Choosing new windows is not only about glass and colour. On Norfolk cottages, Suffolk village houses and Cambridgeshire brick terraces, the way the opening sash meets the outer frame changes how the house looks from the street and to planners. That detail is the difference between flush and non-flush (often called stormproof or lipped) casements. A flush casement sits level with its outer frame, so the face of the window is flat. A non-flush casement has a sash that sits proud of the frame, with a visible lip. Both can be warm, secure and low-maintenance. Amber surveys, supplies and fits both styles across East Anglia.
Langham IP31 – olive-grey timber-look PVC flush
On a red-brick Suffolk cottage front, tired timber casements were replaced with olive-grey timber-look PVC flush casements with Georgian bars. The flush face keeps traditional character without the paint-and-rot cycle.
Mulbarton NR14 duck-egg aluminium flush
Painted timber flush casements on a brick wing south of Norwich were replaced like-for-like with duck-egg blue aluminium windows in flush form. Slim sightlines and factory colour replace ongoing timber painting; planning approval was part of the job.
Welborne NR20 anthracite French flush
A renovated red-brick and flint farmhouse moved from mixed sage-green timber casements to anthracite French flush casements in the brick openings. The result keeps farmhouse character coherent without painted-timber maintenance.
When flush wins in East Anglia
Flush casements earn their keep where the elevation still carries traditional timber character – or where the brief is to keep that character without endless scraping and painting. Many Norfolk and Suffolk villages ask for replacements that sit quietly with brick, flint and clay pantiles. A flush face is closer to older timber casements than a deep stormproof lip.
Cottages, farmhouses and timber like-for-like replacements are the usual fit. Anthracite and other dark factory finishes on flush casements also suit renovated farmhouses that want one coherent frame colour. Non-flush still makes sense on modern streets, where planners have not asked for a flush face, or where you want maximum profile and hardware flexibility.
- The house is modern and the street already shows stormproof frames
- You want maximum profile and hardware flexibility
- Planners have not asked for a flush or timber-like face
- Budget and specification favour a well-proven stormproof PVC or aluminium system
There is no rule that every East Anglia home needs flush. The right call is the one that fits the elevation, the planning context and how you want the house to look in ten years.
What non-flush / stormproof casements are
Non-flush casements – also described as stormproof or lipped – have a sash that sits proud of the outer frame. A lip overlaps the outside of the frame. That overlap is a long-standing weather detail and is still the most common casement look on many UK homes.
Non-flush windows often offer a wide choice of frame profiles, colours and hardware. On modern estates, extensions and properties where planners do not ask for a timber-like face, they remain a practical, familiar choice. Amber’s full windows range covers flush and non-flush options so the survey can match the house.
PVC flush or aluminium flush?
Timber-look PVC flush suits many cottages and village houses where you want traditional colour and bars with low maintenance. Aluminium flush suits slim sightlines, stronger colours and like-for-like timber flush replacements. Neither is automatically better – survey decides. Quotes are fixed after a free home survey.
If you are weighing flush against non-flush for a Norfolk, Suffolk or Cambridgeshire home, book a free, no-obligation home survey from the Norwich showroom, or call 01603 672638. Browse flush casement windows and the wider windows range before you visit.