Site, Traffic & Hoarding Signs

Warning to the Public Building Sites Are Dangerous Sign

SKU IB-SIT-216
From £57.10· UK delivery £7.95, free over £99

A Warning to the Public Building Sites Are Dangerous sign gives people clear information where they need it. Choose 3.5mm Correx, 3mm Dibond aluminium composite and 3mm Foamex in sizes from A1 (594 × 841 mm) to A0 (841 × 1189 mm); the largest reads at about 34 metres.

Turnaround
…Working out your price

Price is final. No VAT added. UK delivery £7.95, free over £99. Scottish Highlands +£10; islands and NI quoted.

Artwork

Design fees are fixed, shown as their own line in your basket, and cover the whole quantity of this item. You can also upload later: we email you after you order.

UK mainland delivery £7.95, free on orders over £99. Remote areas are quoted.

  • Every file checked before print
  • Final price, no VAT added
  • Secure card payment by Stripe
  • Checked by our Manchester team

Overview

The short answer, then the detail.

A Warning to the Public Building Sites Are Dangerous sign gives people clear information where they need it. Choose 3.5mm Correx, 3mm Dibond aluminium composite and 3mm Foamex in sizes from A1 (594 × 841 mm) to A0 (841 × 1189 mm); the largest reads at about 34 metres. UK mainland delivery £7.95, free over £99; no VAT added.

Use this sign where you need to say "Warning to the Public Building Sites Are Dangerous" clearly. It gives people clear information where they need it, and is commonly fitted in offices, shops, warehouses and public buildings. The design uses a white board with a bold coloured header, the standard layout for construction site signs.

Warning to the Public Building Sites Are Dangerous Sign: sizes and materials

The WARNING header flags a hazard people need to look out for; the text underneath says exactly what it is.

The Construction (Design and Management) Regulations 2015 expect site rules and hazards to be communicated to everyone on site, including visitors; a multi-message board at the gate does this in one place.

You can have it printed on 3.5mm Correx fluted polypropylene, light and waterproof, ideal for temporary and site signs, 3mm Dibond aluminium composite, rigid and weatherproof for long-term outdoor use and 3mm Foamex (rigid PVC foam board), light and easy to fix indoors or for short-term outdoor use. For signs that stay outdoors for a long time, Dibond is the most durable choice.

How far away will people be? As a guide we allow about 1 metre of viewing distance for every 25mm of sign height, based on the distance-factor method in ISO 3864-1: A1 (594 × 841 mm) (reads at about 24 m); 700 × 1000 mm (reads at about 28 m); A0 (841 × 1189 mm) (reads at about 34 m).

Where to put it: At eye level where people will act on it.

Artwork, file check and delivery

Every order for a warning to the public building sites are dangerous sign gets a free file check by a person before anything is made. Depending on the size and material you choose, we print it in our Manchester workshop or our UK production partner makes it to order. UK mainland delivery is £7.95 per order, free on orders of £99 and over; see delivery for timings and areas. We are not VAT registered, so no VAT is added to the price shown.

More like this: site safety boards, or the full site signs range. Not sure which to choose? Read our guide to safety sign colours.

Prices by size

Popular sizes, smallest first.

Size3.5mm Correx3mm Dibond aluminium composite3mm Foamex
A1 · 594 × 841 mm
700 × 1000 mm
A0 · 841 × 1189 mm

Final prices per item with the lowest-priced options. UK delivery £7.95, free on orders over £99. Choose a price to load it into the price calculator.

Specifications

Materials, sizes and finishing for this product.

MessageWarning to the Public Building Sites Are Dangerous
Sign typeSite safety
Materials3.5mm Correx, 3mm Dibond aluminium composite and 3mm Foamex
SizesA1 (594 × 841 mm), 700 × 1000 mm, A0 (841 × 1189 mm)
Viewing distanceA1: 24 m, 700 x 1000: 28 m, A0: 34 m
PrintFull colour, single sided
Made byMade to order by InstantBanners, Manchester, in our workshop or by our UK production partner, depending on the option
SKUIB-SIT-216
PriceFinal price shown in the configurator. No VAT is added.
DeliveryUK mainland £7.95 per order, free on orders of £99 and over. Scottish Highlands +£10; islands and NI quoted.
Artwork checkFree file check on uploaded artwork (resolution, size and bleed).

