Trade Supply

We supply uPVC windows and doors, composite doors, glass, mirror, double glazed sealed units, secondary glazing, bespoke painted splashbacks, glass balustrades and other glazing supplies to the trade in Cornwall.

We are suppliers to Trade in Cornwall of uPVC and aluminium windows and doors. Trade uPVC Suppliers of many well-known and reliable profile ranges, these include:

  • Rehau,
  • Profile 22,
  • Residence Collection,
  • Linear,
  • Deceuninck,
  • Solodor

Products from these profile ranges include:

A large range of colour foil finishes in woodgrain or smooth finishes.

A range of flush casement uPVC windows, standard casement windows, French doors, uPVC sliding patio doors, uPVC Residential doors and GRP composite doors in a range of designs suitable for both traditional and modern properties.

A full range of traditional sliding sash uPVC windows suitable for properties in conservation areas. Ultimate Rose, Heritage Rose, Charisma Rose. Ecoslide.

Secondary glazing frames and glass. Horizontal sliding and vertical sliding available. Any colour frame available.

Cornwall Trade suppliers of Aluminium windows and doors:

Cortizo aluminium windows, doors, bifold doors and lift & slide patio doors with high micron marine-grade paint finishes in any colour.

Smarts aluminium windows and doors, Commercial aluminium for all school, college and businesses. All available in any colour.

Glass and Glazing products:

A full range of toughened glass to bespoke sizes depending on the application. We work directly with glass manufacturers to allow us to keep prices as competitive as possible.

Heritage and Restoration Glass

We supply heritage and restoration glass for historical properties where it is essential to keep the original traditional appearance.

  • 2mm Picture-frame glass in stock, cut to desired size on site.
  • Stockists of 3mm greenhouse glass at set sizes, 610mm x 610mm, 610mm x 457mm, or Dutch lights 730mm x 1422mm or cut to desired size in-house.
  • Georgian wired polished plate safety (GWPPS) glass, mainly used in offices and schools.
  • Stockists of a range of float glass thicknesses cut to bespoke size, polished or arrised edges if required.

 Fire Glass

Suppliers and installers of fire glass and fire glass applications to meet 30 minute or 60 minute integrity and insulation. The fire glass we supply include products from:

  • Pilkington range of fire glass
    • Pyroguard,
    • Pyrostop,
    • Pyrodur,
    • Pyroshield from. Also Saint Gobain Pyroswiss and Contraflam

Fire glass gaskets and tapes to include Lorient gaskets, Kerafix ceramic fibre tape.

Laminated Safety Glass

We supply toughened laminated safety glass suppliers for balustrades and Juliet balconies, heat-soaked laminate for added protection against spontaneous combustion and acoustic laminate of various thicknesses to help reduce noise pollution.

We can also supply Fineo ultimate slim laminated glass giving exceptionally low U-Values.  

Roof and Canopy Glass

Roof glass and roof glass units to help reduce glare with solar-control and self-cleaning. We can supply Pilkington Activ in a range of “colours” Neutral, Blue tint, bronze tint. They can all be made into double glazed units for conservatories or other applications.

Glass canopies, shower screens for bathroom installations, privacy screens for office commercial installations, aluminium room partition frames and glazing with manifestations where appropriate.


A fully stocked range of mirror types and thicknesses, cut and polished in-house to bespoke sizes. Drill-holes for screw fixing, safety-backed for added adhesive safety if broken or cracked in use.

Traditional standard silver mirror, bronze mirror, antique mirror. Bevelled mirror, shapes and effects. Heated demister pads.

Glass Splashbacks:

GT Glassmasters offer a full, comprehensive start to finish service for all glass kitchen / bathroom splashbacks.

We use 6mm low iron glass to achieve the clearest, most vibrant finish. The glass is sprayed in-house to any colour finish. We can match all RAL colours and paint manufacturer colours.

We can also offer various finishes as well as the standard smooth painted finish. We offer glitter effects, rainbow glitter, mirror finishes, fleck / web finishes. We can also fit digital photograph images to the glass, depending on the size of glass and quality of the image. We can also create and supply glass tiles, mirror tiles and backsplashes.

Fixtures & Fittings

A full range of aluminium tracks and fixings to suit various applications including for both domestic and commercial use:

 Posiglaze balustrade system 17.5mm toughened laminated and 21.5mm toughened laminated, point-fixed Juliet balconies, Skyforce & Lyon Juliet balconies.

Post & Rail balustrade systems to suit application including staircase balustrading, either for external use using 316 stainless steel, or for internal use. Full range to include cylindrical or square handrails and upstands, d-clamps, upright clamps and wall flanges.

Hinges Handles and Locks

We offer a comprehensive range of:

  • window and door hinges,
  • egress hinges,
  • friction hinges,
  • gearboxes,
  • escutcheons,
  • multi-point locking mechanisms,
  • standard locking cylinders,
  • thumb-turn cylinders,
  • door flag hinges.

Window and door handles including:

  • standard lever/lever,
  • lever pad handle,
  • universal window handles,
  • cockspur handles,
  • folding openers for high level windows and commercial properties.


Stockists of a comprehensive range of silicones, putty, mirror adhesive, glazing tapes, glazing packers, privacy films.

Office Location

Unit 2 The Great Western Railway Yard, Saint Agnes TR5 0PD

01872 273299 / 01209 712346

Open Hours

M-F: 9am – 5pm, S-S, closed

Fleck effect splashbacks painted for a trade customer

Fleck effect splashbacks painted for a trade customer

Traditional putty glazing frames glazed in our workshop ready to be installed by our joinery trade customer

Traditional putty glazing frames glazed in our workshop ready to be installed by our joinery trade customer

Customer Testimonials

G.T Glassmasters
Based on 18 reviews
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Lauren PorterLauren Porter
12:50 03 Mar 22
Great price that won’t be beaten anywhere else, amazing service and friendly staff. Highly recommend.
Charlotte JohnsonCharlotte Johnson
12:54 15 Mar 21
Super friendly and helpful team, and very reasonably priced stock. We picked up some greenhouse glass following the storm - so glad to have this local business. We’ll be back for more glass/ mirror bits and pieces!
Tom ThornTom Thorn
15:11 26 Feb 21
Excellent service and a good price. I had some single pane glass break that needed replacement cutting, Graham was able to arrange a replacement pane the same day. Would highly recommend!
Chris EliasChris Elias
14:33 29 Jun 19
Two really friendly gentlemen came and were very cheerful despite being up a ladder replacing our bedroom window panes during the horrendous winds the other day.Excellent price and excellent serviceChris Elias
Lesley JayLesley Jay
11:12 05 Feb 14
Graham has just been to repair 6 panes on our old greenhouse and he was brilliant. He did his upmost to help pull the old greenhouse into shape including moving other panes back into place that had slipped, fixing the door that was flapping around and delivered excellent customer service and was very friendly. I would definitely recommend him.
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