hup! walls and the case for a modular house extension

Every modular house extension we build across Telford, Shrewsbury, Shropshire and the Walsall area starts with the hup! wall system, combining strong thermal performance with fast installation. It adapts to almost any layout, which makes it a genuinely flexible choice for a modular house extension.

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modular house extension in Telford
home extension with a brick finish in Shrewsbury

Patented Ultrapanel technology

The Ultrapanel system used within hup! walls combines timber, steel and high-performance insulation in a unique patented design. By combining the strength of steel, the versatility of timber and exceptional thermal efficiency, Ultrapanel creates a robust, highly insulated structure that minimises thermal bridging and delivers outstanding energy performance.

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modular house extension walls

Rapid construction

The rapid clip-fit technology used across hup! walls and roofs enables your new extension to be built up to five times faster than traditional construction. 

With installation possible in virtually any weather, a smaller extension can be built and made watertight in as little as 2–3 days, helping to avoid typical weather and scheduling delays.

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Light and slim

Because hup! walls are lightweight, they can often be installed on an existing suitable base as part of a modular house extension, where heavier brick and mortar construction may require a completely new foundation. Their reduced weight also makes the panels easier for installation teams to handle, helping to keep the build moving quickly.

The slimmer wall construction can also create 10–15% more usable floor space than a traditionally built brick extension, helping homeowners make better use of the footprint available.

modular hup! house extension

Energy Efficient

Thanks to the high proportion of super-insulation within each panel, hup! walls are 6% more energy efficient than a wall built to current Building Regulations.

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What shapes the price of your extension

What drives modular house extension costs?

Formula One Windows manages design, planning and build as one team, so several trade handovers disappear from the schedule entirely - a key factor when considering modular house extension costs.

hup! walls and roofs are manufactured off site to a fixed specification, helping to provide greater cost certainty once the build starts rather than allowing costs to creep upward as they can with a traditional extension.

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A orangery extension with hybrid roof in Walsall

hup! technology | A tested lifespan you can rely on

The patented Ultrapanel system carries a minimum 60-year life expectancy, awarded by the British Board of Agrément (BBA) following independent testing and assessment. It's not simply a figure we've come up with ourselves - the system has been independently tested and verified, giving you confidence in its long-term performance.

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hup! technology

The Ultrapanel technology at the heart of hup! is ground-breaking.

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hup! walls

hup! walls are the foundation of every modular house extension - energy efficient, fast to build and placed anywhere in your design.

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hup! roofs

hup! comes with four roof choices for complete design flexibility.

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3D render model of hup! extensions with brick finishes

Windows & doors

hup! is compatible with a huge selection of windows and doors.

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3D render model of hup! walls

Wall Finishes

Personalise your modular hup! extension with an external wall finish that truly reflects your style.

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Any questions?

We are proud members of the hup! partner network. Choose us as your trusted hup! experts

What are hup! walls constructed from?

hup! walls are made from a patented combination of timber, steel and insulation, manufactured under controlled factory conditions before reaching a Telford property. That process is what produces the consistent 0.17 wall U-value, and it becomes clearer once you see the materials in person.

Do hup! walls come with any formal backing?

Yes. hup! walls carry BBA approval, with Ultrapanel technology rated for a 60-year lifespan. That gives Telford homeowners an independently assessed performance standard behind the build, worth checking directly rather than assuming.

How does a hup! wall earn back its cost over time?

Because hup! walls hold a wall U-value of 0.17, they are five times more energy efficient than the average UK home. Lower heating bills gradually offset the upfront build cost over the years, and Formula One Windows sets that logic out plainly rather than burying it in small print.
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