New! ThermGard TG50 Roof Glazing System

  • Wide Spans
  • Low Pitch
  • Non-Fragile

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Lonsdale Roofing

Specialist Safety Glass for Rooflights, Conservatories & Canopies

Safety Glass For Rooflights, Conservatories & Canopies

Selecting the right choice of glass for a conservatory, roof light, commercial atrium or other overhead glazing installation is paramount in determining a comfortable environment within the building whatever the weather outside.

From long experience, Lonsdale has worked with major glass manufacturers to determine the very best, high performance specification and glass combinations. For domestic projects price remains an important consideration, so we have sourced the best performing glass types at sensible prices to give excellent all year round comfort. Commercial projects may have different considerations, but again we place emphasis on best value and availability when recommending glass types to avoid long lead times and to keep costs down in the event of replacement.

Whatever the project, you can be sure we have the most cost-effective and SAFE solution available.​

“Their team went to extraordinary lengths on what must for them have been a relatively small job, but my Wife and I are delighted with our new roof lantern”
Keith Postan, Homeowner

Safety Considerations

Height of Glass Above Floor Level Single Glazing Canopies & un-heated spaces Double Glazing Conservatories & heated spaces
0-5 Metres Toughened, Laminated or wired Lower pane may be toughened or laminated. Upper pane should be toughened
5-13 Metres Toughened glass no more than 6mm thick, wired or laminated glass As above for 0-5m heights
13 Metres plus Laminated or wired glass Lower pane must always be laminated

NOTE: Toughened glass should not be used as single glazing or lower pane of DGUs for rooflights over swimming pools, food processing or similar areas where fragments of broken glass would prove a risk.


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