Guides
Rooflight and skylight guides
Guides to choosing, sizing, fitting and replacing rooflights and skylights, grouped by service, written for homeowners planning the job.
Planning, cost and replacement 2
Guide · 9 min readReplacing a Skylight or Rooflight: The Whole JobWhat replacing a skylight or rooflight involves: the survey, like-for-like or a new size, stripping out, a new kerb and flashing, and…
Guide · 9 min readRooflights and Building Regulations in England and WalesWhich Building Regulations apply when you add or replace a rooflight or skylight: structure, heat loss, fire and safety glass, and who…
Roof lanterns 2
From the roof lanterns service page
Guide · 9 min readRoof Lantern Sizes: Matching the Lantern to the RoomHow to size a roof lantern for your extension: room proportions, kerb and upstand sizes, internal against external dimensions and what the…
Guide · 9 min readAluminium or uPVC Roof Lantern: Choosing the FrameAluminium or uPVC roof lantern: sightlines, strength, heat loss, colours and how each frame copes with wind and rain off the Irish…
Flat roof rooflights 2
From the flat roof rooflights service page
Guide · 9 min readFlat Rooflight or Roof Lantern for a Rear ExtensionFlat glass rooflight or roof lantern for a kitchen extension: light, headroom, sightlines, cleaning, cost drivers and how each looks from the…
Guide · 9 min readKerbs and Upstands for Flat Roof RooflightsWhy the kerb decides whether a flat roof rooflight stays dry: upstand heights, insulated kerbs, builder or factory kerbs and the tie-in…
Roof windows 2
From the roof windows service page
Guide · 9 min readRoof Windows for Loft Conversions: Positions and HeadroomPlanning roof windows into a loft conversion: where they go, sizes that suit the rafters, sill and head heights, headroom and light…
Guide · 9 min readRoof Windows in Slate and Tiled Roofs: Flashings ExplainedHow a roof window is flashed into Welsh slate, plain tile or interlocking tile, standard or recessed, and why the flashing choice…
VELUX windows 2
From the velux windows service page
Guide · 9 min readVELUX Window Sizes and Codes ExplainedHow to read a VELUX size code: the letter gives the width and the digits the height. Common sizes, matching an old…
Guide · 9 min readReplacing an Old VELUX Window With a New OneSwapping an old VELUX window for a new one: matching the size code, renewing the flashing, newer glazing options and keeping the…
Electric and opening rooflights 2
From the electric and opening rooflights service page
Guide · 9 min readElectric, Solar or Manual Opening Rooflights ComparedElectric, solar and manual opening rooflights compared: wiring, controls, reach, rain sensors and which suits a high ceiling or a loft.
Guide · 9 min readOpening Rooflights for Kitchen Extension VentilationHow an opening rooflight ventilates a kitchen extension: warm air out at the top, where to place it, and how it fits…
Energy efficient rooflights 2
From the energy efficient rooflights service page
Guide · 9 min readRooflight U-Values and Part L: The Figures That ApplyThe U-values a new or replacement rooflight must meet: 1.4 W/m²K for roof windows and 2.2 W/m²K for rooflights in England, and…
Guide · 9 min readDouble or Triple Glazed Rooflights: Which Is Worth It?Double or triple glazed rooflights and skylights compared: heat loss, weight, light through the glass, noise from rain and when triple glazing…
Misted rooflight replacement 2
From the misted rooflight replacement service page
Guide · 9 min readWhy Rooflight Glass Mists Between the PanesWhy a rooflight or skylight mists between the panes: a failed edge seal, spent desiccant, age and movement, and why the mist…
Guide · 9 min readNew Glass or a New Rooflight: How to DecideWhether a misted rooflight needs only new sealed glass or a whole new unit: the frame, the kerb, the age of the…
Walk-on rooflights 2
From the walk-on rooflights service page
Guide · 9 min readWalk-On Rooflights: Load Ratings and Glass Build-UpsHow walk-on rooflight glass is specified: load ratings, laminated layers, the bearing on the frame and what a domestic walk-on unit is…
Guide · 9 min readWalk-On Rooflights Over Basements and LightwellsWalk-on rooflights over basements, cellars and lightwells: getting daylight below ground in terraced houses, drainage around the glass and access.
Conservation rooflights 2
From the conservation rooflights service page
Guide · 9 min readRooflights in a Conservation Area: Planning and Article 4Fitting a rooflight in a conservation area: when permitted development still applies, Article 4 directions, front slopes and what planners look for.
Guide · 9 min readConservation Rooflight Design: Profiles, Bars and Flush FittingWhat makes a conservation rooflight: a low profile that sits flush with slate, a central glazing bar, slim steel-look frames and the…
Sun tunnels 2
From the sun tunnels service page
Guide · 9 min readSun Tunnel or Rooflight: Which Suits a Dark Room?Sun tunnel or rooflight for a dark room: how much light each gives, where each can go, the roof work involved and…
Guide · 9 min readSun Tunnel Routes: Lengths, Bends and Light OutputHow the route of a sun tunnel affects the light: rigid and flexible tubes, length, bends, the diffuser and getting through a…
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What happens next: we arrange a survey at a time that suits you, measure the roof and the room, then send a fixed written quote. Nothing is booked until you say yes.