Which size do I need?

A safety sign must be large enough to read from where people will see it. Our conservative guide, based on the distance-factor method in ISO 3864-1, is about 1 metre of viewing distance for every 25 mm of sign height (the shorter side). Use it with your own risk assessment.

SizeReadable from up to about
A1 (594 × 841 mm)24 m
700 × 1000 mm28 m
A0 (841 × 1189 mm)34 m

Well lit or internally lit signs can be read from further away; dim areas need larger signs.

Who makes it

Made to order by InstantBanners, Manchester

InstantBanners is a sign and print shop in Manchester. We check your file will print well. Depending on the size and material you choose, it is printed in our Manchester workshop or made by our UK production partner.

  1. 01Your artworkUpload your print-ready file, or choose one of our paid design services.
  2. 02File checkA person checks uploaded files for size, bleed and resolution.
  3. 03Made to orderPrinted in our Manchester workshop or by our UK production partner, depending on the option, then sent to you.

Frequently asked questions

About warning to the public building sites are dangerous sign.

What size Warning to the Public Building Sites Are Dangerous sign do I need?

Work back from the viewing distance: about 24 m for A1 (594 × 841 mm), about 28 m for 700 × 1000 mm, about 34 m for A0 (841 × 1189 mm). In poor light or where people are moving fast, go a size up.

Is there an ISO 7010 symbol for "Warning to the Public Building Sites Are Dangerous"?

No ISO 7010 symbol covers this exact message, so it is a text sign in the standard site board colour layout.

Where should the Warning to the Public Building Sites Are Dangerous sign go?

At eye level where people will act on it. Check it is visible from the direction people approach.

Is a Warning to the Public Building Sites Are Dangerous sign a legal requirement?

The Construction (Design and Management) Regulations 2015 expect site rules and hazards to be communicated to everyone on site, including visitors; a multi-message board at the gate does this in one place. Your own risk assessment decides where signs are needed.

Can I put the Warning to the Public Building Sites Are Dangerous sign outside?

Yes, in Dibond or Correx. Foamex is best kept indoors or in sheltered spots.

What does the colour of the sign mean?

Site boards group several safety messages under a coloured header. This sign follows that layout.

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What customers say about our Manchester print shop on Google

5.0Google rating
Rebecca W.

Great service, nice quick communication via WhatsApp, easy transaction thank you!

Google review of our Manchester print shop
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Great service and quick respond

Google review of our Manchester print shop
Basheus K.

Great service, value for money and does what he says. Hes a good man Imran.

Google review of our Manchester print shop

These are Google reviews of our Manchester print shop, not reviews of individual products, as shown on Google on 27 September 2026. Read all reviews on Google.

Questions

Buyer questions about this product, answered. Can't see yours? Ask below and our team will reply.

What sizes does the Warning to the Public Building Sites Are Dangerous Sign come in?

The Warning to the Public Building Sites Are Dangerous Sign comes in 3 listed sizes, from A1 (594 × 841 mm) at £57.10 up to A0 (841 × 1189 mm) at £94.63. In between: 700 × 1000 mm. Prices are the lowest option for each size.

Which board material is right for this site board?

The Warning to the Public Building Sites Are Dangerous Sign is printed on 3.5mm Correx, 3mm Dibond aluminium composite and 3mm Foamex. Foamex (foamed PVC) is light and smooth: great indoors and in sheltered spots; thicker Foamex is stiffer over bigger sizes. Dibond (aluminium composite) is rigid, flat and weatherproof, the one for long-term outdoor signs. Correx (fluted polypropylene) is the lightest and cheapest, waterproof, and made for temporary signs. Our Foamex vs Dibond vs Correx guide compares them side by side.

