Structural Steelwork for Lake District House Extension: Lantern Skylight and Leg Framework
J Johnstone Engineering recently completed a bespoke steel fabrication and installation project for a stunning house extension in the Lake District. This build included precise steelwork to support a lantern skylight — a beautiful architectural feature that floods the space with natural light — alongside a custom leg framework designed to provide robust structural support without compromising on aesthetics.
Combining Function and Style in a House Extension
Lantern skylights add a striking focal point to any extension, but they demand carefully engineered steel support to handle roof loads while allowing maximum daylight into the interior. For this project, we fabricated steel beams and a leg framework that perfectly aligned with the architect’s design, ensuring the lantern was both structurally sound and visually seamless.
Project Highlights:
- Location: Lake District, Cumbria
- Scope: Structural steel for house extension
- Steelwork: Custom-fabricated steel beams and leg framework supporting the lantern skylight
- Finish: Protective primer coating applied for durability
- Standards: Fully compliant with EN1090 Class 2 certification
Precision Fabrication and Installation
Our workshop in Cumbria handled the fabrication with meticulous attention to detail, cutting and welding steel components to exact specifications. Once delivered to site, our installation team carefully positioned and secured the steelwork, working alongside builders and architects to ensure smooth integration with the surrounding structure.
Why Steelwork is Essential for Skylight Support
Lantern skylights require steel frameworks because:
- Steel provides exceptional strength with minimal bulk
- It can be fabricated into custom shapes for unique architectural features
- It supports large glass panels and roofing loads safely
- It offers durability and long-term stability, essential in Lake District’s variable weather
Local Expertise in the Lake District
We’re proud to support projects throughout Cumbria’s beautiful Lake District, from house extensions to new builds. Our experience working with local builders and self-builders means we understand the importance of quality, compliance, and timely delivery — no matter how complex the steelwork.

