Beyond the ordinary The STRUCTURA Jargon Buster: Builder-Speak Translated

Construction has its own language. Unfortunately, some builders use it to confuse clients, hide costs, or avoid accountability.

A–Z of Common Construction Terms

 

 

At STRUCTURA, transparency is one of our core values. We believe you should always know exactly what is happening on your site, which is why we speak in plain English. To help you navigate your renovation with confidence, we’ve translated the most common (and most confusing) site jargon into real words.

Building Control (or Building Regs)

 

  • What it means: The local authority inspectors (or approved private inspectors) who ensure your build is legally compliant with structural, fire, and thermal safety standards.

 

  • The STRUCTURA Translation: The people who keep your house from falling down. Never try to bypass them.

CDM Regulations (2015)

 

  • What it means: The Construction (Design and Management) Regulations. This is UK health and safety law.

 

  • The STRUCTURA Translation: The law that states health and safety is ultimately the client's responsibility unless legally handed over to a Principal Contractor. We take this liability off your shoulders entirely.

DPC (Damp Proof Course)

 

  • What it means: A horizontal barrier built into the walls of a property to prevent ground moisture from rising through the brickwork.

 

  • The STRUCTURA Translation: The thin barrier that stops your beautiful new extension from turning into a mouldy sponge. If this gets breached during a build, you have a very expensive problem.

EICR (Electrical Installation Condition Report)

 

  • What it means: An official, heavily regulated document produced following a rigorous inspection of the electrical wiring and installations in a property.

 

  • The STRUCTURA Translation: The certificate that proves your house won't catch fire when you plug the kettle in. If your builder’s "sparky" cannot issue one of these upon completion, they are not qualified, and your home insurance is likely void.

First Fix

 

  • What it means: All the work that happens before the plasterers arrive. This includes structural work, pulling electrical cables through walls, and laying the main plumbing pipes.

 

  • The STRUCTURA Translation: The messy, invisible work behind the walls. You can't change your mind about where the sink goes after First Fix without blowing your budget.

Gas Safe Register

 

  • What it means: The official UK list of gas engineers legally qualified to work on gas appliances, boilers, and pipework (formerly known as CORGI).

 

  • The STRUCTURA Translation: Non-negotiable. If anyone touches your boiler without a valid Gas Safe ID card, they are breaking the law. At STRUCTURA, we vet every single engineer's credentials before they step on site.

Load-Bearing Wall

 

  • What it means: A structural wall that actively supports the weight of the building above it, such as the roof or the upper floors.

 

  • The STRUCTURA Translation: The wall you absolutely cannot knock down on a whim. Removing this requires structural calculations, heavy steel beams (RSJs), and Building Control sign-off.

Making Good

 

  • What it means: Repairing damage caused during the building process (e.g., patching up the plaster around a newly installed window).

 

  • The STRUCTURA Translation: A classic grey area in cheap quotes. Cowboy builders will leave your walls ruined because "making good wasn't in the quote." At STRUCTURA, finishing the job is always part of the contract.

O&M Manual (Operations & Maintenance)

 

  • What it means: A comprehensive handover file given to the client at the end of a project, containing all safety certificates, appliance warranties, plans, and maintenance instructions.

 

  • The STRUCTURA Translation: Your property's new instruction manual. We hand this over to you on the final day so you never have to guess what colour the paint was, where the fuse box is, or who to call if the boiler needs a service.

Party Wall Award

 

  • What it means: A legal agreement required if you are carrying out building work on, or close to, a wall shared with a neighbour.

 

  • The STRUCTURA Translation: A mandatory legal hoop. Ignore it, and your neighbour can legally shut down your entire site with an injunction.

Practical Completion

 

  • What it means: The point in a contract where the building work is complete enough for the client to take possession and use the space for its intended purpose.

 

  • The STRUCTURA Translation: The day you get your house back. The site is safe and functional, though a few tiny cosmetic touch-ups might still be needed.

Provisional Sum (or PC Sum)

 

  • What it means: An estimated allowance written into a quote for a specific piece of work that hasn't been fully designed or chosen yet (e.g., "£5,000 provisional sum for kitchen units").

 

  • The STRUCTURA Translation: The builder's blank cheque. Cowboy builders use low provisional sums to make their initial quote look artificially cheap, knowing you will have to pay thousands more later. We eliminate these by scoping your project properly before we start.

RAMS (Risk Assessments & Method Statements)

 

  • What it means: Health and safety documents detailing exactly how a high-risk task (like demolition or steel erection) will be carried out safely and legally.

 

  • The STRUCTURA Translation: Proof that your builders have actually planned how to take your roof off safely, rather than just turning up on a Monday morning with a sledgehammer and hoping for the best.

Retention

 

  • What it means: A percentage of the total contract value (usually 2.5% to 5%) that the client legally holds back for a set period (often 3 months on commercial projects) after the build is finished.

