Guide10 August 2026 · 2 min read
Do You Need Planning Permission for a Roof Light?
For most UK homes the answer is no — permitted development covers it. Here are the actual rules, the exceptions that catch people, and how bespoke sizing helps.
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Vant Glass Journal
Roof light advice, guides & news
Practical guides, design inspiration and product know-how for roof lights, roof lanterns and walk-on glazing — written by the team that manufactures them in Britain.
Guide
Guide8 August 2026 · 2 min read
What Does a Roof Light Cost in 2026? An Honest Pricing Guide
What actually drives the price of a made-to-measure roof light — size, glazing, glass options and range — and how to compare quotes without being misled.
Blog7 August 2026 · 2 min read
One Big Roof Light or Several Small Ones?
The daylight question every extension design has to answer. Drama versus rhythm, structure versus budget — and how bespoke sizing changes the maths.
Guide5 August 2026 · 2 min read
How Strong Is a Walk-On Roof Light?
The question everyone asks before standing on glass. What makes structural glazing structural, and what a walk-on unit is — and is not — designed to carry.
Guide4 August 2026 · 2 min read
Solar Control, Self-Cleaning, Frosted: Choosing Glass for a Made-to-Order Roof Light
The size gets the daylight in; the glass specification decides how the room feels in July. A plain guide to the options on every bespoke unit.
Guide3 August 2026 · 2 min read
The Upstand: The Most Important 150mm of Your Roof Light Project
Nine out of ten roof light problems trace back to the upstand, not the glass. What it is, how to build it right, and how it differs for frameless, framed and walk-on units.
Guide1 August 2026 · 2 min read
How to Order a Custom Roof Light Online in Five Steps
From measuring the upstand to the delivery lorry: the whole made-to-order process, step by step, including the mistakes that cost people a remake.
Guide31 July 2026 · 2 min read
Roof Light U-Values and Part L: A Plain-English Guide
What a U-value actually measures, what Approved Document L expects from roof glazing, and the questions to ask any manufacturer before you order.
Guide29 July 2026 · 2 min read
Lighting a Basement with a Walk-On Roof Light
Basement conversions live or die on daylight. A walk-on roof light set into a patio or lightwell turns the ground above the basement into its window.
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