Windows, Doors & Conservatory Guides

Practical guides on costs, comparisons, common problems and building regulations, written by Certass-registered installers.

• Double Glazing Cost Guide: What Actually Drives Your Price — The seven variables that move a window quote up or down, and how to compare two quotes fairly.
• Composite Door Cost Guide — Where the money goes in a composite door, and which upgrades are worth paying for.
• Conservatory Roof Replacement: What Changes the Cost — Glass, solid and hybrid roof pricing, plus the structural checks that decide whether your frames can take the load.
• Garage Conversion Cost Guide — The hidden structural work that decides whether a conversion is straightforward or expensive.
• Bifold Door Cost Guide — Why panel count and threshold choice matter more than the headline width.
• Sash Window Replacement: Cost Factors — Why heritage detailing, not size, is what pushes a sash window quote up.
• uPVC vs Aluminium Windows — A straight comparison of sightlines, thermal behaviour, span capability and cost.
• Double vs Triple Glazing — When the third pane earns its money, and when better double glazing is the smarter spend.
• Composite vs uPVC Doors — Where the thicker composite slab earns its premium, and where a good uPVC door is the right call.
• Bifold vs Sliding vs French Doors — Three ways to open a rear wall, and how to choose between them for your room.
• Tiled vs Glass Conservatory Roof — How each roof type changes light, temperature and how often you actually use the room.
• Casement vs Flush Casement Windows — A small profile difference that changes the whole character of a façade.
• Misted Double Glazing: Why It Happens and What to Do — Failed seals, what can be replaced without changing the frame, and how to avoid a repeat.
• Draughty Windows: Diagnose Before You Replace — Five common causes, four of which are repairs rather than replacements.
• Why Your Conservatory Is Too Hot and Too Cold — and How to Fix It — The roof is usually the cause; here's the order to tackle things in.
• Condensation on Windows: What Each Type Means — Where the moisture is tells you whether you have a ventilation issue or a glazing failure.
• uPVC Door Won't Lock: How to Diagnose It — Most locking faults are alignment or gearbox issues, and both are identifiable in minutes.
• Conservatory Roof Leaks: Where the Water Really Gets In — The five leak points, in the order we check them.
• What Actually Happens on a Window Installation — Survey to certificate, including what you need to do on fitting day.
• Building Regulations for Replacement Windows and Doors — The five regulation areas that affect a replacement job, and who certifies the work.
• Window Energy Ratings and U-Values Explained — The difference between a glass figure and a whole-window figure, and why it matters when comparing quotes.
• Windows and Doors in Conservation Areas and Listed Buildings — Who decides what is acceptable, and the specification details that usually make the difference.
• Door and Window Security: What to Actually Specify — The specification lines that decide whether a door resists a determined attempt.
• The Home Survey: What We Check and Why — Why the survey, not the sales visit, is the point at which a price becomes reliable.
• Misted Unit Replacement: What Drives the Cost — When swapping the glass is the sensible fix, and when it's money spent on a frame that's already finished.
• Porch Cost Guide: Where the Money Actually Goes — Why two porches of the same size can be priced very differently, and which choices you control.
• Orangery Cost Guide: What You're Actually Paying For — The structural and finishing costs that separate an orangery quote from a conservatory quote.
• House Extension Cost Guide: What Moves the Price — The seven cost blocks in an extension quote and where homeowners are most often caught out.
• Aluminium Windows: What You're Paying the Premium For — The specification differences that justify an aluminium price, and the cases where they don't.
• French Door Cost Guide: Every Line in the Price — How width, side screens, threshold and locking spec change a French door quote.
• Home Improvement Finance: How It Actually Works — A plain-English explanation of glazing finance, with the questions worth asking before you sign anything.
• Aluminium vs uPVC Doors: An Honest Comparison — Where each material genuinely wins, and where the difference is mostly aesthetic.
• Orangery vs Conservatory: Choosing Between Them — The structural differences that decide comfort, cost and how the space actually gets used.
• Conservatory vs Extension: Which Should You Build? — A realistic comparison of cost, disruption and year-round usability before you commit either way.
• Garage Conversion vs Extension: Which Adds Space Better? — When converting the garage is the smarter buy, and when it costs you more than it gains.
• Glass vs Polycarbonate Conservatory Roof — How the two glazed roof options actually differ in use, and when neither is the right answer.
• Secondary Glazing vs Replacement Windows — Two very different solutions to the same complaints — and how to tell which one your property needs.
• Composite vs Timber Front Doors — The maintenance and heritage trade-off at the heart of this choice, explained without the sales pitch.
• Conservatory Condensation and Damp: Finding the Real Cause — How to tell condensation from a leak, and the fixes that address each.
• Sash Window Rattles and Draughts: What's Really Wrong — Diagnosing the common sash faults, and deciding honestly between repair and replacement.
• Window Hinge and Handle Problems — Why casement windows drop, stick or won't close flush, and what a proper repair involves.
• Sticking Doors and Dropped Hinges — The difference between a door that needs adjusting and a door that's finished.
• Slipped or Leaking Polycarbonate Roof Panels — The specific failure points on a polycarbonate roof, and how to judge repair against replacement.
• Mould Around Window Reveals: Why It Keeps Coming Back — Why cleaning mould off a reveal never works for long, and what actually changes the conditions.
• Noise Reduction Glazing for Busy Roads — What actually reduces traffic noise through a window, in order of effectiveness.
• Timber vs uPVC Sash Windows — How the two options compare on authenticity, upkeep and cost — and what your property may dictate.
• Planning Permission for Conservatories: What to Check — The questions to put to your local authority before you commit to a conservatory.
• Building Regulations for Garage Conversions — What building control expects, and why the floor and damp details decide the quality of the finished room.
• Building Regulations for Extensions: What's Involved — The inspection stages and technical areas that shape an extension programme and its cost.
• How to Choose a Glazing Installer — A checklist you can use on us and on every other quote you get.
• Glazing Guarantees Explained — The three different guarantees behind a window installation, and what each one does not cover.
• Installation Day: What to Expect — Practical preparation, what the day actually looks like, and what happens at handover.
• Landlord Glazing Responsibilities: A Practical Guide — The glazing-related areas that matter in rented property, and how to plan works around tenants.
• Do You Need Building Regulations to Replace a Conservatory Roof? — The honest answer is usually yes, and here is what that actually involves for you.
• How Long Does a Conservatory Roof Replacement Actually Take? — What happens on each day, and the four things that stretch a job beyond the estimate.
• Tilt and Turn Windows Explained — One handle, two hinge positions, and a set of practical consequences worth understanding before you order.
• Is Triple Glazing Worth It? — The cases where we recommend it, the cases where we tell customers to spend the money elsewhere.