Case Studies | DH Frames | Windows, Doors & Conservatories

CASE STUDY 1:

Spectus Sash Window replacement Windmill Hill Case Study:

Upgrading Old uPVC Windows with Spectus Energy-Efficient Sash Windows

BACKGROUND

A semi-detached property built in the early 1980s still had its original uPVC windows. The units had yellowed, lost their seal, and provided poor insulation. The homeowners were facing rising energy bills, draughts, and windows that were increasingly difficult to operate.

OBJECTIVES

Replace failing windows with energy-efficient, low-maintenance alternatives.

Retain the property’s traditional sash-style appearance.

Improve security, thermal performance, and noise reduction.

SOLUTION: SPECTUS VERTICAL SLIDING SASH WINDOWS

The homeowners opted for Spectus Vertical Sliding Sash Windows, a modern system designed to combine traditional styling with advanced performance. Key features included:

A-Rated Double Glazing with argon-filled units and Low-E glass for superior thermal efficiency.

Multi-Chambered uPVC Frames to minimise heat loss.

Smooth-Glide Vertical Sliding Mechanism with optional tilt-in facility for easy cleaning.

Authentic Period Design with woodgrain foils to replicate the look of traditional timber.

Enhanced Security with reinforced frames and multi-point locking systems.

RESULTS

Energy Efficiency: The homeowners reported a 25–30% reduction in heating energy use within the first winter.

Improved Comfort: Draughts were eliminated, and rooms retained a consistent, comfortable temperature.

Noise Reduction: Traffic and street noise were significantly reduced.

Aesthetic Appeal: The traditional sash look was preserved, enhancing kerb appeal and property value.

Ease of Maintenance: The tilt-in function allowed for hassle-free cleaning and effortless operation.

HOME OWNER FEEDBACK

"The Spectus sash windows have transformed our home. They look like traditional timber sashes but with none of the maintenance. We’ve noticed a big improvement in warmth and a drop in our heating bills. The smooth sliding and tilt function make them so easy to use."

BEFORE

AFTER

CONCLUSION

By upgrading with Spectus Vertical Sliding Sash Windows, the homeowners achieved a perfect balance of style, performance, and practicality. The case demonstrates how modern sash solutions can maintain period aesthetics while delivering measurable improvements in energy savings, comfort, and security.

CASE STUDY 2:

Replacing Old Draughty Windows with REHAU Total 70 A-Rated Windows

BACKGROUND

A detached 1970s property was suffering from outdated, draughty windows that offered poor insulation and looked tired against the modernised interior. The homeowners were concerned about rising energy bills, lack of comfort during winter, and the dated white frames that no longer matched their design preferences.

OBJECTIVES

Eliminate draughts and heat loss.

Improve the home’s energy efficiency.

Upgrade the exterior look with a modern colour finish.

Ensure low maintenance and long-lasting performance.

SOLUTION: REHAU TOTAL 70 A-RATED WINDOWS

The old windows were replaced with REHAU Total 70 A-rated double-glazed windows in Anthracite Grey.

Key Features

Five-chamber profile for superior thermal insulation.

A-Rated glazing units with argon gas and Low-E glass.

Anthracite Grey foil finish for a contemporary look.

Slim sightlines to maximise natural light.

Multi-point locking systems for security.

Low-maintenance uPVC resistant to warping, rotting, and fading.

BEFORE & AFTER COMPARISON

Feature	Old Windows (1970s uPVC)	New Windows (REHAU Total 70 A-Rated)
Thermal Efficiency	Poor, draughty, single-glazed	A-Rated, five-chamber frames, Low-E glass
Appearance	Yellowed white, dated design	Anthracite Grey, sleek & modern
Comfort	Cold spots, heat loss, draughts	Warm, draught-free, consistent temperatures
Noise Insulation	Minimal sound reduction	Significant noise reduction
Security	Basic locks, ageing frames	Multi-point locking, reinforced structure
Maintenance	Frames discoloured, hard to clean	Low-maintenance uPVC, wipe-clean finish

RESULTS

Energy Performance: Noticeable reduction in heat loss, with lower heating bills reported.

Comfort: Draughts eliminated, creating a consistently warmer home.

Modern Aesthetic: Anthracite grey finish dramatically modernised the property.

Noise Reduction: External noise levels significantly reduced.

Maintenance-Free: No painting or staining required.

HOME OWNER FEEDBACK

"We couldn’t be happier with the REHAU windows. Not only do they look fantastic in anthracite grey, but the difference inside the house is incredible. The draughts are gone, the rooms stay warmer for longer, and our heating bills have already started to come down."

BEFORE

AFTER

CONCLUSION

The installation of REHAU Total 70 A-rated windows in anthracite grey delivered a stylish, energy-efficient, and secure upgrade. This project highlights how a simple replacement can make a measurable difference to both the comfort and kerb appeal of a property.

CASE STUDY 3:

Smarts heritage installation

BEFORE

AFTER

CASE STUDY 4:

Origin OB49 Aluminium Door with Origin OW80 windows, including building work, plastering etc

BEFORE

DURING

AFTER

CASE STUDY 5:

Replacing Old Timber Doors with Sleek Origin Bifold Doors

BACKGROUND

The property featured aged timber French doors that had become difficult to operate and costly to maintain. The frames had warped over time, the paint was peeling, and draughts were noticeable around the edges. The homeowners wanted to modernise their living space by improving access to the garden, bringing in more light, and creating an open, contemporary feel.

OBJECTIVES

Replace old timber doors with a stylish, low-maintenance alternative.

Maximise natural light and create a seamless connection between home and garden.

Improve thermal performance and weather sealing.

Add a modern design feature that would enhance both interior and exterior aesthetics.

SOLUTION: ORIGIN BIFOLD DOORS

The old timber doors were replaced with Origin aluminium bifold doors, chosen for their combination of sleek design, strength, and performance.

KEY FEATURES

Slim aluminium sightlines for maximum glass area and uninterrupted views.

Smooth bifolding mechanism allowing the doors to glide open effortlessly.

Thermally broken aluminium frames for excellent insulation.

Durable powder-coated finish in a contemporary colour (e.g., Anthracite Grey or Jet Black).

Secure multi-point locking system for safety and peace of mind.

Custom configuration to allow the doors to fold neatly to one side, maximising open space.

RESULTS

Indoor–Outdoor Living: The bifold design created a wide opening to the garden, perfect for entertaining and summer living.

Increased Light: Slim frames and large glazed panels flooded the living area with natural light.

Energy Efficiency: Thermally broken aluminium improved insulation and eliminated draughts.

Modern Aesthetic: The sleek, minimalist design of the Origin doors transformed the look of the property, inside and out.

Low Maintenance: Unlike timber, the aluminium frames will never rot, warp, or need repainting.

HOME OWNER FEEDBACK

"We love our new Origin bifold doors. They’ve completely changed the way we use the space — in the summer we just open them up and it feels like the garden is part of our living room. The design is so sleek, and we’ll never have to worry about repainting or maintenance again."

BEFORE

AFTER

CONCLUSION

By replacing the old timber doors with Origin bifold doors, the homeowners gained a solution that combines modern aesthetics, outstanding performance, and lifestyle benefits. The project highlights how a simple change can create a brighter, more open home while eliminating the upkeep issues of timber.