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Thermo 80 Alu

These inward opening, tilt & turn windows are an upgraded version of the all timber Thermo 80 system with the noticeable difference of external aluminium cladding which provides a strong, durable external surface which requires minimal maintenance which both reduces future costs and improves the life expectancy of the product.

Enhanced security options make this range able to comply with Secured By Design specifications and also has many other optional accessories for safety, security and comfort at a very competitive price. 


• Engineered (laminated) timber profiles
• Pine or Oak
• Factory applied paint or stain finish

• Tilt & Turn, tilt only or turn only - all inward opening

 Siegenia Titan AF opening mechanisms

 Circumferential fittings with micro-ventilation and anti-burglar catch

• Factory fitted 24mm double glazing or 40mm triple glazing

• Internally beaded by secret nailing

• Overall U-value of (approx.) 1.2W/m2K - double glazed or 0.9W/m2K - triple glazed

 Shaped opening windows possible

 Durable external aluminum cladding

 Competitive price

 10 year guarantee*


Thermo 80 Alu windows are inward opening casements with a tilt & turn function. Several key types and functions are available:

 Fixed window
 Tilt & turn - first 90 degree turn of handle gives a tilt function, a full 180 degree turn allows the window to turn inwards
 Turn & tilt- first 90 degree turn of handle allows the window to turn inwards, a full 180 degree turn gives a tilt function 
 Tilt only- bottom hung inward tilting window for ventilation
 Tilt & turn balcony door - same function as tilt & turn window but with a deeper bottom rail. Available with handle inside only.
 Turn only balcony door - inward or outward opening door with deeper bottom rail than that of a window. Available with handles in only.

Opening lights and fixed lights can be built in one frame with endless design possibilities.


Thermo 80 products can be supplied double or triple glazed. As standard the units are double glazed (see right) 4-16-4mm (4mm pane of glass, 16mm gas cavity and a second 4mm pane of glass). The glass unit is filled with Argon gas as standard and has a soft, low-e coating giving a centre pane U-value of 1.1W/m2K (overall window U-value of 1.2W/m2K). Triple glazed units (see left) are 4-14-4-14-4mm (4mm pane of glass, 14mm gas cavity, 4mm pane of glass, 14mm gas cavity, 4mm pane of glass) with a centre pane U-value of 0.6W/m2K (overall window U-value of 0.9W/m2K).


Safety glass is used in the form of either toughened or laminated glass for enhanced safety and security.


Specialist glazed units incorporating acoustic, solar control and self cleaning options are available, as well as sandblasted or decorative obscure glass for extra privacy.


The glazing units are internally beaded by secret nailing. This means that there are no pins or nails visible anywhere on frames, creating a sleek, clean finish.


Glazing Bars


There are 2 kinds of glazing bars on the Thermo 80 Alu system; structural and decorative.


Structural bars, known as transoms (horizontal) or mullions (vertical) seperate two or more different glazing units in either a fixed or an opening light and also act as the structural element between an opener and a fixed light when built into a single frame. When acting as this structural element, the bars can be 110mm or 124mm wide. When being used to divide two glass units, the transoms or mullions can be 66mm, 80mm or 126mm wide.


Decorative glazing bars are a thinner, more elegant solution for creating a traditional appearance to doors & windows. They come as a 24mm timber bar internally and externally with dummy spacer bars inside the glass unit. This creates the illusion that there are several glass units, as would of been done trraditionally, but without the weakness that this creates.


SAA key locking Hoppe handles

Trickle vents to the outer frame = trimvent

Trickle vents to head of sash = spilvent

Opening restrictors (child safety catch)

Protective foil to glazed units for protection

Hau-Tau lever fittings for high level windows.



All timber is finished with a choice of stains or paints. Paint choices are from the RAL Classic range (approx. 250 colours).

All paints and stains that are used are water based, micro-porous products from Akzo-Nobel. Actual timber samples are sent out upon receipt of order to help assist in the correct colour choice for your project.

It is possible to have a 2 colour system with a different finish from inside to outside, meaning that a solid paint can be used externally and a clear lacquer could be used internally if you wanted to appreciate that natural beauty of the timber without any additional colouring.


Aluminium Cladding

The external aluminium cladding on the Thermo 80 Alu range is Polyester Powder Coated (PPC) to a choice of paint finish from the RAL Classic range. This range has approximately 250 colours to choose from.



Thermo 80 & Elite 92 Brochure

CAD Details (PDF)

Double Glazed

Triple Glazed


CAD Details (DWG)

Double Glazed

Triple Glazed