Support

Need help using concretemaths.com/? Find support for UK concrete guides, cost guides, ready-mix resources, BS 8500 guides, downloads, project planning resources and troubleshooting steps.

Concrete Guide Support

Concrete guides depend on accurate measurements. The most common issue is entering dimensions in the wrong unit or forgetting to convert millimetres to metres. For example, a slab that is 100mm thick should be entered as 0.1m in a formula, but most ConcreteMaths guides let you enter depth in millimetres and do the conversion for you. Always read the measurement label carefully before working out.

Another common issue is expecting the exact supplier order quantity to equal the theoretical volume. In real construction, you usually add waste or tolerance. Simple slabs may need around 5% allowance, most domestic projects use around 10%, and uneven footings or complex shapes may need 15–20%. Running short during a concrete pour can be much more expensive than ordering a sensible allowance.

Problem: Volume seems too high; Likely Cause: Depth or unit entered incorrectly; What to Check: Whether depth is in mm, cm or metres; Best Fix: Re-Measure the Dimensions and check measurement labels
Problem: Order quantity differs from volume; Likely Cause: Waste allowance added; What to Check: Waste percentage and rounding rules; Best Fix: Use 5–10% for simple slabs, more for trenches
Problem: Cost estimate differs from quote; Likely Cause: Supplier quote includes extras; What to Check: Delivery, VAT, minimum load, waiting time, pump; Best Fix: Ask supplier for an itemised written quote
Problem: Mix recommendation seems unclear; Likely Cause: Project needs specification check; What to Check: Structural use, exposure, ground and design; Best Fix: Follow engineer, Building Control or supplier technical advice
Problem: Guide not responding; Likely Cause: Browser/script/cache issue; What to Check: Required fields, browser extensions, cached page; Best Fix: Refresh page, try another browser, report issue

Which Concrete Guide Should I Use?

Use a slab guide for patios, shed bases, garden rooms, floors and rectangular concrete areas. Use a footings guide for strip foundations, trench fill or pad foundations. Use a driveway guide when the project needs external exposure, drainage falls, sub-base and traffic loading. Use a ready-mix volume guide when you already know the project dimensions and need cubic metres plus waste allowance. Use a cost guide when you need supply, labour, delivery, VAT and access allowances in one result.

Concrete Cost Guide Help

Cost guides are designed for planning, not final pricing. A concrete price depends on region, supplier, concrete grade, load size, delivery distance, access, waiting time, pump hire, labour, VAT and current market conditions. If a guide gives one number and your local supplier gives another, the supplier quote is usually more specific because it reflects their plant, lorry schedule, delivery route and commercial terms.

The best way to use a cost guide is to prepare a budget range before you request quotes. Use the guide to estimate volume, order quantity and likely project cost. Then ask at least two or three suppliers or contractors for written quotes based on the same dimensions, mix grade and access details. Compare delivered price, not just price per cubic metre.

Supply Cost

Concrete supply usually depends on cubic metres, grade, admixtures, plant distance and minimum load rules.

Delivery Cost

Delivery may be included or charged separately. Small loads, rural areas and restricted access can increase the delivered total.

Labour Cost

Placing, levelling, tamping, floating, curing and clean-up can cost more when access is difficult or finish quality is high.

Quote Comparison Tip

Always check whether a quote is excluding VAT or including VAT. A quote that looks 20% cheaper may simply be shown ex VAT. Also check whether pump hire, waiting time, part-load charges and waste disposal are included.

Ready-Mix Concrete Ordering Support

Ready-mix concrete ordering is easier when you prepare the right information before calling. Suppliers will normally ask for your postcode, project type, volume, mix grade, delivery date, access details and whether you need a pump. They may also ask about slump/consistence, aggregate size, fibres, admixtures and whether the project is structural or external.

If you are unsure about the mix grade, do not guess for structural work. For a garden shed base, a common domestic base mix may be suitable. For driveways, external frost exposure and de-icing salt risk may matter. For foundations, soil conditions and sulphate class may affect the concrete type. For designed structural concrete, use the specification from your engineer or designer.

