What makes a pergola suitable for a windy site?
Suitability is the result of a complete load path. Wind acts on the roof, beams, posts, side systems, connections, base plates, anchors and supporting concrete or structure. Changing the height, width, projection, attachment condition or number of enclosed sides can change the forces, even when the product family looks identical.
For this reason, a statement such as “wind resistant to 100 mph” is incomplete unless it identifies the sample, test setup and pass criteria. A blower test can provide useful physical evidence, but the result must remain tied to the tested configuration.
What did the JIAKE HR001 sample test show?
Intertek Testing Services Shenzhen Ltd., Guangzhou Branch issued report 241225201GZU-004 on January 20, 2025 for one HR001 aluminum alloy louvered pergola sample supplied by the applicant. The report identifies the sample as 3 × 3 × 2.5 m.
| Reported item | Value | How to interpret it |
|---|---|---|
| Product / model | Aluminum alloy louvered pergola, HR001 | The result belongs to this reported sample. |
| Sample specification | 3 × 3 × 2.5 m | Other spans and heights require separate review. |
| Referenced test basis | EN 1991-1-4:2005+A1:2010 and client requirement | The report used this reference plus the stated procedure. |
| Blower speed | 39.8 m/s (89 mph) | This is the measured test airflow, not automatically a site design-wind rating. |
| Exposure duration | 15 minutes at each of four positions | The blower targeted the shorter face at two heights and two 45° positions. |
| Roof condition | Louvers closed | Operating instructions may require a defined roof position in severe weather. |
| Recorded result | Pass at all four positions | The report recorded no fracture, loosening, deformation/wear or impaired function. |
Test wind speed versus design wind speed
A laboratory blower test and a building-code design calculation answer different questions. The test observes a physical sample under a documented setup. A site design process considers location-specific wind data, terrain, height, building position, pressure coefficients, openings, load combinations and safety factors.
That distinction is especially important on rooftops, coastal sites, open countryside and building corners, where exposure can be more severe than in a sheltered garden. Use the test report as supporting product evidence and use local engineering to determine the required project configuration.
Seven inputs to verify before requesting a wind recommendation
- Exact installation location. Country, city and postcode allow the project team to identify the applicable review route.
- Site exposure. Note whether the structure is sheltered, coastal, elevated, on open terrain or on a rooftop.
- Overall dimensions. Provide width, projection and intended clear height—not only the floor area.
- Attached or freestanding arrangement. A wall connection changes the load path and requires information about the supporting building.
- Foundation or substrate. Identify concrete slab, isolated footings, deck, roof structure or another substrate. Slab thickness alone is not an anchor design.
- Roof and operating mode. Confirm louver type, motor/control system and severe-weather operating instructions.
- Side enclosures. ZIP screens, shutters and sliding glass can change both comfort and structural demand.
Why profile size alone does not prove wind resistance
JIAKE's current pergola profile schedule includes multiple systems rather than one universal section set. Examples include a 150 series with a 100 × 100 × 2.0 mm post, 150 × 150 × 1.6 mm beam and 150 × 32 × 1.25 mm blade; a 173 medium-duty series with a 150 × 150 × 2.0 mm post, 140 × 161 × 2.0 mm beam and 173 × 45 × 2.0 mm blade; and a 230 series with a 150 × 150 × 2.5 mm post, 240 × 50 × 2.5 mm beam and 230 × 50 × 1.8 mm blade.
These are textual transcriptions of the supplied profile schedule, not standalone capacity ratings. Section geometry, alloy condition, span, joints, fasteners and anchoring work together. Ask which complete system is proposed for your dimensions and which documentation supports it.
Do ZIP screens make a pergola safer in wind?
A ZIP screen can reduce uncomfortable crosswind for occupants, but a deployed screen also receives wind pressure and transfers force into its guides and the main structure. It should therefore be included in the project review rather than treated as a decorative accessory.
A separate Intertek report, 241225201GZU-002 dated January 17, 2025, records a 2.525 × 2.7 m HR002 ZIP-screen sample. The 2.690 × 2.312 m test area was exposed to 30.0 m/s (67 mph) airflow for 15 minutes and passed the report's checks for fracture, loosening, deformation/wear and impaired function. This result remains specific to that sample and setup.
A practical selection sequence
| Step | Decision | Evidence to request |
|---|---|---|
| 1 | Define location and exposure | Local requirement or engineer's design criteria |
| 2 | Fix dimensions and layout | Plan, elevations and attachment condition |
| 3 | Select a candidate system | Post, beam, blade and connection schedule |
| 4 | Review sides and controls | ZIP/glass limits and severe-weather instructions |
| 5 | Design the support | Base plate, anchor and foundation information |
| 6 | Confirm before order | Project-specific drawings and applicable documents |
Frequently asked questions
Is 39.8 m/s the same as an 89 mph hurricane rating?
No. It is the airflow used in the stated sample test. A hurricane or building-code rating requires a defined standard, exposure assumptions, pressure calculation, safety factors and project configuration.
Should louvers be open or closed in high winds?
Follow the operating instructions issued for the ordered system. The cited HR001 blower test was conducted with the louvers closed; this fact should not be converted into universal advice for unrelated systems.
Can I install a high-wind pergola on an existing patio slab?
Possibly, but the slab, reinforcement, edges, base plates and anchors must be evaluated. Do not assume an existing slab is adequate from thickness alone.
What should I send for a preliminary review?
Send the installation country and city, approximate width/depth/height, site photos, attached or freestanding preference, substrate information and desired side enclosures.
Source record
- Intertek report 241225201GZU-004, dated January 20, 2025: HR001 aluminum alloy louvered pergola, 3 × 3 × 2.5 m, wind-resistance test.
- Intertek report 241225201GZU-002, dated January 17, 2025: HR002 ZIP screen, specified 2.525 × 2.7 m, wind-resistance test.
- JIAKE supplied profile schedule, “Pergola and Sunroom Model Table,” reviewed September 2, 2026.
Copies and applicability details can be requested during technical review. Publication of a report summary does not replace the complete report or project engineering.
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Request My RecommendationView the high-wind solutionSeptember 2, 2026 — First publication. Added HR001 sample conditions, four-position result, profile examples, ZIP-screen evidence and project-input checklist.