What artwork options are there for the Warning to the Public Building Sites Are Dangerous Sign?

The Artwork choice on this page offers: "I will upload print-ready artwork" (free), "Add my text and logo to a clean layout (typesetting)" (£15), "Design it for me from my brief" (£35), "Redraw or vectorise my logo from a low-res file" (£50) and "Design a new logo for me" (£100). Design fees are fixed, show as their own line in the basket and cover the whole quantity of that item. Typesetting includes 1 proof and 2 rounds of changes; design from your brief includes 1 design and 2 rounds of changes. The Warning to the Public Building Sites Are Dangerous Sign comes in 3 listed sizes, from A1 (594 × 841 mm) to A0 (841 × 1189 mm).

What is the cheapest price for the Warning to the Public Building Sites Are Dangerous Sign?

The lowest price is £57.10, which is what the calculator opens on: size A1 (594 × 841 mm) and material 3.5mm Correx. Every other combination is priced as you choose it, including faster turnaround, and that price is final because we do not add VAT. UK mainland delivery is £7.95 per order and free when your goods total is £99 or more after any discount code (artwork and design fees do not count towards it).

How much is delivery for the Warning to the Public Building Sites Are Dangerous Sign?

UK mainland delivery is £7.95 per order and free when your goods total is £99 or more after any discount code (artwork and design fees do not count towards it), so one site board at £57.10 on its own pays £7.95, and the charge disappears once your basket reaches £99. Mainland Scottish Highlands postcodes add £10 once per order. Northern Ireland, the Scottish islands, the Isle of Man, the Channel Islands, the Isles of Scilly and the Isle of Wight are quoted before you order.

How quickly can I get the Warning to the Public Building Sites Are Dangerous Sign?

Saver is ready to dispatch in 5 working days, Standard in 3 and Express in 2, counted in working days (Monday to Friday, not bank holidays) from when your order and artwork are confirmed. The exact figure for your chosen size and options shows beside each turnaround in the calculator. Courier delivery usually takes 1 to 3 working days after dispatch, and we email the tracking details when the parcel leaves us. On the opening option, the Warning to the Public Building Sites Are Dangerous Sign is ready to dispatch in 5 working days on Saver or 2 on Express.

What goes on a site safety board like the Warning to the Public Building Sites Are Dangerous Sign?

A site safety board sets out the main rules for everyone entering a site: the PPE to wear, where to report, and the hazards and prohibitions that apply. The Construction (Design and Management) Regulations 2015 expect clear information for workers and visitors, and a board at the entrance is the usual way to give it. Check the wording matches your site rules and your risk assessment before you order. The wording on the Warning to the Public Building Sites Are Dangerous Sign is "Warning to the Public Building Sites Are Dangerous".

How thick is the Warning to the Public Building Sites Are Dangerous Sign?

The board options are 3.5mm Correx, 3mm Dibond aluminium composite and 3mm Foamex, so the board version is as thick as the figure in its name. Dibond is two thin aluminium skins with a plastic core, so it is rigid but still easy to fix. Foamex is a light foamed PVC board.

Will the Warning to the Public Building Sites Are Dangerous Sign show up at night?

Only where there is light on it. We print on 3.5mm Correx, 3mm Dibond aluminium composite and 3mm Foamex, which are not reflective or glow in the dark. For car parks, yards and routes used after dark, position signs under existing lighting, or light them. Where your risk assessment calls for reflective or photoluminescent signs, you will need a specialist supplier.

Which file types do you accept for the Warning to the Public Building Sites Are Dangerous Sign?