Have dimensions ready:length, width, depth and any irregular areas.
Know your access:chute, barrow, dumper, line pump or boom pump.
Confirm waste allowance:exact theoretical volume is rarely the safest order quantity.
Ask about waiting time:slow barrowing can trigger extra charges.
Plan labour:concrete must be placed and finished promptly.
Prepare washout:never allow concrete washout into drains or public roads.
Check weather:cold, heat, rain and wind can affect placement and curing.
Keep delivery ticket:useful for records, Building Control and project documentation.

Technical Support & Troubleshooting

If a guide, table, accordion or download is not working, first refresh the page and try again. Most issues are caused by a cached page, browser extension, old browser version, blocked JavaScript or a temporary connection problem. ConcreteMaths guides run in the browser, so JavaScript must be enabled for the resources to work out results and show result panels.

If the issue continues, try another browser such as Chrome, Edge, Safari or Firefox. On mobile, close and reopen the browser section. If a download does not open, check whether your device blocks file downloads or whether the file opened in a separate downloads folder. Spreadsheet downloads may require Microsoft Excel, Google Sheets, LibreOffice or another compatible spreadsheet app.

Issue: Download not opening; Try First: Check downloads folder; Then Try: Try desktop browser or another app; Report With: File name and device type
Issue: FAQ accordion stuck; Try First: Refresh page; Then Try: Clear browser cache; Report With: Page URL and screenshot
Issue: Result seems wrong; Try First: Check dimensions and units; Then Try: Recalculate with a simple example; Report With: measurements entered and expected result

Best Way to Report a Guide Issue

Include the guide name, page URL, all measurement values, the result shown, what you expected, your device/browser and a screenshot if possible. This makes it much easier to identify and fix the issue.

Content, Data & Correction Requests

concretemaths.com/ aims to keep guides practical, clear and useful for UK users. Construction information can change, and local prices are always approximate. If you spot a typo, broken link, outdated reference, unclear guide label or confusing explanation, it helps to report the exact page and section. Corrections are easiest to review when they include the original text, the suggested correction and a reason.

Price pages and supplier pages should be treated as guidance, not live price guarantees. Ready-mix prices, labour rates, delivery rules and supplier coverage can change quickly. If you are a supplier, contractor or trade professional and believe a page needs updated regional context, provide verifiable information and clear wording rather than advertising claims.

Report broken links:include the page and the link text.
Suggest content updates:include the section heading and proposed wording.
Flag outdated data:explain what has changed and provide a reliable source if available.
Request new guides:describe the project type, measurements needed and figure you want.
Supplier listing requests:provide business name, region, service type and quality/coverage details.

Contact concretemaths.com/ Support

For general help, feedback, guide issues, correction requests or partnership enquiries, use the contact option on concretemaths.com/. To get the fastest response, include enough detail for the issue to be understood without multiple follow-up questions. For guide issues, include your measurement values and the result shown. For project advice, remember that the site can provide general guidance only; it cannot inspect your site or approve regulated work.

Report a Bug

Send the guide name, page URL, browser/device, values entered, result shown and screenshot if available.

Suggest an Update

Flag outdated content, broken links, unclear wording, missing topics or new 2026 guidance that should be added.

Supplier or Trade Enquiry

For directory or supplier information, provide business details, coverage area, concrete type and service category.

Safety-Critical Questions Need a Professional

If your question involves structural safety, foundation design, load-bearing walls, retaining walls, poor ground, drains, trees, subsidence, regulated work or active site risk, contact a qualified professional or Building Control rather than relying on online guidance alone.

Help by Project Type

Different projects need different support. A shed base user usually needs volume, bagged-vs-ready-mix guidance and sub-base advice. An extension user needs foundations, Building Control, concrete grade and DPC/DPM context. A driveway user needs drainage, external concrete and finish guidance. Use the table below to find the right help route.

