Casement Windows: The Most Common Period Window Type, Frequently Got Wrong
The casement window — hinged along one vertical edge and opening outward, in contrast to the vertically sliding sash — is the single most widespread window type across British period housing. Victorian and Edwardian terraces, interwar semis, and rural cottages alike were overwhelmingly built with casement windows rather than sashes, particularly outside the grander Georgian and early Victorian properties where sash windows were the more prestigious and expensive choice.
Precisely because casement windows are so common, they are also among the most frequently replaced with poor-quality modern equivalents — homeowners and even some joinery suppliers treat the casement as a simple, undemanding window type that does not require the same precision as a sash window restoration. This is a mistake. Genuine period casement windows carry specific proportional and constructional details that are easy to get wrong and immediately obvious when they are.
The sightlines of a period casement — the visible width of the timber frame and glazing bars as seen from outside — are typically far slimmer than modern double-glazed casement replacements, which often use bulkier frame sections to accommodate sealed glazing units and modern hardware. Glazing bar patterns vary meaningfully by period and region: a Victorian casement frequently divides each opening light into multiple small panes using a fine glazing bar grid, while an Edwardian or interwar casement may use larger panes with fewer, bolder bar divisions, reflecting the era's move toward more glass and less subdivision. Getting this proportion wrong — too few panes, bars too thick, or a grid pattern inconsistent with the property's actual period — is one of the most common ways a casement window replacement undermines an otherwise well-maintained period facade.
Ironmongery matters just as much as the timber and glazing. Period casement windows used specific styles of stay (the arm that holds the window open at a chosen angle) and fastener that varied by era and region — a Victorian cockspur fastener looks and functions differently from an Edwardian or 1930s equivalent, and using the wrong style is a small detail that nonetheless registers as incorrect to anyone familiar with the property's actual period.
We build every casement window at Old English Doors to the specific proportions, glazing bar pattern, and ironmongery style the property's period demands — using slender, structurally appropriate timber sections rather than the bulkier profiles modern double glazing often necessitates, and selecting hardware that is genuinely correct for the era rather than a generic "period style" approximation.
We design and install bespoke timber casement windows across Nottingham, Leicester, Derby, Sutton Coldfield, Manchester, St Albans, Birmingham, Coventry, Wolverhampton, Northampton, Warwick, Solihull, and Worcester, for the substantial Victorian, Edwardian, and interwar housing stock that defines so much of these regions' residential character.