A PDF at the finished size is best, with fonts embedded or converted to outlines. We also take AI, EPS and SVG, and high resolution JPG, PNG or TIFF files. Word, PowerPoint and Canva files are fine as a starting point, but export a full-quality PDF if you can. You can upload up to 3 files of 25 MB each on the product page, or upload later: we email you after you order. The Warning to the Public Building Sites Are Dangerous Sign comes in 3 listed sizes, from A1 (594 × 841 mm) to A0 (841 × 1189 mm).

Can my designer send the file straight to you?

Yes. You can upload your file on the product page, or place the order and upload later: we email you after you order. Your designer can send the file to us by email or WhatsApp with your order number, so it does not have to come through you. The turnaround clock starts once your order and artwork are confirmed, so send the file early if you have a deadline. The Warning to the Public Building Sites Are Dangerous Sign is printed on 3.5mm Correx, 3mm Dibond aluminium composite and 3mm Foamex.

What happens if my file is not good enough to print?

Our file check catches the usual problems: the wrong size, no bleed, low resolution images and text too close to the edge. We tell you what needs fixing before anything is printed, and you can send a new file. If you would rather we sort it, the typesetting option (£15, 1 proof and 2 rounds of changes) sets your text and logo on a clean layout. The Warning to the Public Building Sites Are Dangerous Sign is printed on 3.5mm Correx, 3mm Dibond aluminium composite and 3mm Foamex.

What resolution does my artwork need for this site board?

For large items read from a distance, 100 to 150 dpi at the finished size is enough. At 100 dpi an A0 (841 × 1189 mm) design needs about 3,311 × 4,681 pixels. Logos and text are best as vector artwork, which stays sharp at any size. Photos taken from websites or social media are usually far too small; our file check flags images that may print soft.

Do you check my file before printing?

Yes. A person from our team checks every uploaded file for size, bleed and resolution, and tells you if something needs fixing before anything is made. We print what you supply, so check spelling, phone numbers and dates yourself too. Production starts once your order and artwork are confirmed. For the Warning to the Public Building Sites Are Dangerous Sign, set your file up at the size you order, for example A1 (594 × 841 mm).

How do I order several of this site board?

The price shown is for one site board in the size and material you pick. Set the quantity box next to Add to basket and the basket multiplies it. If you need several different sizes or materials, add each one to the basket separately. One artwork fee covers the whole quantity of a line, and "Same artwork as another item in my basket" adds no second fee. For large runs, ask for a quote. The Warning to the Public Building Sites Are Dangerous Sign comes in 3 listed sizes, from A1 (594 × 841 mm) to A0 (841 × 1189 mm).

Will the price change at checkout?

Only delivery is added. The goods price you see in the calculator is final, with no VAT added. UK mainland delivery is £7.95 per order and free when your goods total is £99 or more after any discount code (artwork and design fees do not count towards it). Any artwork or design fee you choose shows as its own line in the basket, so you can see exactly what you are paying for. The Warning to the Public Building Sites Are Dangerous Sign comes in 3 listed sizes, from A1 (594 × 841 mm) to A0 (841 × 1189 mm).

Can you deliver to Northern Ireland, the Highlands or the islands?

Yes, with a difference in price. Mainland Scottish Highlands postcodes, for example around Inverness, Fort William, Oban and Thurso, pay the mainland rate plus £10 once per order, even when the order qualifies for free delivery. Northern Ireland, the Scottish islands, the Isle of Man, the Channel Islands, the Isles of Scilly and the Isle of Wight are quoted before you order: use Get a quote or call 0161 315 1151. We do not deliver outside the UK. The Warning to the Public Building Sites Are Dangerous Sign starts at £57.10 before delivery.

I have a deadline. Is there a faster option for this site board?

Yes. Express makes this site board ready to dispatch in 2 working days on the opening option, priced at £76.13 against £57.10 on Saver (5 days). To plan back from a date, add 1 to 3 working days for the courier after dispatch and allow for artwork: production starts once your order and artwork are confirmed. If the date is very tight, call 0161 315 1151 before you order.

How do the material prices compare on the Warning to the Public Building Sites Are Dangerous Sign?

