavier load.
Overloading, and why we will sometimes tell you no
The weight limit on a van is not a manufacturer's suggestion. It is the vehicle's maximum authorised mass, and a standard category B car licence covers you to 3,500kg for a petrol or diesel vehicle and 4,250kg for an electric or hydrogen one, with category C1 needed from 3,500kg up to 7,500kg. That is the licence rule, and separately the vehicle itself must not exceed its plated weights.
DVSA enforces this at the roadside with graduated fixed penalties, and the bands are set in legislation rather than left to the examiner:
DVSA graduated fixed penalties for excess weight| Excess weight | Fixed penalty | Endorsable |
|---|
| Less than 10% | £100 | no |
| 10% up to but not including 15% | £200 | no |
| 15% and over | £300 | no |
Source: DVSA roadside checks: fines and financial deposits, which also sets out that examiners allow a 5% leeway before issuing a penalty or prohibition unless the weight is exceeded by a tonne or more, and that serious cases, meaning an overload of 30% or more or excess weight of 5 tonnes, go to court rather than being dealt with by a fixed penalty.
An overloaded van can also be prohibited on the spot, which means it does not move until the load comes off, and that happens at the roadside rather than at your site. For a job that was booked to stop a trade standing around, a prohibition is the worst possible outcome.
So when you tell us the load and we say a van is the wrong vehicle, that is not us upselling. It is the reason we ask what the materials are and not just how big the pile looks. If the weight needs a 7.5 tonne vehicle or the load is better as part load haulage, we will say so before anybody pays for a van that cannot legally carry it.
When the merchant's own delivery beats us, and when a lorry does
We would rather tell you this plainly than win a job we are the wrong answer for.
Take the merchant's own delivery when you have hit their free delivery threshold and tomorrow morning is genuinely fine. Most builders merchants deliver free above a spend figure, usually next working day, usually kerbside. If you are ordering a full list for a job starting Monday, that delivery costs you nothing and we cost you money. Order it from them.
You need a lorry-mounted crane, not a van, when the load has to land somewhere a pallet truck cannot reach. A tail lift puts a pallet on firm level ground at the back of the vehicle. It does not lift over a wall, up onto scaffold, across a muddy compound or onto a first-floor slab. Packs of blocks, bricks and bagged aggregates going over a boundary are crane offload jobs and the merchant or a specialist haulier is the right call.
You need a tipper or a grab, not a courier, for loose aggregate by the tonne. Loose muck, loose stone and loose soil are weighed in tonnes and tipped, which is a different vehicle and a different licence from a courier van.
Here is where we are genuinely the better option. The forgotten box of fixings at half past two. The trade counter collection your crew should not be leaving the job to do. The part load that a pallet network would hold overnight in a depot. The tight-access site that an 18 tonne rigid cannot physically get into. A single pallet that needs to be somewhere this afternoon rather than in a next-day window. The tools and equipment run between two of your own sites. Those are the jobs where a dedicated van that collects within the hour and drives straight to your gate beats every alternative on the list, and they are most of what we do for trade customers.
Site access, and the questions we ask before a van leaves
A delivery that arrives and cannot be unloaded has not arrived. These are the things we confirm when you book, and they are worth having to hand:
- Who receives it, and what the signing-in process is. Most sites want a name in a book and a site induction or a visitor escort. We would rather know that than have a driver stood at a gate.
- Whether there is a forklift or a pallet truck on site, and whether the ground will take one. A tail lift and a pallet truck need a firm level surface. A rutted compound after rain does not qualify, and that changes whether a pallet can come off at all or has to be broken down by hand.
- Where exactly the load is wanted. Dropping a pallet across an access route is the fastest way to make everyone's afternoon worse.
- Access width, height and turning. Narrow lanes, low arches, height barriers on car parks, one-way systems and weight-restricted bridges all change the vehicle we send.
- Whether the materials need to be broken down. Manual handling is the practical limit once there is no machine on site, and a 25kg bag carried a long way is a different job from a pallet set down by tail lift.
If the answer to any of those is awkward, tell us early. We plan the awkward last mile rather than discovering it.
Construction delivery questions
How many sheets of plasterboard fit in a van?
On weight, about 27 sheets of 12.5mm 2400 x 1200 board in a small van, 40 in a SWB and 54 in a MWB or LWB, working from the published 7.7 kg/m² board weight. In practice the deciding factor is usually length rather than weight, because a 2400mm sheet needs to lie flat and a 3000mm sheet needs a Luton. Tell us the sheet size and the count and we will tell you the van.
Can you bring a bulk bag of ballast or sand?
One bag, in a MWB, LWB or Luton. A bag is sold on a minimum of 800kg and gets heavier when it is wet, so it is over the payload of a small van and too close to the limit in a SWB to be worth risking. Two bags need a lorry, not a van.
Can you collect from a builders merchant on my account?
Yes. Give us the merchant, the branch, the order or collection number and the name the order sits under, and we collect and deliver to site. Scheduled trade counter runs can be set up on account for contractors.
Can you deliver a full pack of blocks or bricks?
No, and nobody should tell you otherwise in a 3.5 tonne van. A pack runs from about a tonne to over 1,300kg before the pallet. That is a lorry with a tail lift or a crane offload, which means the merchant's own transport or a specialist haulier. We will say so rather than send a van that cannot take it.
Do you take building waste away on the same visit?
That is a separate job on the junk side of the business rather than a courier run, and it is licensed differently, but it is often the sensible pairing. Materials in, waste out. The rules on what you can and cannot do with builders waste are set out in our guide to builders waste and rubble disposal rules.
Do you carry asbestos or hazardous materials?
No. We do not remove or transport asbestos ourselves. Anything of that kind goes to a licensed specialist, and we will point you to the right route rather than take it on.
We are a licensed carrier operating from 19 Portland Road in Leeds under waste carrier registration CBDU597687, with goods-in-transit cover on every load. If you tell us the materials, the weights and the site, we will tell you honestly which vehicle the job needs and what it costs before anything moves.