 

  • The STRUCTURA Translation: Your guarantee that the builder will actually come back to fix the snagging list. If a builder refuses to agree to a retention clause, do not hire them.

RSJ (Rolled Steel Joist)

 

  • What it means: A heavy steel beam used to support the structure of a building, usually required when knocking down load-bearing walls.

 

  • The STRUCTURA Translation: The massive, expensive piece of metal holding your upstairs bedrooms up after you create that open-plan kitchen.

Schedule of Works

 

  • What it means: A highly detailed, itemised list of every single task, material, and labour requirement needed to complete the project.

 

  • The STRUCTURA Translation: The master blueprint of your contract. If a builder gives you a single-page quote with just a final price at the bottom, you are paying for guesswork. Our schedules leave nowhere to hide.

Second Fix

 

  • What it means: Everything that happens after the plastering is finished. This includes fitting light switches, plug sockets, skirting boards, doors, taps, and the kitchen units.

 

  • The STRUCTURA Translation: The pretty stuff. This is when your building site finally starts looking like a home again.

Skimming

 

  • What it means: Applying a thin, final layer of fine plaster to a wall or ceiling to create a perfectly smooth finish ready for painting.

 

  • The STRUCTURA Translation: The magic touch that hides the rough brickwork and plasterboard.

Snagging

 

  • What it means: The process of identifying minor defects or unfinished pieces of work (e.g., a scratched door handle, a missing blob of sealant) at the very end of the project.

 

  • The STRUCTURA Translation: The final quality check. You should hold back a percentage of the final payment (a 'retention') until every single snag on the list is fixed.

Padstone

 

  • What it means: A high-strength concrete block placed under the end of a steel beam to spread the load across the masonry below.

 

  • The STRUCTURA Translation: Think of it like a snowshoe for your steel. It prevents the heavy beam from crushing the bricks underneath, stopping cracks before they start.

Trial Pit

 

  • What it means: A hole excavated next to a building’s foundation to inspect its depth, width, and the type of soil it sits on.

 

  • The STRUCTURA Translation: Building on facts, not guesswork. We insist on seeing the "feet" of the building to make sure your new extension has a firm footing.

Lateral Restraint

 

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  • What it means: Structural ties or straps that connect walls to floors and roofs to prevent them from bowing or leaning outward.

 

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  • The STRUCTURA Translation: Tying the whole house together. It’s the structural "hug" that keeps old Manchester terraces standing tall and perfectly straight.

 

Deflection

 

 

  • What it means: The degree to which a structural element (like a beam) bends under the weight of a load.

 

  • The STRUCTURA Translation: The "bounce" factor. All beams bend slightly, but we engineer yours so that the dip is invisible to the eye and won't crack your fancy new plaster.

The "Manchester Factor" (Ground Conditions)

 

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  • What it means: Assessing the soil type (e.g., Clay, Sand, Peat) to determine the type and depth of foundations required.

 

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  • The STRUCTURA Translation: The "Foundational Truth." Manchester clay is temperamental—it swells when wet and shrinks when dry. We don't guess; we design for the specific earth your house is standing on.

Build Over Agreements (The Invisible Pipes)

 

  • What it means: A legal agreement with the water authority (like United Utilities) required when building over or near a public sewer.

 

  • The STRUCTURA Translation: The "Drainage Detour." If your extension sits over a public pipe, we need permission to ensure you don't crush it. We handle the structural side so the water keeps flowing and your extension stays solid.

Variation Order

 

  • What it means: A formal, written document detailing a change to the original agreed scope of work, including how it impacts the price and the timeline.

  • The STRUCTURA Translation: Your financial safety net. If you or the builder change the plan, get it in writing. Never accept a verbal price change on-site.

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How to Use This Knowledge: The "Test Your Builder" Checklist

Knowing the jargon is only half the battle. The next time you are standing in your kitchen talking to a prospective contractor, use your new vocabulary to ask these four non-negotiable questions:

1. "Will you be providing a fully itemised Schedule of Works?" If they say no, or offer a single-page quote with a bottom-line figure, walk away. You cannot manage a budget without granular pricing.

2. "Do you agree to a formal Service Agreement or JCT Contract with a standard Retention clause?" If they say their "word is their bond" or refuse a retention (holding back 5% until snagging is finished), they are planning to leave before the job is truly done.

3. "Will you be assuming the role of Principal Contractor under CDM 2015?" If they look confused, they do not understand modern UK health and safety law, and they are leaving you legally liable for site accidents.

4. "Can I see your current Public Liability Insurance and Gas Safe/NICEIC registrations?" If they hesitate, make excuses, or say they will "bring it next time," do not let them start work.

Don't Want to Deal with the Jargon at All?

You shouldn't have to become a construction expert just to get your house extended. At STRUCTURA, we handle the contracts, the compliance, the trades, and the timelines so you don't have to.