Project: Shed Base / Patio; Main Help Needed: Volume, depth, sub-base, waste allowance; Useful Guide / Guide: Concrete Slab Guide; Professional Check?: Usually No
Project: Driveway; Main Help Needed: Concrete grade, drainage, sub-base, finish; Useful Guide / Guide: Driveway Cost Guide; Professional Check?: Sometimes
Project: Extension Foundations; Main Help Needed: Footing depth, ground, trees, Building Control; Useful Guide / Guide: Extension Foundations Guide; Professional Check?: Yes
Project: Garage Base; Main Help Needed: Thickness, reinforcement, DPM, level tolerance; Useful Guide / Guide: Garage Base Guide; Professional Check?: Often
Project: Concrete Specification; Main Help Needed: BS 8500, mix designation, exposure class; Useful Guide / Guide: BS 8500 Mix Guide; Professional Check?: For Structural Work
Project: Ready-Mix Ordering; Main Help Needed: m³, delivery, waiting time, pump, VAT; Useful Guide / Guide: Ready-Mix Supplier Guide; Professional Check?: Supplier Confirm

How We Present Guide Results

concretemaths.com/ pages are written to be clear for non-specialists while still using UK construction terminology where it matters. A guide result may include measured volume, order volume, waste allowance, bag estimate, ready-mix estimate, cost range or guidance notes. These figures should be read together. For example, a volume result tells you the theoretical concrete required, while the order quantity includes waste and rounding. A cost result may include broad allowances, but a supplier quote may include delivery terms that the guide cannot know.

When a result includes warnings, those warnings are not errors. They are reminders that the project may need professional measurement, better site information, Building Control inspection or supplier confirmation. This is especially important for footings, retaining walls, structural slabs, reinforced concrete, basements, poor ground, trees near foundations, sulphate-bearing ground or work connected to a dwelling.

Privacy, Accessibility & User Feedback

The Help Center should make it easy for users to understand what support is available and what information may be needed to investigate issues. When reporting problems, avoid sending unnecessary personal details. For guide troubleshooting, the most useful information is usually the page URL, device, browser, measurement values and screenshot. For supplier or business enquiries, send factual coverage and service details rather than personal customer data.

Accessibility also matters. Guide labels should be clear, options should be easy to tap on mobile, tables should have mobile-friendly card versions and FAQ sections should be readable without specialist knowledge. If a user finds a page hard to read, difficult to use on mobile or confusing because of terminology, that is useful feedback and can improve the site for everyone.

How to Use concretemaths.com/ Guides Safely

Online guides are helpful when the job is clearly defined, the dimensions are accurate and the result is used as an estimate. They are less reliable when the project depends on hidden ground conditions, existing structure, drainage, tree roots, moisture, contaminated land, unknown loading or Building Regulations decisions. The safest way to use concretemaths.com/ is to treat guide results as a preparation step before professional checks and supplier quotes.

For example, a concrete slab guide can work out length × width × depth accurately, but it cannot know whether the ground has been compacted properly, whether a DPM is required, whether the slab needs reinforcement or whether the concrete grade is suitable for the intended loading. A footings guide can estimate trench concrete volume, but it cannot decide whether clay shrinkage, nearby trees, drains or made ground require a different foundation design. This is why safety notes appear throughout the site.

If you are a homeowner, use guides to understand the scale of the job and ask better questions. If you are a contractor, use them as a fast check alongside your own site measurement and specification. If you are a student or researcher, use them to understand UK construction terminology and estimating logic. In every case, remember that the final decision belongs to the person responsible for the work, not the guide.

Good Guide Use

Measuring a simple slab, comparing rough costs, preparing supplier calls, checking bag quantities or understanding standard terminology.

Needs Caution

Foundations, retaining walls, reinforced slabs, driveways, drainage, DPC/DPM details, tree risk and poor ground conditions.

Needs Professional measurement

Structural design, load-bearing wall changes, subsidence, basements, large pours, commercial work and Building Control approval.

Best Support Workflow: From Problem to Answer

Most support questions can be solved faster when the issue is broken into a simple workflow. First identify the page or resource. Then check the measurements, because most guide issues come from units, thickness, waste percentage or selecting the wrong project type. Next compare the result with the page explanation. Finally, if something still looks wrong, send a clear report with the exact values used.

