When it comes to modern methods of construction (MMC), efficiency and precision are everything. As developers and timber-frame specialists look for smarter ways to reduce risk and compress build programmes, Eurocell’s InSite system, supplied and installed in Scotland by Pinefield Glass, has emerged as one of the most innovative solutions on the market.
InSite enables fully glazed, finished windows to be installed directly into timber-frame wall panels within the factory environment. Instead of arriving at site as loose units, windows are delivered already seated in the panel, protected, sealed and ready for final positioning. By shifting this work upstream, the system brings new levels of efficiency and quality control to the construction process.
How InSite streamlines timber-frame construction from factory to site
InSite has been designed with the realities of timber-frame construction firmly in mind. It offers a significant advantage to manufacturers who want a more controlled production process, as well as developers and homebuilders who are under increasing pressure to deliver homes faster without compromising safety or quality. It also supports construction companies working across timber-frame, off-site and modular projects, where predictability and repeatable precision are key. For anyone building with timber-frame wall panels, InSite provides a more reliable and streamlined way of delivering window installations.
Traditionally, windows are fitted only after the building structure is in place. This means installers are often working at height, contending with weather conditions, sequencing constraints and varying site environments. The quality of each installation depends heavily on site conditions, access and skill levels, which can introduce inconsistencies and delays, especially when multiple trades are working around each other.
InSite approaches the process differently. Windows are glazed, sealed and fixed into the wall panels on the factory floor, where controlled conditions ensure accuracy. Once the panels reach the site, installation becomes a much simpler operation: the panels are erected, the windows are pushed out from the inside to their final position, plumbed and levelled, then locked off and sealed. By relocating the most complex stages of installation to the factory, InSite reduces the time required on site, improves quality consistency and significantly enhances site safety by minimising working at height.
This shift has a profound impact on scheduling, risk management and labour planning. Without the need for window installers to work among other trades or wait for suitable weather, projects progress more smoothly and with fewer interruptions. The result is faster build programmes, safer working conditions and greater confidence in achieving uniform, high-quality installations across every plot.
Setting a new standard for safety, compliance and performance
Performance is central to the InSite system. It is the only window-in-panel solution for timber-frame construction that has been fully tested by Warrington Fire (part of Exova) to BS 476 Part 20. This testing confirms that, when all approved components are used together, the system prevents the spread of fire and smoke into or from the cavity. For developers and manufacturers, this provides a level of assurance that alternative systems simply do not offer.
Thermally, the system performs exceptionally well too.
When paired with Eurocell’s Logik or Modus profiles, InSite can achieve window U-values as low as 0.8, depending on the chosen glazing specification. This makes it suitable for projects where energy performance is a key priority, including those aiming for enhanced fabric-first efficiency. All components are designed to meet UK building regulations and are approved for use in accordance with NHBC guidance, ensuring compliance across fire, thermal and structural requirements.
Why InSite matters for the future of construction
As the construction industry continues to shift toward off-site manufacturing and modern methods of construction, systems like InSite are becoming increasingly important. They bring more certainty to the build process, help reduce the reliance on site-based labour, and support safer, more efficient delivery models. For developers and manufacturers working with timber-frame panels, the InSite approach offers a clear step forward.
Bryan Yule, managing director at Pinefield Glass explains, “InSite has genuinely changed the conversation around how windows should be installed in timber-frame construction. By moving installation into the factory, we’re not just improving efficiency – we’re improving quality, safety and predictability across the whole build. It’s a smarter system and it’s already proving itself across Scotland.” His perspective reflects what many in the industry are now recognising: factory-fitted window systems aren’t simply a convenience – they are a fundamental shift in how timber-frame projects can be delivered.
By combining Eurocell’s innovation with Pinefield’s technical expertise and manufacturing capability, the InSite system delivers real, measurable benefits: better safety, faster builds, improved performance and consistent quality from first fix to completion. It represents not just a new way of installing windows, but a meaningful evolution in how timber-frame homes are built.
If you’re considering InSite for a timber-frame or off-site construction project, explore our InSite window system to see how factory-fitted windows can improve safety, efficiency and build quality.