Glazed Windows

At ThermaWise, we specialise in supplying and installing an extensive range of premium window systems, engineered for performance, longevity, and design flexibility. Our carefully curated product portfolio includes Timber, uPVC, Aluminium, and Steel framed solutions—sourced from Europe’s most trusted manufacturers and tailored to meet the demands of both residential and commercial projects.

Whether you’re looking to restore a heritage home, enhance energy efficiency, meet fire safety regulations, or complete a high-end architectural design, ThermaWise provides the right glazing system with outstanding craftsmanship, certified performance, and complete peace of mind.

Timber Framed Windows
Traditional charm meets modern performance.
Our timber framed windows are ideal for clients seeking a natural, timeless finish without compromising on insulation or durability. Made using sustainably sourced hardwoods and softwoods, these products are a popular choice for conservation projects, period properties, and high-end residential developments.

• High-performance double or triple glazing for superior thermal and acoustic insulation
• Engineered timber frames for dimensional stability and strength
• Wide range of RAL colours, stains, and heritage-style finishes
• Optional traditional detailing: Georgian bars, sash horns, arched heads, and decorative beading
• Fully customisable sizing and opening styles
• Low-maintenance coatings to resist weathering and extend lifespan
• Excellent U-values, compliant with UK energy standard

Ideal for: Grade-listed buildings, character homes, boutique renovations, and eco-conscious projects.


uPVC Framed Windows
Affordable. Efficient. Low maintenance.
Our uPVC systems offer an ideal balance between cost-efficiency, performance, and design flexibility. Built using multi-chambered profiles, these windows enhance energy performance and reduce noise, making them a popular choice across both residential and commercial builds. 

• Multi-point locking systems for enhanced security
• Double or triple glazed units for optimal insulation
• Available in a wide range of colours and woodgrain-effect finishes
• Optional features: trickle vents, restrictors, internal blinds, and decorative glazing
• Weather- and UV-resistant for longevity with minimal upkeep
• Fully compliant with Document L (thermal performance) and Document Q (security) standards

Ideal for: New-build homes, extensions, apartment blocks, and budget-conscious renovations.


Aluminium Framed Windows
Strong, sleek, and built to last.
We supply and install a versatile range of aluminium framed systems, known for their strength, minimalistic aesthetics, and outstanding weather resistance. Ideal for contemporary architecture, commercial buildings, and high-end developments.

• Non-Fire Rated Aluminium Systems
• Slimline profiles for increased glazing area and natural light
• Thermally broken frames for improved energy efficiency
• Powder-coated in any RAL colour, metallics, or anodised finishes
• Compatible with a variety of window styles: sliding, casement, tilt-and-turn, pivot
• Lightweight yet robust for structural flexibility and ease of installation
• Fire Rated Aluminium Systems
• Certified fire resistance from 30 to 120 minutes, tested to EN 1364 and BS 476
• Frameless and slim profile designs available
• Suitable for use in escape routes, stairwells, corridors, and compartmentalised areas
• High clarity fire-rated glazing available with integrity and insulation ratings (EI30, EI60, EI120)
• Fully compliant with UK building and fire safety regulations

Ideal for: High-rise buildings, offices, schools, hospitals, retail units, and premium residential projects.


Steel Framed Windows
Unrivalled strength. Architectural excellence.
Our steel glazing systems deliver unmatched durability and slim, industrial-style aesthetics. Designed for both structural integrity and design impact, our steel windows are available in fire-rated and non-fire-rated options, offering a solution for even the most demanding projects.

• Non-Fire Rated Steel Systems
• Exceptionally strong with ultra-slim sightlines
• Custom-made to support large or unusual glazing formats
• Available in thermally broken or solid profiles
• Galvanised and powder-coated for long-term protection
• Ideal for loft conversions, warehouse conversions, and industrial-modern architecture
• Fire Rated Steel Systems
• Fire resistance up to 120 minutes, tested and certified to UK and European standards
• Provides integrity (E) and insulation (EI) ratings
• Suitable for high-risk areas requiring passive fire protection, such as stair cores and escape routes
• Maintains minimalist steel design while meeting fire compartmentation requirements
• Can be integrated into partition walls, curtain walling, and fixed screens

Ideal for: Commercial buildings, government facilities, hotels, high-end interiors, and protected structures.