top of page
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


Renolit condensation free boat window - leisure boat internal

Perfect for leisure boats

Renolit (UPVC) condensation free boat windows

At Houdini Marine Windows, we offer the first Renolit (UPVC) condensation free boat windows for the marine market. The boat windows with plastic frames come in many different options and are also suitable as boat portlights. No matter which options you choose; you will experience many advantages!

The unique characteristics of our condensation free boat windows

Due to the plastic frames on these boat windows, the 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 8 millimetres thick, with a choice of frame colour and glass tint.

Frame Finish


The frames of the condensation free boat windows are fitted with a UV and salt water- and scratch-resistant Renolit coating. Because frames are an important element to the aesthetic look of your boat, we offer five different colours.

Light Grey (Aluminium look)



(RAL 9001)

Dark Blue

(RAL 5011)


(RAL 9005)

UPVC Marine Frame - Cream
UPVC Marine Frame - Black
UPVC Marine Frame - Light Grey
UPVC Marine Frame - Anthracite
UPVC Marine Frame - Dark Blue

Boat 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 condensation free boat windows has a hard coating applied to both sides of the window-pane to keep scratching to the minimum.


Glass thickness options are:

  • 6 millimetres

  • 8 millimetres


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

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 screens.

Renolit condensation free sliding window in dark blue

Sliding window

in dark blue

Renolit fixed boat window in anthracite - radius and mitred


Our condensation free boat windows with plastic frames can also be used as portlights. Portlights are often mounted in sleeping areas, galleys or heads of a boat. These are all areas where a lot of condensation occurs. The advantage of the thermal bridge means that these portlights do not attract condensation. Our condensation free boat windows can either be fixed or hinged and are fully compatible with the traditional portlights. All portlights are fitted with PMMA plexiglass (acrylic). The frame comes in five colours (light grey, anthracite, cream, dark blue and black).

Renolit Porthole - External View

External view

Size: 375 x 175 x R55

Renolit Porthole - Internal View

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

The boat portlights can be made with single or double glazed acrylic. They can be supplied with insect screens that remain in situ, even when closed. Rain hoods are also available.

Inform us about your preferences

There are not only many advantages to our condensation free boat windows with plastic frames, there are also many options and features to choose from. Please get in touch with our office in Southminster, Essex, via +44 (0) 1621 773590 or and let us know your preferences. We happily help create the perfect windows for your vessel(s), also if you prefer frameless illusion boat windows or require canal boat windows!

bottom of page