Technical resources. Written for people who specify.
U-Value vs Light Transmission vs Lux: What Actually Matters for Your Polycarbonate Roof
Most buyers confuse U-value, light transmission, and lux when specifying polycarbonate roofing. Here's what each actually measures — and why getting them mixed up leads to expensive mistakes.
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What Architects Should Ask Before Specifying a Polycarbonate System
A specification checklist for architects and consultants evaluating polycarbonate roofing and façade systems — covering UV protection, testing standards, panel geometry, and manufacturer credentials.
What Buyers Should Check: UV Ageing, Yellowing, and Long-Term Transparency in Polycarbonate Panels
Yellowing and hazing in polycarbonate roofing are not inevitable — they're the result of inadequate UV protection. Here's exactly what to check before you buy.
Common Polycarbonate Sheet Defects and What Causes Them
Oil canning, delamination, surface hazing, uneven cell walls — polycarbonate roofing defects have identifiable causes. Here's how to recognize them and what they mean for performance and longevity.
The Hidden Details That Make Polycarbonate Roofing Truly Leak-Proof
Most polycarbonate roof leaks don't come from the panels — they come from the details. Here are the installation elements that separate a watertight system from one that fails in its first monsoon.
Why 900mm Is the Right Width for Standing Seam Polycarbonate Roofing
Panel width directly affects wind performance, thermal movement, visual flatness, and long-term reliability. Here's why 900mm is the engineered standard for Coxwell standing seam systems.
How to Read a Polycarbonate Roofing BOQ Before You Quote
Before you price a polycarbonate roofing job, you need to know what's actually in the BOQ. Here's what experienced contractors check — and what catches out those who don't.
Polycarbonate Roofing Quotation Checklist for Contractors
A practical pre-submission checklist covering every cost element contractors miss when quoting polycarbonate roofing — material, labour, wastage, transport, scaffolding, drawings, and more.
Common Mistakes Contractors Make While Installing Polycarbonate Sheets
Wrong side up. Screws over-tightened. No expansion gaps. These are the most common polycarbonate installation mistakes — and every one of them is avoidable with the right knowledge.
Why the Cheapest Polycarbonate Sheet Can Become the Most Expensive on Site
The panel that saves ₹15/sqm on day one can cost ten times that in rework, replacements, and client disputes two years later. Here's how to calculate the real cost of cheap polycarbonate.
Multiwall vs Multicell vs Solid Polycarbonate: What Contractors Should Use Where
Understanding which polycarbonate product suits which application prevents mis-specification and callbacks. Here's a practical guide for contractors on when to use multiwall, multicell, or solid PC.
How Coxwell Helps Contractors Win Better Projects, Not Just Buy Sheets
Coxwell isn't just a polycarbonate supplier — it's a technical project partner. Here's the support contractors get: BOQ review, drawings, wind-load documentation, site training, and more.
Polycarbonate Roofing Installation: Step-by-Step Site Guide
A practical step-by-step site guide for installing polycarbonate standing seam roofing systems — from structure verification to final inspection, written for on-site installation teams.
What Contractors Should Ask Before Accepting a Skylight Job
Before you commit to a polycarbonate skylight installation, there are 12 questions you need answered. Span, slope, drainage, wind load, heat gain, access, and maintenance — all covered.
How to Avoid Leakage in Polycarbonate Roofing Systems
Polycarbonate roofs don't leak — bad installations do. Here's how contractors eliminate every common source of water ingress: slope, flashing, fixing, sealing, expansion, gutter junctions, and wall abutments.
Why Dry-Fix Systems Are Safer Than Sealant Details for Polycarbonate Facades
Silicone sealant on a polycarbonate façade is a maintenance liability, not a solution. Here's why dry-fix mechanical systems outperform sealant-based details on every metric that matters.
Recommended Lux Levels by Building Type: An Architect's Reference Guide
How much light does a classroom need? A hospital ward? A warehouse? This reference guide covers IES, CIBSE, and IS 3646 lux targets for every major space type — with an interactive table architects can actually use.
What Is Daylighting? The Concept Every Architect Needs to Understand
Daylighting is not just "letting in light." It is one of the most powerful tools in an architect's kit — with measurable effects on human performance, health, and energy consumption. Here's what the research actually says.
Glass vs Polycarbonate: The Honest Comparison Architects Should Make
Glass dominates architectural education. Polycarbonate is treated as a cheaper substitute. The real comparison is more nuanced — and in many applications, polycarbonate is the superior choice. Here's the evidence.
How Orientation Changes Everything: North, South, East and West Skylights Compared
The same skylight facing north, south, east, or west delivers completely different light quality, heat load, and design performance. Here's what every architect should know before placing an aperture.
Glare: Why Higher Light Transmission Does Not Mean Better Daylight
The instinct to maximise light transmission in a skylight is understandable — but often wrong. Glare, discomfort, and occupant-blocked skylights are the result. Here's how to specify for daylight quality, not just quantity.
How to Select a Polycarbonate System for a Daylighting Brief
Given a daylighting brief — a lux target, an orientation, a space type, a thermal budget — how do you select the right polycarbonate system? A step-by-step framework for architects.
Daylighting in Schools and Hospitals: The Evidence and the Design Approach
The research on natural light in schools and hospitals is among the strongest in building science. Here's what it shows, what it means for specification, and how to design daylighting systems that actually deliver the benefits.