The selection / Brands & custom options
Custom Steel Windows
Replacement windows.
Made-to-measure steel windows are a product category, not a single manufacturer. Compare slender sightlines and custom openings; the supplier and thermal construction are confirmed in the proposal.
Book a home visitAI-generated architectural illustration · Not a manufacturer product photograph or client project.
The specification / What matters
Slender sightlines. Precise construction.
01Frame & sash sightlines
Compare visible widths at perimeter frames, mullions and opening sashes. A steel label alone does not establish the proportions of the complete assembly.
02Thermal construction
Thermally broken and non-thermally broken systems differ. Request documentation and whole-window ratings for the specific system proposed.
03Masonry junctions
Agree frame depth, anchorage, drainage and perimeter flashing around the existing wall. Include glazing, finish and operating hardware in the specification.
The fit / A project-led selection
Your architecture.
Your window selection.
We select the most appropriate windows for each individual project, considering architectural character, measured openings, sightlines, glazing, performance requirements and budget.
First options to consider
- Historic Steel Casements
- Hope’s, Crittall, Brombal
These are starting points, not a fixed prescription or a claim of authorized dealership. The final manufacturer, product, availability and specifications are confirmed for your project before ordering.
Manufacturer references are for product discussion, not a claim of authorized dealership. Availability, dimensions, construction, performance and warranty terms are confirmed for the selected product before ordering.
Questions / Before you decide
A clearer choice.
Is Custom Steel Windows a manufacturer?
Here it describes a made-to-measure product category, not a single manufacturer. The actual supplier and system will be named in the written proposal.
Are custom steel windows always thermally broken?
No. Confirm the exact frame construction and published whole-window performance figures. Appearance does not establish thermal performance.
Historic-property review requirements depend on the property and proposed scope. Confirm them with the relevant local authority.
Continue exploring
Other window options.
Start with the house, not a sales pitch
A measured replacement proposal.
Speak with our historic window specialists.
Tell us your town and the windows you want to replace. We’ll discuss frame materials, glazing, manufacturer options and the installation scope.