Skylight and Rooflight Answers
Short, direct answers to the questions we hear at surveys, grouped by product.
Quick answers to start with
- Skylights in general How Often Should a Skylight Be Replaced?
- Roof lanterns Do You Need Planning Permission for a Roof Lantern?
- Flat roof rooflights Can You Put a Skylight on a Flat Roof?
- Roof windows Do You Need Planning Permission for a Roof Window?
- VELUX windows When Should a VELUX Window Be Replaced?
- Electric opening rooflights Can You Get a Skylight That Opens?
Skylights in general 3
- How Often Should a Skylight Be Replaced?Replace a skylight when it shows signs of failure, not by the calendar. Here is what to look for.
- Can You Put a Skylight in Any Roof?Which roofs can take a skylight or rooflight, and what the survey checks before we cut.
- How Long Does It Take to Fit a Skylight?How long fitting takes, how the days run, and what adds time before and after the fitting itself.
Roof lanterns 3
- Do You Need Planning Permission for a Roof Lantern?Whether a roof lantern needs planning permission, what changes the answer, and who to ask before you order.
- Are Roof Lanterns Worth It?What a roof lantern changes in a room, where it pays off, and where a flat rooflight does the job better.
- Roof Lantern or Flat Rooflight: Which Suits Your Extension?How a roof lantern and a flat rooflight differ in light, height, looks and fitting, and which suits your extension.
Flat roof rooflights 3
- Can You Put a Skylight on a Flat Roof?Yes, a flat roof can take a skylight. How it is built and which type suits your room.
- Do Flat Rooflights Need a Slope?Flat does not mean level. Why a rooflight needs a gentle fall and where that fall comes from.
- Flat Rooflight or Roof Lantern for a Small Extension?Choosing a flat rooflight or a lantern when the extension is small.
Roof windows 3
- Do You Need Planning Permission for a Roof Window?When a roof window needs planning permission, when it does not, and the checks that settle it.
- What Pitch Does a Roof Window Need?How roof pitch decides between a roof window and a flat rooflight, and how a low pitch is handled.
- Can a Roof Window Be Fitted From Inside?What can be done from inside, what needs roof access, and how we plan the work without a full scaffold.
VELUX windows 3
- When Should a VELUX Window Be Replaced?The signs that a VELUX window needs replacing, and how to judge a failing unit.
- How Long Does a VELUX Installation Take?How long a VELUX fitting takes, and what adds time to the job.
- Can a VELUX Window Be Made Bigger?When a VELUX window can be enlarged, and what the roof needs for it.
Electric opening rooflights 3
- Can You Get a Skylight That Opens?Yes. Opening skylights exist for pitched and flat roofs, by hand or by motor, and a survey shows which suits your room.
- What Is an Opening Skylight Called?Roof window, venting rooflight, vented lantern: what the trade calls a skylight that opens, and why the names differ.
- Do Electric Rooflights Close When It Rains?A rain sensor closes an electric rooflight when drops land on the glass. Here is how it works and what it needs.
Energy efficient rooflights 3
- What Are the Downsides of Skylights?The honest drawbacks of a skylight or rooflight, and what stops each one becoming a problem.
- Do Rooflights Lose Heat?Why a skylight loses more heat than solid roof, and how glazing, frame and fitting keep it small.
- Will a Rooflight Affect the Temperature of My Room?How a skylight changes room temperature through the year, and what keeps a room comfortable.
Misted rooflights 3
- Can Misted Rooflight Glass Be Replaced?Misted skylight glass can be replaced as a sealed unit. When the frame can stay, and when it cannot.
- Is a Misted Rooflight a Problem?A misted rooflight is a failed seal, not a hazard. What it costs you and when to act.
- Condensation on the Glass or Between the Panes?How to tell room-side condensation from a failed seal between the panes of a rooflight.
Walk-on rooflights 3
- Are There Skylights You Can Walk On?Yes: walk-on rooflights are structural glass you can stand on. What they are and where they fit.
- How Much Weight Can a Walk-On Rooflight Take?There is no single figure: a walk-on rooflight takes the load it was specified and rated for.
- Are Walk-On Rooflights Slippery?Smooth glass can be slick when wet, so outdoor walk-on rooflights get a grip finish. How it works.
Conservation rooflights 3
- What Is a Conservation Rooflight?A conservation rooflight is a slim, low skylight with a thin frame, made for period and protected roofs.
- Do Conservation Rooflights Need Planning Permission?When conservation rooflights need planning permission, and the three checks to make with the council first.
- Do Conservation Rooflights Sit Flush With the Roof?How low a conservation rooflight sits, why a small step remains, and what that means for the roof.
Sun tunnels 3
- What Is a Sun Tunnel?A sun tunnel is a light tube that carries daylight from a roof dome to a dark room below.
- How Much Light Does a Sun Tunnel Give?What sets sun tunnel brightness: tube size, length, bends, roof direction and room size.
- Is a Sun Tunnel the Same as a Roof Window?A sun tunnel delivers light only. A roof window gives light, a view and fresh air.
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