That slow release is why a stone terrace bedroom can feel airless at midnight. The walls are thick, the one window is small, and there is no cross-flow. Over the bed, a roof window adds a second opening at ceiling height. Heat slips out through the top while the small window below feeds in a cooler stream. In a room like this, a sash with a vent bar is useful, because it can be left a finger's width open overnight without a wide gap.
Working around old roofs
The roofs of older houses rarely match the drawings. Rafters sit at odd spacings, a chimney breast may be in the way, and the covering may be a patchwork of different tiles laid at different times. We go into the roof space and check the timber before suggesting a size. Where possible we choose a width that falls between two rafters, which keeps the structural changes small. The guide to VELUX size codes shows how the letter and number combinations map to real openings.
Consent and the council
In Mangotsfield, planning decisions come from South Gloucestershire Council. Some older buildings around the church and the former village centre may be listed or may sit within a conservation area, which can change what the council expects of a roof alteration. For an ordinary house in an ordinary street the position is simpler, and our planning guide sets it out. Where a house does have a listing or other protection, a quick call to the council saves a wasted visit. Our page on conservation rooflights covers the slim, flush units that tend to suit old stone and slate.
A back lean-to deserves a note of its own, because it is the part of an old terrace people use most. Many terraces gained a kitchen or bathroom extension at the back, with a shallow roof and not much headroom. A small flat rooflight over the kitchen worktop brings daylight into a room that was built dark, and an opening model gives the kitchen's steam a route skyward. Where it sits above the sink, an electric or solar opener is worth the thought, because it is out of reach of the hand.
The deepest rooms of a terrace may sit well away from any window. A hallway or landing with no glass at all can be lit by a sun tunnel, which carries daylight down a tube from the roof. A bathroom is the commonest candidate. Add a ventilation kit and the tube also moves a little air. The tube is narrow, so it fits where a full-size window never could, between joists and under a roof that has no spare attic. Daylight arrives through a sealed dome on the roof and a diffuser on the ceiling, and nothing on the wall changes.
Before any quote is agreed we look at what sits above and below the opening. In a stone terrace that can be a chimney flue, a water tank or a bedroom wall, and each one moves the window. Our aim is a position that works for the room first and for the roof second, with the cable, flashing and lining planned so the finish inside is neat once the scaffold has gone.
