Colin's Sash Windows

We design, supply and install bespoke double glazed sash windows tailored to each property. Choose from uPVC, timber or thermally broken aluminium, all made to measure and tested for energy efficiency. Our windows combine authentic detailing with modern security and PAS 24 options. Every installation is completed by accredited professionals and supported by comprehensive guarantees and aftercare.

At Colins Sash Windows, we supply an extensive selection of high-quality casement windows, combining refined design with energy efficiency and security. Our range includes uPVC, aluminium, flush, heritage and bespoke timber options, each crafted to suit both traditional and contemporary properties. Designed to provide excellent ventilation, a secure seal and unobstructed views, our casement windows deliver lasting performance at competitive prices.

At Colins Sash Windows, we design and install made-to-measure secondary glazing that fits neatly inside your existing windows, preserving their original appearance while enhancing performance. Our high-quality aluminium frames and extensive glass options, including Low E, laminated and toughened units, deliver up to 65% improved thermal efficiency and 80% noise reduction. Suitable for listed and heritage properties, our discreet systems provide enhanced security, reduced condensation and certified insulation, all expertly manufactured in the UK.

We supply premium aluminium bi-fold doors that seamlessly connect your home to the garden. Combining classic sightlines with modern engineering, slim frames maximise glazing and natural light even when closed. Built with security and energy efficiency in mind, they meet current building regulations and come in a wide range of finishes. Configurable sizes and panel options ensure a tailored fit.

We supply integral blinds seamlessly enclosed within the glass units of our casement windows, French doors and bifold doors, delivering a refined and practical glazing solution. Encased within double or triple glazing, they enhance thermal efficiency while reflecting up to 70% of solar heat. Our range includes Venetian, pleated and blackout options, each operated manually or electrically, ensuring effortless control, privacy and lasting performance without exposed cords.

We provide a comprehensive range of external doors designed to enhance security, energy efficiency, and visual appeal. Our selection includes composite, uPVC, aluminium, bi-fold, French, patio, and heritage styles, allowing you to achieve the ideal balance of durability and design. Each door is crafted to deliver reliable insulation, robust locking systems, and long-lasting performance. With tailored configurations, finishes, and glazing options available, we ensure every installation complements your property while adding measurable value and protection.

At Colins Sash Windows, we supply and install internal doors that shape the flow, privacy, and character of your home. Our collection includes timber, aluminium, glass, steel, sliding, bifold, fire-rated FD30, and made-to-measure options, ensuring suitability for every interior. We carefully consider material, functionality, insulation, sound reduction, and design to deliver doors that combine durability, safety, and refined aesthetics.

We transform your homes entrance with expertly engineered composite doors for discerning UK homeowners. Each design delivers strong security, thermal efficiency, and long-term durability through robust multi-layered construction. Our collection includes front, back, stable, aluminium, solid core, and FD30-rated fire doors, all manufactured to meet UK regulations. With minimal maintenance, they provide energy efficiency and lasting kerb appeal.

At Colins Sash Windows, we design and install bespoke French Doors that combine timeless elegance with modern performance. Our double-door systems maximise natural light, enhance ventilation, and create a seamless connection between your home and garden. Available in uPVC, timber, aluminium, flush, and heritage styles, each door is made to measure for lasting durability, energy efficiency, and dependable security.

At Colins Sash Windows, we craft aluminium roof lanterns that transform interiors with outstanding natural light. Each system combines slim yet strong 40mm aluminium rafters with advanced thermal performance and high-specification glazing. Low-E solar control coatings, argon-filled units and self-cleaning glass come as standard for comfort and reduced maintenance. Available in flat, pitched or bespoke designs.