The greenhouse supplier, glass processor and structural designer need one coordinated pane schedule. Local safety and building requirements still govern the final selection.
Common glass descriptions
| Description | What it tells the buyer | What remains to be verified |
|---|---|---|
| Annealed float glass | Basic glass manufacturing and cooling condition | Whether safety treatment is required and whether the breakage pattern is acceptable. |
| Heat-strengthened glass | Glass has received a controlled heat treatment | Certified properties, permitted application and breakage behavior. |
| Fully tempered/toughened glass | Safety treatment changes strength and breakage pattern | Applicable standard, heat treatment records, dimensions, roller distortion and spontaneous-breakage risk management. |
| Laminated glass | Layers are bonded with an interlayer intended to retain fragments | Interlayer, edge exposure, moisture compatibility, weight and support details. |
| Diffuse or coated greenhouse glass | Surface or coating changes light distribution or optical performance | Measured transmission, haze, coating side, durability, cleaning limits and warranty basis. |
Ask for optical data that matches the crop plan
Compare measured hemispherical or direct-light transmission, haze or diffusion, coating and test method on the same basis. A higher single transmission number is not automatically better if the project values light distribution, summer heat management or crop uniformity. Screens, structure and dirt also change delivered light.
Coordinate panes, seals and frame movement
Glass needs continuous support, appropriate clearances, compatible gaskets and controlled contact with metal. The detail must accommodate manufacturing tolerances, frame deflection, thermal movement and drainage without concentrating stress at an edge or corner.
Greenhouse glass RFQ checklist
- Applicable glass and building standards for the project location.
- Pane schedule with dimensions, thickness, heat treatment and edge work.
- Declared light transmission, haze, coating, test method and tolerance.
- Glazing bars, gaskets, setting blocks, sealants and drainage details.
- Quality records, labeling, packaging, breakage allowance and replacement process.
- Cleaning products, coating restrictions and warranty conditions.
Need to normalize two glass specifications?
Send the pane schedule, optical data, site loads and glazing details. We can help identify missing quotation fields and interface questions.
Request a glass specification reviewFrequently asked questions
Is tempered glass always required?
Requirements depend on location, pane position, building rules and design. Confirm the applicable standard and project engineer’s specification.
What is diffuse greenhouse glass?
It redistributes incident light. Compare measured transmission and haze together and confirm the coating or surface durability.
Why specify edge quality?
Edges and corners are sensitive areas. Processing, handling, support and contact details can influence breakage risk.
Planning reference: UC Davis, Greenhouse Structure and Glazing Material.
Click to Chat