HS ALU Terrace Doors in Białystok — a Panoramic Way Out to the Terrace

HS ALU Doors — Key Specs

HS ALU terrace doors are aluminium lift-and-slide doors for the situation where a terrace is to join the living room through one vast glazed opening. The HS mechanism lifts the sash for sliding, so even a huge, heavy pane moves smoothly and lightly in a single move — and stays stable once lowered.

The sash can weigh up to 400 kg and reach dimensions of up to 3,2 m high and 3,3 m wide. It is a solution for very large openings that classic hinged doors can no longer handle. The low threshold makes crossing easier — a comfortable way out to the terrace, also for the elderly or with a pushchair. The structure is sealed with EPDM gaskets.

Why Aluminium in HS Doors?

The larger the pane of glass, the more weight the door structure has to carry — and this is where aluminium comes in. It is more rigid than uPVC, so with huge HS sashes it keeps its shape and guides them evenly, without sagging. As a result HS ALU handles dimensions that a uPVC profile, at such a weight, can no longer provide.

Aluminium also gives a slim frame — less profile, more glass and light — and durability: it does not warp in the sun and copes with Podlasie weather for years. If the terrace or balcony opening is smaller, HS doors on a PVC profile (HS Salamander) work just as well — often at a lower price. We will suggest which solution suits your terrace and budget.

Who Are HS ALU Doors For?

HS ALU doors are the answer for those who want a panoramic, low-threshold way out to the terrace or garden — with no compromise on the size of the glazing. They work well in homes and premises in Białystok and the surrounding area.

• Large living-room-to-terrace glazing — when you want the living room wall to open onto the garden.
• Very wide openings — sizes up to 3,2 × 3,3 m and a sash up to 400 kg, beyond the reach of classic hinged doors.
• A comfortable way out to the terrace — a low threshold makes crossing easier, also for the elderly and with a pushchair.
• A modern, slim look — a narrow aluminium frame lets in the maximum amount of light.

If maximum warmth or a lower price at a smaller opening matters to you, consider the PVC version. We will advise whether aluminium or HS doors on a PVC profile is the better fit. See also our full aluminium joinery range.

Advice, Fitting and Service in Białystok

A vast, heavy terrace sash is a structure where every millimetre matters — from measuring the opening, through supporting a sash up to 400 kg, to a tight, even setting of the threshold. That is why we start with a site visit, not with a catalogue.

• Free on-site survey — we check the opening, the structure and the fitting conditions for a large, heavy sash.
• Free written quote — with the right glazing pack and HS ALU version for your terrace.
• Delivery and fitting by our own Pro-Plast crew — with a warm, airtight fit and an even threshold.
• 5-year warranty and instalments — peace of mind for years, with the option to spread the payment.

We are a local Białystok firm with real fitting experience, so we do not vanish once the structure is in — if the heavy sash needs adjusting, we are right on hand. Book a free survey and find out the exact HS ALU door price.

Frequently asked questions