Quick answers
Skylight and rooflight questions answered
Short, straight answers to the questions people ask about skylights and rooflights: costs, planning, Building Regulations, glazing and fitting.
Planning, cost and replacement 3
Answer · 4 min readHow Much Does It Cost to Replace a Skylight?What decides the cost to replace a skylight or rooflight in a Liverpool home: unit, size, glazing, access, the kerb and the…
Answer · 4 min readDo I Need Planning Permission for a Skylight?When a skylight or rooflight is permitted development and when it needs planning permission: how far it sits proud, side windows, flats…
Answer · 4 min readHow Long Does It Take to Fit a Skylight?How long fitting a skylight or rooflight takes, from order lead times to days on site, for roof windows, flat rooflights, lanterns…
Roof lanterns 3
From the roof lanterns service page
Answer · 4 min readHow Much Does a Roof Lantern Cost to Fit?What sets the price of a fitted roof lantern: size, frame, glazing, a new kerb or opening, access and the finish inside,…
Answer · 4 min readDoes a Roof Lantern Need Building Regulations Approval?When fitting a roof lantern is notifiable: a new opening in a flat roof, the support it needs, the 2.2 W/m²K rooflight…
Answer · 4 min readCan a Roof Lantern Be Fitted to an Existing Flat Roof?Fitting a roof lantern to an existing flat roof: checking the joists, cutting the opening, building the kerb and tying it into…
Flat roof rooflights 3
From the flat roof rooflights service page
Answer · 4 min readHow Much Does a Flat Roof Skylight Cost?What decides the price of a flat roof skylight or rooflight: size, fixed or opening, glazing, the kerb, the roof covering and…
Answer · 4 min readCan a Rooflight Go on a Felt or Rubber Flat Roof?Fitting a rooflight to a felt, EPDM rubber or GRP flat roof: how each covering is cut, dressed up the kerb and…
Answer · 4 min readWhat Fall Does a Flat Rooflight Need?Why a flat glass rooflight needs a fall so rain runs off, and whether that fall is built into the kerb, the…
Roof windows 3
From the roof windows service page
Answer · 4 min readHow Much Does It Cost to Fit a Roof Window?What moves the cost of fitting a roof window: new opening or swap, size, opening type, flashing, scaffold or fitting from inside,…
Answer · 4 min readDo I Need Planning Permission for a Roof Window at the Front?Whether a roof window on the front slope needs planning permission: permitted development, conservation areas and Article 4 directions.
Answer · 4 min readCan a Roof Window Be a Fire Escape Window?When a roof window can serve as a means of escape in a loft conversion, the sizes and heights Approved Document B…
VELUX windows 3
From the velux windows service page
Answer · 4 min readHow Much Does a VELUX Window Cost to Install?What sets the price of a fitted VELUX window: the size code, opening type, glazing, flashing kit, blinds or electric operation and…
Answer · 4 min readCentre-Pivot or Top-Hung VELUX: Which Should I Choose?Centre-pivot or top-hung VELUX window: headroom, the view, cleaning, furniture under the window and which one suits a loft escape.
Answer · 4 min readCan a VELUX Window Be Fitted From Inside?Whether a VELUX window can be fitted from inside the loft without scaffolding, when it can, and when roof access or a…
Electric and opening rooflights 3
From the electric and opening rooflights service page
Answer · 4 min readHow Much Does an Electric Opening Rooflight Cost?What sets the price of an electric opening rooflight: the unit, motor and controls, rain sensor, the electrician's work, the kerb and…
Answer · 4 min readDo Electric Skylights Close Automatically When It Rains?How the rain sensor on an electric skylight or rooflight works, how fast it closes, what happens in a power cut and…
Answer · 4 min readCan a Fixed Rooflight Be Swapped for an Opening One?Swapping a fixed rooflight for an opening one: whether the kerb and size can stay, wiring for an electric unit and what…
Energy efficient rooflights 3
From the energy efficient rooflights service page
Answer · 4 min readDoes a Rooflight Make a Room Colder in Winter?Whether a rooflight or skylight makes a room colder in winter: how much heat glass loses against the roof it replaces, and…
Answer · 4 min readHow Do I Stop a Rooflight Overheating a Room in Summer?Stopping a rooflight or skylight overheating a room in summer: solar control glass, orientation, opening units for venting and blinds.
Answer · 4 min readWhy Does My Rooflight Get Condensation on the Inside?Why condensation forms on the room side of a rooflight or skylight: cold glass edges, damp air from kitchens and bathrooms, and…
Misted rooflight replacement 3
From the misted rooflight replacement service page
Answer · 4 min readHow Much Does a Misted Rooflight Unit Cost to Replace?What decides the cost of replacing a misted rooflight or skylight sealed unit: glass size and spec, access, the frame, and whether…
Answer · 4 min readCan You Replace Just the Glass in a Roof Lantern?Whether one misted or failed glass panel can be replaced in a roof lantern, how panels are held, and when the whole…
Answer · 4 min readHow Long Do Rooflight Sealed Units Last?How long a rooflight or skylight sealed unit lasts, what shortens its life, and the signs that the seal has gone before…
Walk-on rooflights 3
From the walk-on rooflights service page
Answer · 4 min readHow Much Does a Walk-On Rooflight Cost?What decides the price of a walk-on rooflight or skylight: size, load rating, glass build-up, slip finish, the frame and the work…
Answer · 4 min readCan a Walk-On Rooflight Go in a Roof Terrace?Fitting a walk-on rooflight into a roof terrace or balcony: the deck build-up, falls, edge details, privacy and light to the room…
Answer · 4 min readIs Walk-On Glass Slippery When Wet?Whether walk-on rooflight glass is slippery when wet: anti-slip finishes, how slip resistance is measured and what suits a garden or terrace.
Conservation rooflights 3
From the conservation rooflights service page
Answer · 4 min readHow Much Does a Conservation Rooflight Cost?What decides the price of a conservation rooflight: size, steel or aluminium, glazing bars, glass, flush flashing into slate and roof access.
Answer · 4 min readDo I Need Listed Building Consent for a Rooflight?When a rooflight on a listed building needs listed building consent, why replacing like for like can still need it, and who…
Answer · 4 min readAre Conservation Rooflights Double Glazed?Whether conservation rooflights come double glazed, how they meet Part L while keeping slim frames, and when a planning officer may ask…
Sun tunnels 3
From the sun tunnels service page
Answer · 4 min readHow Much Does a Sun Tunnel Cost to Install?What sets the price of a fitted sun tunnel: tube diameter, rigid or flexible tube, length, roof covering, the ceiling diffuser and…
Answer · 4 min readDo Sun Tunnels Work on a North-Facing Roof?Whether a sun tunnel works on a north-facing roof: diffuse daylight, dome design, tube size and what to expect on a grey…
Answer · 4 min readCan a Sun Tunnel Be Fitted to a Flat Roof?Fitting a sun tunnel to a flat roof: the flat roof flashing or upstand, tying into felt or EPDM, and light into…
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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.