This workflow works for volume guides, cost guides, unit conversion guides, spreadsheet downloads and guide pages. It also helps support requests stay useful. A message saying “the guide is wrong” is hard to investigate. A message saying “on the Footings Guide, I entered 12m length, 0.6m width and 300mm depth, and the result showed X when I expected Y” is much easier to review and fix.

Step: 1; What to Do: Identify the page; Why It Helps: Support can find the exact guide or article; Example: Concrete Slab Guide UK
Step: 2; What to Do: Record the measurements; Why It Helps: Most issues depend on the values entered; Example: Length, width, depth, waste, region
Step: 3; What to Do: Check units; Why It Helps: Unit errors are the most common cause of wrong-looking results; Example: 100mm is 0.1m, not 100m
Step: 4; What to Do: Read the notes; Why It Helps: Many results include waste, VAT or rounded order quantity; Example: 3.63m³ may round to 4.0m³ order
Step: 5; What to Do: Send a clear report; Why It Helps: Detailed reports are easier to investigate; Example: URL, screenshot, measurements, expected result

Download & Spreadsheet Support

concretemaths.com/ may provide downloadable spreadsheets, checklists, tables and reference documents to help users plan projects offline. These resources are designed as planning aids. They may include formulas, example values, reference tables and user-measurement cells. Always read any “Start Here”, “Notes” or “Sources” sheet before using a spreadsheet for real work.

If a spreadsheet does not work out correctly, first check whether formulas are enabled. Some apps open files in protected or preview mode. If using Google Sheets, upload the file properly rather than only previewing it. If using Excel, enable editing only if you trust the source and then check whether cells are formatted as numbers. If a value has been pasted with units like “100mm” into a numeric cell that expects “100”, the formula may fail.

Spreadsheets should not be treated as certified design software. A mix design spreadsheet can help understand relationships between strength class, water/cement ratio, cement content and aggregate quantities, but real concrete specification still needs professional confirmation. A quantity spreadsheet can estimate materials, but supplier packaging, compaction, moisture, waste and delivery terms can change the final order.

Spreadsheet Safety Warning

Do not rely on a downloaded spreadsheet alone for structural design, regulated work, safety-critical decisions or commercial specification. Use it as a planning and learning resource, then verify with a competent professional.

Editorial Support, Standards and Updates

concretemaths.com/ pages often refer to UK construction topics such as BS 8500, BS EN 206, Approved Document A, Approved Document C, DPC/DPM detailing, foundation guidance, concrete exposure classes and ready-mix ordering. These topics can be technical, and the site aims to explain them in plain English while still warning users when a professional specification is needed.

Editorial updates should focus on accuracy, clarity and usefulness. A good correction request explains what is unclear, why it matters and what the improved wording should say. A good data update explains whether a figure is outdated, whether it is national or regional, and whether the source is reliable. A good new-page request explains the search intent and the user problem, not just the page title.

For supplier directories, editorial quality is especially important. A directory page should help users understand supplier types, coverage and quote-checking questions. It should not make unsupported claims that one supplier is always best. If supplier information changes, it should be updated carefully with factual service details, not exaggerated marketing language.

Accessibility & Mobile Help

Many concretemaths.com/ visitors use guides on mobile while standing on site, measuring a slab, checking a quote or preparing to call a supplier. This means pages should be mobile-friendly, easy to read and simple to tap. The layout uses responsive cards, mobile tables and large guide options so users do not need to zoom on small screens.

If a guide is hard to use on your device, report the issue with the device model, browser and screenshot. Useful feedback includes options that are too small, tables that overflow, labels that wrap badly, choices that are unclear or result panels that do not scroll into view. Accessibility improvements often help everyone, not only users with specific access needs.

For users who rely in the article readers or keyboard navigation, clear headings, labels and link text matter. If a link says only “follow here”, it is less useful than a link that says “open the ready-mix concrete volume guide”. If a table is too complex, a mobile card version can make the same information easier to follow.