At A1 (594 × 841 mm): 3.5mm Correx £57.10, 3mm Dibond aluminium composite £93.05 and 3mm Foamex £66.46. The gap stays similar on bigger sizes, which the Prices by size table on this page shows in full. Choose on where the site board goes rather than price alone: the cheapest material is not always the one that lasts in that spot.

I am one of the builders and contractors. Would I use this site board?

Use this sign where you need to say "Warning to the Public Building Sites Are Dangerous" clearly. It is part of our Builders & Construction range, which gathers what builders and contractors order for building sites. Other items in the same range include Scaffold Banners, Correx Boards, Printed Hoarding Boards and Caution Fragile Roof Sign. You can mix items in one basket, and delivery is free once the goods total reaches £99. The Warning to the Public Building Sites Are Dangerous Sign is part of our Builders & Construction range.

What other signs go with the Warning to the Public Building Sites Are Dangerous Sign?

Signs that are often needed alongside it include Warning This Site Is Dangerous Sign, Warning Construction Site Sign, Danger Construction Site Sign and Building Sites Are Dangerous Sign. Each has its own page with sizes, materials and live prices, and ordering them in the same material keeps a set looking consistent. Add them to one basket: delivery is charged once, and it is free once the goods total reaches £99. The Warning to the Public Building Sites Are Dangerous Sign is part of our Builders & Construction range.

Can I get the Warning to the Public Building Sites Are Dangerous Sign bigger than A0 (841 × 1189 mm)?

The largest listed size is A0 (841 × 1189 mm), from £94.63. For a bigger sign, use Get a quote with the size, material and quantity, and we will price it. Boards larger than A0 travel as oversize items, which adds £15 once per order.

Can I put the Warning to the Public Building Sites Are Dangerous Sign on a door?

Yes, fixed with double-sided foam tape or screws. A 3mm Foamex board with double-sided foam tape also works well on a flat door. Place it at eye level on the push side or beside the door, where it is not hidden when the door is open. If the door is a fire door, check with whoever manages it before screwing anything into it.

Can I have the Warning to the Public Building Sites Are Dangerous Sign in another language, or in two languages?

Yes. Choose "Add my text and logo to a clean layout (typesetting)" (£15) and send the wording in each language; you get 1 proof and 2 rounds of changes. Keep the symbol and the sign colours the same so the meaning stays clear to everyone. Please send the translation yourself: we lay out the text you give us, we do not translate. For the Warning to the Public Building Sites Are Dangerous Sign, set your file up at the size you order, for example A1 (594 × 841 mm).

Should my artwork be CMYK or RGB?

Supply CMYK where you can. RGB files are converted to CMYK for print, which can make very bright greens, blues and oranges look slightly duller. If you need a brand colour matched, give us the Pantone reference and we match it as closely as the material allows. Small differences between a screen and the printed item are normal, because screens give off light and print reflects it. The Warning to the Public Building Sites Are Dangerous Sign is printed on 3.5mm Correx, 3mm Dibond aluminium composite and 3mm Foamex.

Can someone help me choose the right options for this site board?

Yes. Call us on 0161 315 1151 or message us on WhatsApp and tell us where the site board will go, how long it needs to last and your deadline. You can also ask a question on this page; our team answers and the question may be published to help other buyers. For a price on something the calculator does not cover, use Get a quote. The Warning to the Public Building Sites Are Dangerous Sign comes in 3 listed sizes, from A1 (594 × 841 mm) to A0 (841 × 1189 mm).

Can I get a quote for a large order or an unusual size of the Warning to the Public Building Sites Are Dangerous Sign?

Yes. Use the Get a quote page and tell us the size, quantity, material, deadline and delivery postcode, and attach any artwork you have. We reply by email or WhatsApp with a price. A quote is also the way to go for delivery to Northern Ireland and the islands. The Warning to the Public Building Sites Are Dangerous Sign starts at £57.10 before delivery.

Do I need an account to order?

