Business Details
42 Years
experience
Trusted Window & Door Contractors in Croydon
At Cosyseal Double Glazing Double Glazing, we have dedicated over three decades to delivering exceptional double glazing installation and repair services to Housing Associations across London and the Home Counties. Our expertise in reactive and planned window and door projects is rooted in a commitment to quality, evidenced by accreditations from ConstructionLine, CHAS, EXOR SAFEContractor, FENSA, and ISO 14001. We prioritise long-term partnerships with clients, having maintained relationships for over 15 years, underpinned by core values of integrity, environmental responsibility, and community engagement.Our team invests in continuous training and development to ensure technical excellence, while our environmental policy focuses on local sourcing, recycling, and a target to achieve carbon neutrality by 2025. We believe in creating value beyond contracts, fostering stronger communities through apprenticeships, local projects, and a customer-centric approach that has defined our reputation since 1984.
Services
Window Replacement
Window Repairs
Door Installations
Secondary Glazing
Maintenance Contracts
Details
- Year established: 1984
Highlights and features
- We have over 30 years of experience in social housing window and door projects.
- Our ISO 14001 accreditation demonstrates environmental management excellence.
- We fund local community projects and employ apprentices from the areas we serve.
- Our materials are sourced locally, with 100% recycling of wood, glass, and uPVC.
- We maintain 15+ year partnerships with Housing Association clients through reliability.
Associations and certifications
- ConstructionLine
- CHAS
- EXOR SAFEContractor
- FENSA
- ISO 14001
What people say
Exceptional service
Reliable partners
Community-focused
Technical expertise
Long-term relationships
Services
Window Replacement
We deliver planned window replacement projects for Housing Associations, combining technical expertise with a commitment to social value. Our installations enhance energy efficiency, security, and comfort while adhering to strict quality standards. We prioritise local sourcing and recycling to minimise environmental impact.
Window Repairs
Our reactive window repair service addresses urgent issues promptly, restoring functionality and safety. With rapid response times and skilled technicians, we ensure minimal disruption to residents while maintaining long-term durability and performance standards.
Door Installations
We provide comprehensive door installation services, including security upgrades and energy-efficient solutions. Our work meets exacting safety standards while improving aesthetics and thermal performance for social housing clients.
Secondary Glazing
Our secondary glazing systems reduce noise pollution and improve thermal insulation without replacing existing windows. This cost-effective solution is ideal for preserving heritage buildings while enhancing comfort and energy efficiency.
Maintenance Contracts
We offer tailored maintenance contracts to ensure long-term performance of windows and doors. Our proactive approach includes inspections, repairs, and cleaning to extend product lifespan and maintain safety standards for housing providers.
Questions
What services does Cosyseal Double Glazing Double Glazing Double Glazing offer?
We specialise in window and door replacement, repairs, secondary glazing, and maintenance contracts for social housing providers across London and the Home Counties.
How does Cosyseal Double Glazing Double Glazing contribute to social value?
We fund local community projects, employ apprentices from served areas, and prioritise local suppliers to create employment opportunities and strengthen communities.
Are your materials environmentally sustainable?
Yes. We source materials locally, recycle 100% of wood, glass, and uPVC, and aim to achieve carbon neutrality by 2025 through our ISO 14001-certified environmental policy.
What accreditations do you hold?
We are accredited by ConstructionLine, CHAS, EXOR SAFEContractor, FENSA, and ISO 14001, reflecting our commitment to quality, safety, and environmental management standards.
How long have you served the housing sector?
Since 1984, we have provided window and door solutions to Housing Associations, maintaining partnerships with some clients for over 15 years.
Reviews (5)
Janice R.
Oct 17, 2021
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Exceptional service by the team. Despite prevailing conditions, Cosyseal has managed to provide prompt and effective repairs. Highly recommend their service
Kay Best
Sep 07, 2021
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Had windows and doors changed yesterday. Had a brilliant service right from the beginning. We were phoned every couple of weeks once ordered to give us an update. 2 men arrived yesterday. Everything was covered with dust sheets and even though there was obviously things to clean afterwards care and attention was made as best as it could of been whilst fitting. The weather was awful and they got soaked at one point but carried on regardless without hesitation or any breaks. Nothing was to much trouble for them. They stayed later than expected to make sure works were complete in one day. Were extremely
Fatima Bibi Hanif Pandor
Jul 02, 2021
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One word to describe this company. TERRIBLE. My window has been cracked in my apartment for over 3 months. They have continuously cancelled my appointments for repairing my window, their customer service has been atrocious and I have had the worst experience I could have imagined. All this while being unable to live in my apartment because its on the 4th floor and I have a 3 year old child who could fall out of the window at any moment because the window is damaged. Avoid at all costs
Mason Wilks
Mar 15, 2021
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Amazing service, the engineer came 30 minutes early and called to see if he was ok to attend. Carried out the repairs with minimal noise or mess and was very professional. Have recommended to a handful of people and they have all been pleased also. Fantastic company!!
Miss J.
Oct 17, 2020
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We used Cosyseal for new exterior doors for our property. I had never worked with them previously & I spoke with Dipak who was experienced and collaborative. My doors look great. The Management, Measurement & Fitting teams I met were all a pleasure to deal with, & I would not hesitate to recommend Cosyseal to my friends & family.
