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Alu lift and slide door - ALUPROF MB-77 HI

The Premium Eco Alu System

from 4,904from 4,904

incl. 19% VAT, free delivery**

  • 174 mm construction depth
  • Additional insulation insert
  • Slim-look profile
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Estimated production time 6-9 weeks1
MB-77 HI

Overview of features

Optimised thermal insulation and energy efficiency

Uw-values starting at 0.84 W/m²K

Extremely high stability and break-in protection

Robust, extremely long-lasting material

Special construction with corner coupling possible

Customer satisfaction

Over 200,000 happy customers and counting

Russ Drive New Zealand
Residential building
Russ DriveNew Zealand
Composite windows and doors for a passive house

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Residential building
Wood-alu and aluminium windows and doors

"We love our new windows and doors! The windows24 team gave us great advice and recommendations and was so patient with all changes to our project."

Donvale, Australia
Residential building
uPVC sliding doors

“The window expert team was supporting us throughout the whole process: realising our ideas, choosing long-lasting materials, and the shipping from Germany to Australia.”

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Residential building
uPVC windows and doors

“Great customer service! The professional advice from the windows24.com-team helped us choose the ideal products for our situation.”

Peppertree Australia
Residential building
Special window shapes

“windows24.com delivered windows to us that perfectly fit to the design of our house. These are no standard windows! We were surprised by how exactly we could define the shape of each window.”

Technical details

ALUPROF MB-77 HI - system description

  • 174 mm frame depth / 77 mm sash depth
  • Central chamber filled with a special insulating insert for increased thermal insulation
  • Broad heat barriers, polyethylene inserts and uPVC profiles
  • Weatherproof thanks to continuous pane and compression seals
  • Glass strips with a closed shape for increased break-in protection
  • Standard glazing with a Ug-value of 1.1 W/m²K
  • Triple glazing with a Ug-value of up to 0.6 W/m²K
  • Siegenia-Aubi HS-PORTAL 300KF*
  • Built-in construction with corner coupling possible**
  • High basic security with two locking bolts as standard
  • Thermal, safety and soundproof glazing possible
  • Effortless opening and closing, even with heavy sashes
  • Concealed locking technology through the swivel hook gear
  • High resistance to wind and driving rain-proof
  • Increased light penetration due to a large glass area


  • Additional break-in protection with security fittings rated up to RC2 N
  • Integrated multipoint locking system, lockable from inside and outside
  • Lock monitoring

* if the weight of the sash exceeds 300 kg, we use hardware from a manufacturer of the same or higher quality
** for special constructions that feature corner coupling, please contact our customer service team on 0711 860 600

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The lift and slide door profile

ALUPROF MB-77 HI - The advantages in detail

The ALUPROF MB-77 HI combines functionality, design and security in one outstanding door system. A variety of customisation options make the aluminium lift and slide door the perfect fit for your home. It creates a harmonious connection with your terrace, balcony or garden.

Reliable security for your home

The resistance class (RC) indicates the level of security your lift and slide door will provide. The ALUPROF MB-77 system can be rated up to RC2 N. This means that the ALUPROF MB lift and slide door can withstand external attacks from basic tools for at least three minutes. This makes class RC2 N a good choice for private homes, as the majority of opportunistic thieves will leave a property within this period of time if their attempts to break in are unsuccessful. The MB-77 HI also features six burglar-resistant hardware fittings as part of this resistance class.

Reduce your energy bills with efficient thermal insulation

Methods of thermal insulation are improving all the time, and insulation concepts for windows and doors are becoming increasingly important. You can find out more about insulation levels by looking at the heat transfer coefficient (a.k.a. the U-value). The MB-77 HI from ALUPROF boasts a frame construction with Uf-values starting at 1.4 W/(m²K). This is complemented by its Uw- value, which comes in at less than 0.84 W/(m²K) with the appropriate glazing. This overall value is not only of relevance with regards to various regulations and such legislation as the German Buildings Energy Act, but can also be of importance when applying for subsidies and allowances. In general, lower U-values indicate that an architectural feature has better thermal insulation and will let less heat escape when closed.

Stylish design

With its clean, modern design, the ALUPROF MB-77 HI fits seamlessly into modern new builds and existing properties alike. The door system's discrete jambs fit with the overall look and also make the glazing appear larger, creating a stylish connection between the interior and exterior spaces. The ALUPROF MB-77 HI features a combination of:

  • linear design
  • high-quality manufacturing
  • modern sashes

This makes it perfect for use in a huge selection of different environments, ranging from urban landscapes to natural surroundings – this is due to the ideal combination of simple elegance and superlative technical execution it provides.


The ALUPROF MB-77 HI lift and slide door profile features more thermal and acoustic insulation than the basic model thanks to the additional insulation inserts in its chambers.

ImageProfileModelProduct TypeWidthHeight
MB-77 HIALUPROF MB-77 HILift and slide door from 200 cm from 180 cm
windows24.com available New White from € 4,904
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