Our Guarantees
When it comes to guaranteeing our products, our word is our bond. We build our products to last and stand by our craftsmanship. Here you can find the details of our commitment to you.

A Commitment You Can Trust
We take the business of home improvements very seriously. Our guarantees are worth more than the paper they're written on. They give you complete reassurance because our products are made by the finest craftspeople and stringently checked by our quality assurance team.
With over 25 years in business, you can be sure that we'll be here to keep our promises if you ever need us.
10-Year Product Guarantee
All our windows, doors, and conservatories come with a comprehensive 10-year guarantee against defects, ensuring your investment is protected for the long term. This covers materials and workmanship, giving you complete peace of mind.
Insurance-Backed Guarantee
For added protection, our guarantees are insurance-backed. This means that in the unlikely event that CIS Windows ceases trading, your guarantee remains valid and any necessary work will still be completed.
Industry Compliance (FENSA)
We are members of the Fenestration Self-Assessment Scheme (FENSA), which ensures our installations comply with all current building regulations for England and Wales. You will receive a FENSA certificate upon completion of your project.
Quality Craftsmanship
We pride ourselves on using the finest materials and experienced craftspeople. Our products are rigorously checked at every stage of production to ensure they meet the highest standards of quality and durability.
Secure by Design
Security is paramount. Our doors and windows are fitted with high-security locking mechanisms as standard to protect your home. We're confident in the security of our products.
Customer Service Commitment
As a local, family-run business, our reputation means everything. We are committed to providing exceptional customer service from your initial quote right through to our after-sales support.
Any personal information you provide to us in relation to your guarantee or service request is held securely and used solely for the purpose of managing your installation and honouring our commitments to you. We do not share your data with third parties for marketing purposes. Your privacy is as important to us as the quality of our work.
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