About Top 1 Window – Trusted HDB & BCA 3/4 Window Installer in Singapore

We supply and install a wide range of options, including sliding, casement, top-hung, Naco, and slide-and-swing windows. Whether you’re upgrading your HDB, BTO, private home, or commercial space, we’ve got the perfect fit for you.

Our high-quality aluminium window grilles are built to last and can be customized to fit your space perfectly. Choose from a wide variety of designs, including slim window grilles, lattice window grilles, pet-friendly options, and more. Tailored to meet your lifestyle and home needs, our grilles offer both safety and aesthetic appeal.

Maximize your space with our stylish and functional bi-fold doors. Ideal for bathrooms and kitchens, they come in a variety of designs to complement your interior. Wide range of designs and colours available.

Enjoy an unobstructed view while keeping your home safe. Our innovative and sleek invisible grilles provide security and peace of mind — perfect for homes with beautiful landscapes.

Our aluminium gates provide a secure, stylish, low-maintenance solution for your home or business. Lightweight yet durable, they offer long-lasting protection. Custom designs are available to match your style and security needs.

Add timeless elegance and security to your property with our aluminium doors. Perfect for HDBs, BTOs, condos, and landed properties, these aluminium doors are crafted to withstand the elements while providing durability. Our aluminium doors include sliding doors, swing doors, collapsible doors and basin doors.