Window & Portlight refurbishment - fixed pane units

Fixed pane units typically feature a two part frame with at least one channel within which the pane is sealed.  Typically the seal is created from sealant applied to each side of the pane during manufacture, but it may also be a preformed rubber seal , glazing tape or a combination.  Panes are commonly Acrylic, 5-8mm thick, more often clear than tinted, but may also be toughened (heat tempered) glass and thinner.

 

The first thing to consider is that other than catalogue frames from major manufacturers (eg Lewmar), most windows are boat/model specific and given their likely age, made by companies that have long since disappeared.  So often, this is bespoke work for us and explains why we ask so many questions and seek photos prior to quoting. 

 

We can only work on units which can be dismantled, so a key consideration is identifying the number and location of so called 'split' lines.  Each unit typically has two, though some (eg N C Bjerg units) may only have one.  They are often found at the mid-points (vertical or horizontal) of units with radius corners, or at the mitred corners for units with hard corners.  Frame sides are typically held together with strips of alloy, called fishplates, which are screwed in position.  These are often drilled and tapped in position so please remember to only release one side if tempted, as otherwise you'll have a handful of fishplates and the puzzle of which goes where!

 

We now use advanced specialist silicone sealants, allied with the highest quality cast sheet materials to ensure windows outlast your custodianship.  Perspex carries a 10 year guarantee (from the manufacturer, subject to conditions) and we are confident that properly applied, the silicone sealant will last many times longer than traditional butyl based Marine Seal 033 with which most windows would have been originally sealed.