Business Details
39 Years
experience
Expert Home Improvement Services in Grantham
Established in 1987 by Daryl Longman, Belvoir Windows has grown from a local enterprise into a trusted name in home improvement solutions. Our family-run business transitioned leadership to Jake Longman in 2023, who continues our commitment to quality and customer-centric service. As independent fitters, we prioritise meticulous attention to detail, ensuring every project meets exacting standards while maintaining open communication throughout the process. We reject high-pressure sales tactics, offering transparent advice tailored to individual needs, whether for modernising existing properties or crafting bespoke new builds. Our team combines decades of experience with a passion for precision, delivering durable, aesthetically pleasing installations.From initial consultation to final execution, we maintain a friendly, professional approach, backed by guarantees on materials and workmanship. Specialising in windows, doors, conservatories, and fascias, we serve residential clients across Lincolnshire, blending traditional craftsmanship with modern innovation. Our reputation rests on consistent delivery of value-driven solutions, ensuring client satisfaction remains paramount. By focusing on quality over quantity, we ensure every project reflects our dedication to excellence and long-term customer relationships.
Services
Double Glazing
Conservatories
Bi-fold Doors
Fascias
Sash Windows
Skylights
Replacement Panes
Garden Rooms
Warm Roof Conversions
Secondary Glazing
Details
- Year established: 1987
Highlights and features
- Family-owned since 1987 with hands-on management
- No high-pressure sales tactics or quotas
- Personalised service for residential and heritage properties
- Guaranteed workmanship using premium materials
- Experienced team specialising in complex installations
Services
Double Glazing
Upgrade your home's energy efficiency with our custom double glazing solutions. We install high-performance units in uPVC, aluminium, or timber frames, reducing heat loss and noise pollution while enhancing security. Our systems comply with current building regulations and are tailored to match property aesthetics, from modern homes to period buildings. Each installation includes expert fitting and after-sales support.
Conservatories
Create additional living space with our bespoke conservatories and garden rooms. We design and build structures using premium materials, including thermally efficient roofs and low-maintenance frames. Options include Victorian, Edwardian, and modern styles, all featuring weatherproof construction and seamless integration with existing architecture. Projects include full project management from planning to completion.
Bi-fold Doors
Transform your home with space-saving bi-fold doors that merge indoor and outdoor areas. Available in aluminium or uPVC with slim sightlines, our systems offer excellent thermal performance and security. We handle precise measurements, structural support requirements, and professional installation to ensure smooth operation and aesthetic harmony with your property's design.
Fascias
Enhance your property's exterior with durable fascia and soffit installations. Our low-maintenance uPVC systems replace rotting timber boards, improving aesthetics while protecting roof edges from weather damage. We offer colour-matched options and complete fitting services, including ventilation solutions and guttering integration for long-lasting functionality.
Sash Windows
Preserve historical character with our authentic sash window replacements. We supply and install heritage-compliant units featuring modern double glazing within period-appropriate timber or uPVC frames. Each solution maintains original design elements while improving thermal efficiency and security, ideal for conservation areas and listed buildings requiring planning permission compliance.
People
Daryl Longman
Founder
Established Belvoir Windows in 1987, bringing over 35 years of industry experience. Pioneered the company's commitment to quality craftsmanship and customer-focused service before handing leadership to his son Jake in 2023.
Jake Longman
Managing Director
Took over daily operations in 2023, continuing family tradition while introducing modern efficiency improvements. Oversees project management and client relations, ensuring continued adherence to the company's core values of quality and transparency.
Questions
What services does Belvoir Windows offer?
We specialise in double/triple glazing, bi-fold doors, conservatories, warm roof conversions, sash windows, skylights, fascias, and replacement panes for residential properties.
Are your installations guaranteed?
Yes, all our conservatories and glazing products come with guarantees covering materials and workmanship for added peace of mind.
Do you work on listed buildings?
Yes, we have experience installing period-appropriate windows and doors in Grade-listed properties while maintaining historical accuracy.
How long does a typical installation take?
Project duration varies by complexity, but most window/door installations complete within 1-3 days, with conservatories taking 2-4 weeks.
Can you help with planning permissions?
We advise on permitted development rights and handle necessary documentation for conservatory and extension projects.
