The short answer
Yes, some opening rooflights are made for roof access, but only those designed and sold for it. Standard roof windows and ventilating rooflights are not access hatches, and they should not be used as one. If you need to step out onto a roof for maintenance, we specify an access hatch or an access rooflight and plan the safe route around it.
Access is a purpose-built product
A roof access rooflight is a different product from an ordinary opening rooflight. An opening rooflight, such as a roof window, is made to let air in and light through. An access hatch, by contrast, is built with a frame, a hinge and a lock that can take a person climbing through. It is designed for that load and that movement, and it is supplied with a secure stay to hold the lid open.
So when someone asks whether an opening rooflight can give roof access, the right answer is that the right type can. The wrong type should not be asked to do it. We choose the product to match the job, and we check the maker's information for the intended use before we put it on the quote.
Types of roof access rooflight
Several designs cover the usual situations.
- A roof access hatch for a flat roof, with a lid that hinges up and a ladder or stair below.
- An access rooflight in a pitched roof, which opens wide enough to step out onto a flat area or a parapet.
- A walk-on rooflight, where the glass itself is specified to carry a person, chosen by the manufacturer's stated load rating.
- A roof terrace door onto an approved terrace, which normally needs planning permission and guarding.
For walk-on glass, we specify by the maker's stated load rating, and we match it to how the roof will be used. A rooflight that is simply visible from the garden has different demands from one that people will cross on foot.
Planning the safe route
The hatch is only part of the picture. Getting onto a roof raises a safety question that the hatch alone does not answer. A flat roof with no edge protection is a fall risk, and a sloping roof is worse. Before we fit an access rooflight, we look at where the person goes after they climb out.
- The area they step onto should be flat, stable and clear of loose coverings.
- There should be edge protection, such as a parapet or a guard rail, if they will go near the edge.
- Anyone using the hatch should have a safe way to reach it, such as a fixed ladder or a stair.
- The lid should be held open securely, so it cannot fall on someone using it.
If the roof will be used for regular maintenance, we talk about anchor points and the work required to make them safe. Fall protection belongs in the plan from the start, not after the hatch has gone in.
Access is not escape
An access hatch and an escape window are separate things. Under Approved Document B, an escape window serves only storeys within about 4.5 m of the ground. A loft conversion on a two-storey house needs a protected stair, not an escape roof window. So an access rooflight does not replace a means of escape, and a rooflight chosen for escape does not give general roof access. We keep the two apart in the design and on the quote.
Planning permission and Building Regulations
An access hatch or a lantern-style access rooflight often stands up from the roof surface. Class C permitted development covers most rooflights that sit low on the roof, within the limits in our planning guide. A unit that rises further is assessed differently. Flats and maisonettes sit outside householder permitted development, and some councils withdraw those rights by direction or condition. Our planning guide covers the details.
A new opening in the roof is building work and is notified to Building Control. Swapping a whole rooflight unit is notifiable too, and the new one must satisfy Part L. We take care of the Building Control notification.
Questions to settle before you order
A short conversation at the survey saves a great deal later. Think about who will use the hatch and how often, what they will carry through it, where the ladder or stair will stand and what the roof covering is like on the other side. A hatch used once a year to clear a gutter asks for less than one used every week to reach plant or a solar array. Tell us the purpose, and we recommend a unit and a route to match.
Powered and manual access units
An access hatch can be manual, with a lift-and-stay arrangement, or it can have a motor. A powered hatch is helpful where the lid is heavy, where the hatch is high above a ladder or where the person using it has limited strength. If you want a motorised unit, see manual or electric opening rooflights for how the two compare, and note that mains connection is an electrician's job.
How we fit and finish an access rooflight
We begin with a free survey, in which we look at the roof, the room below and the route to the hatch. You receive a fixed written quote that names the unit, the supporting work and the finish. The hatch is then installed with its flashing and seals finished on the roof, and the reveal inside is splayed as far as the roof depth allows, then plastered and made good. Our 10-year workmanship guarantee covers the installation. For the full range of units, see our page on electric opening rooflights.
