Renolit condensation free boat window




No condensation

Thermally insulated due to the synthetic window frames

Fixed, sliding and hinged windows available

Renolit frames available in 5 colours

6 or 8mm toughened glass, or acrylic

Single or double glazing

Glass and acrylic available as clear, or 4 other tints

Radius or mitred corners

Simple installation with a unique 'click' system


Perfect for leisure boats


Unique Characteristics


Due to the plastic window frames, these thermally insulated Renolit windows improve the warmth in a boat and prevent condensation.  With the unique 'click' system, the high quality fire retardant windows are easily installed without the need for screws.  These synthetic window frames are suitable for structures that are between 4 and 18mm thick, with a choice of frame colour and glass tint.   

Frame Finish


The frames are fitted with a UV and salt water-resistant Renolit coating, which is also scratch-resistant.  Frames are an important element to the aesthetic look of your boat, so we offer five colours. 

Light Grey (Aluminium look)



(RAL 9001)

Dark Blue

(RAL 5011)


(RAL 9005)


Windows are generally glazed with toughened glass.  They can be either single or double glazed (double glazed for fixed or hinged windows only).


On occasions acrylic is preferred. The acrylic in the Renolit window has a hard coating applied to both sides of the window-pane to keep scratching to the minimum.


Glass thickness options are:

  • 6mm

  • 8mm


Glass and acrylic colour options are: 

  • Clear

  • Grey tint

  • Bronze tint

  • Green tint

  • Blue tint

Window Style

Windows can be either fixed, hinged or sliding windows.

Mitred sliding window 

in anthracite

Renolit fixed boat window - mitred corners

Radius and mitred fixed window

in anthracite

Fixed Window

Boat Window


Hinged Window Diagram

Sliding Window

Boat Windows

The corners can be either radius (as shown above) or mitred, or a combination of both.



Insect screens can be fitted in hinged and sliding windows.  When opening these styles of windows it is not necessary to remove the insect screen.

Sliding window

in dark blue


Unique Characteristics


Portlights are often mounted in sleeping areas, galley or heads of a boat, areas where a lot of condensation occurs.  The advantage of the thermal bridge means that these portlights do not attract condensation.

External view

Size: 375 x 175 x R55

Internal view

Size: 375 x 175 x R55

“Our boat used to have aluminium portlights and these turned out to be a real water trap, particularly in autumn and spring! With these Renolit portlights there are only advantages – not a single drop of water on them, we can have double glazing and choose from various colours.  The clamp system is much handier than those irritating rotary knobs.  There are four clamps, which you can loosen very simply and allow the insect screens to remain in place”

Cor Baars from Numansdorp

Renolit Portlight Dimensions

They can be either a fixed or hinged and are fully compatible with the traditional portlights.  All portlights are fitted with PMMA plexiglass (acrylic).


The frame is possible in all five colours (light grey, anthracite, cream, dark blue and black).


Single or double glazed acrylic.

They can be supplied with insect screens that remain in situ, even when closed.  Rain hoods are also available.

Call us today on: +44 (0) 1621 773590

Based in Southminster, Essex, UK

© 2021 Houdini Marine Windows Ltd