| Royal Ultraframe |
| manufacturer of Victorian conservatory roofing systems for the sunroom, solarium and conservatory industry. |
| | Snowdonia |
| Builders of conservatories, windows and doors. |
| | Spa Conservatory Villages |
| Supplier of outdoor garden structures, related building work and accessories, with several UK showrooms. |
| | Sun Digs |
| European style conservatories, sunrooms and gardenrooms. |
| | Westview Products |
| Manufacturer of custom sunrooms, conservatories, skylights and window walls. |
| | Wintergreen Solariums |
| Builders of sunroom enclosures in Southern Maine, Coastal New Hampshire and Northern Vermont. |
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