Finding the Right concretemaths.com/ Page

If you are not sure where to start, use the Getting Started guide for general planning, the UK Concrete Cost Guides page for budgets, the Ready-Mix Volume Guide for cubic metres and the BS 8500 guide for concrete specification context. For foundations, use the Footings Guide or Extension Foundations guide. For moisture protection, use the DPC & DPM Requirements page. For local supply, use the Regional Concrete Suppliers Directory or Regional Concrete Guides guide.

Search intent matters. A user searching for “how much concrete do I need?” usually needs a volume guide. A user searching for “how much will concrete cost?” needs a cost guide. A user searching for “what concrete mix for driveway?” needs a mix guide and external exposure warning. A user searching for “foundation depth near trees” needs specialist guidance and professional checks, not just a guide.

User Question: How many cubic metres?; Best Page Type: Volume guide; Helpful figure: m³ + waste allowance; Warning Level: Low
User Question: How much will it cost?; Best Page Type: Cost guide; Helpful figure: Supply + labour + VAT range; Warning Level: Medium
User Question: Which concrete mix?; Best Page Type: BS 8500 / mix guide; Helpful figure: Mix direction and specification notes; Warning Level: Check
User Question: How deep foundations?; Best Page Type: Foundation guide; Helpful figure: Risk factors and inspection notes; Warning Level: High
User Question: Supplier near me?; Best Page Type: Supplier directory; Helpful figure: Supplier type and quote questions; Warning Level: Confirm

Support & Help Center — Frequently Asked Questions

Common questions about using concretemaths.com/ guides, guides, downloads, cost guides and support resources.

The guides are designed to provide practical estimates based on standard formulas, UK construction assumptions and common project measurements. However, results depend on the accuracy of the values you enter and cannot account for every site condition. Use them for planning and quote preparation, then confirm final quantities, specifications and prices with suppliers, contractors or professionals where required.

Supplier quotes can include delivery, minimum-load charges, waiting time, VAT, pump hire, admixtures, fibres, local demand, plant distance and access risks. A guide provides an estimate; a supplier quote reflects that supplier’s actual terms and local costs. Always compare quotes on the same basis and ask for an itemised breakdown.

concretemaths.com/ can explain common mix options and typical uses, but it cannot replace a project-specific specification. Structural concrete, foundations, reinforced concrete, driveways, sulphate-bearing ground and exposure-sensitive work may need a specific mix under BS 8500 / BS EN 206 guidance. Follow your engineer, designer, Building Control officer or supplier technical department where required.

It depends on the project. Simple garden bases and patios may not need Building Regulations approval, but extension foundations, structural slabs, retaining walls, garages connected to a dwelling, load-bearing changes and drainage-related work may require approval or inspection. Check with your local authority Building Control or an approved inspector before work begins.

Include the guide name, page URL, device, browser, values entered, result shown, expected result and screenshot if possible. For formula concerns, explain the working you expected. This helps identify whether the issue is an measurement misunderstanding, browser problem, rounding rule or genuine bug.

Yes. Useful requests include the project type, what measurements the guide should ask for, what figures it should generate and whether it should follow a UK standard, Building Regulations topic or common supplier workflow. Examples include drainage guides, reinforcement resources, new regional concrete guides, cost comparison pages and downloadable spreadsheets.

Downloads provided on concretemaths.com/ are intended as free planning aids unless a page states otherwise. Always read the notes inside the spreadsheet or download. Spreadsheets are not a substitute for professional design, supplier verification or Building Control approval where those are required.

Supplier listing requests can be considered where they are useful to users and include clear regional coverage, service type, concrete products, delivery areas and quality information. Listings should be factual and helpful rather than promotional. Inclusion, update or removal policies should be handled through the site’s editorial process.

Helpful concretemaths.com/ Resources

Start with these popular resources and guides if you need support planning a concrete or building project.

Popular Support Topics

Guide Help

Ready-Mix Ordering

BS 8500 Guidance

Cost Guide Support

Foundation & Building Guides

Downloads & Spreadsheets