No. You can check out as a guest and pay by debit or credit card, processed securely by Stripe. Creating an account at checkout lets you see past orders in My Account. Either way you get an order confirmation email and a tracking email when your order is dispatched. The Warning to the Public Building Sites Are Dangerous Sign starts at £57.10 before delivery.

What payment methods can I use for the Warning to the Public Building Sites Are Dangerous Sign?

By debit or credit card at checkout. Payments are processed securely by Stripe, and we never see or store your full card number. Your order goes into production once payment is taken and your order and artwork are confirmed. For a large or unusual order you can ask for a quote first. The Warning to the Public Building Sites Are Dangerous Sign starts at £57.10 before delivery.

Where is the Warning to the Public Building Sites Are Dangerous Sign made?

The Warning to the Public Building Sites Are Dangerous Sign is printed in our Manchester workshop or by our UK production partner, depending on the size and material. Either way, InstantBanners takes the order, checks your file and deals with you from start to finish, and the item is delivered to you by courier. You can reach our Manchester team on 0161 315 1151 or WhatsApp if you have a question before or after you order.

What if I spot a mistake after I order?

Contact us straight away on 0161 315 1151 or WhatsApp with your order number. If production has not started we can take a corrected file, or cancel the order and refund you in full. Once production starts the order cannot be changed. Printing that matches the design you approved or the file you supplied is not a fault, so check spelling, phone numbers and dates carefully before you order. The Warning to the Public Building Sites Are Dangerous Sign is printed in our Manchester workshop or by our UK production partner, depending on the size and material.

Can I order several different designs in one order?

Yes. Add each design to the basket as its own line with its own file or online design, then check out once. Delivery is charged once per order, and becomes free when the goods total reaches £99. If several lines use the same artwork, choose "Same artwork as another item in my basket" so you only pay one design fee. The Warning to the Public Building Sites Are Dangerous Sign comes in 3 listed sizes, from A1 (594 × 841 mm) to A0 (841 × 1189 mm).

Can I return this site board if I change my mind?

No. This site board is printed to your order, and the 14-day right to cancel does not apply to goods made to your specification (Consumer Contracts Regulations 2013, regulation 28(1)(b)). You can cancel for a full refund before production starts. If an item is faulty, damaged or not what you ordered, your Consumer Rights Act 2015 rights apply and we reprint or refund. The Warning to the Public Building Sites Are Dangerous Sign is printed in our Manchester workshop or by our UK production partner, depending on the size and material.

Can I get a VAT invoice?

No. We are not VAT registered, so we do not charge VAT and cannot issue a VAT invoice. You get an order confirmation email with the items, options and total paid, which works as your receipt. Because no VAT is added, the price you see in the calculator is the price you pay for the goods, with delivery shown at checkout. The Warning to the Public Building Sites Are Dangerous Sign starts at £57.10 before delivery.

Can I reorder the same site board later?

Yes. Order the same product and options again and upload the same file. Keep your print-ready file safe so a repeat order is quick. If anything like a phone number or price has changed, update the artwork before you reorder. The Warning to the Public Building Sites Are Dangerous Sign starts at £57.10 before delivery.

What if my order arrives damaged?

Check it when it arrives. If anything is damaged or missing, tell us within 48 hours with photos of the item and the packaging, through the contact form or on WhatsApp, with your order number. Do not send anything back until we reply; we then arrange a reprint or a refund. This does not affect your legal rights, which the returns page explains. On the opening option, the Warning to the Public Building Sites Are Dangerous Sign is ready to dispatch in 5 working days on Saver or 2 on Express.

How do I clean this site board?

Wipe with a soft cloth and warm, soapy water, then rinse and dry. Do not use solvents, scouring pads or strong cleaners, which can dull or lift the print. Store spare boards flat so they do not bow. The Warning to the Public Building Sites Are Dangerous Sign is printed on 3.5mm Correx, 3mm Dibond aluminium composite and 3mm Foamex.

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