Guides

Frameless flat rooflight, 1000 x 1000 mm, seen from inside
Skylights for kitchens: placement, size and light
Planning a flat rooflight for a kitchen or kitchen extension: where to place it, what size, one or several, and how to deal with heat and condensation. Read more...
Glass terrace under a slatted pergola roof
Louvred pergolas: a UK buyer’s guide
How louvred aluminium pergolas work, how they deal with rain, wall-fixed or free-standing, sizing, side screens and the planning rules to check. Read more...
Insulated glass units on the production line
Replacing misted double glazed units: how to measure
Why sealed units mist up, when you can replace the glass without the frame, and how to measure a replacement unit. Read more...
Insulated glass units on the production line
Replacing a conservatory roof with glass
Swapping polycarbonate for glass: which glass to use, weight and frame checks, solar control, building regulations and measuring. Read more...
Rooflight kerb diagram
Flat rooflight sizes: standard sizes and how to choose
Our 18 standard flat rooflight sizes, how a size relates to your kerb and roof joists, and how to choose the right one. Read more...
Rooflight kerb diagram
Do you need planning permission for a rooflight?
When a rooflight is permitted development in England, when you need permission, and why building regulations usually still apply. Read more...
A panel of glass on the rollers of a toughening furnace
Can you cut toughened glass?
No. Why toughened glass shatters if you cut it, how to tell whether a panel is toughened, and how to order glass so it arrives the right size. Read more...
Insulated glass line at the Seyhan Cam factory
Double or triple glazing: what the numbers mean
What is inside an insulated glass unit, what U-values and Low-E coatings mean, and when triple glazing is worth it. Read more...
Glass panels on racks at the Seyhan Cam factory
Toughened or laminated glass: which do I need?
Toughened and laminated glass compared: how each is made, how each breaks, where UK rules ask for safety glass and which to choose for doors, roofs, balustrades and windows. Read more...
Rooflight kerb diagram
How to measure for a flat rooflight
What to measure on the kerb, how to check it is square, how much the glass weighs, and what to send us before you order. Read more...
Toughening furnace at the Seyhan Cam factory
How toughened glass is made
How toughened glass is heated and cooled, why it is stronger, how it breaks, where UK rules ask for safety glass, and why it cannot be cut afterwards. Read more...