How Coxwell Helps Contractors Win Better Projects, Not Just Buy Sheets
Coxwell isn't just a polycarbonate supplier — it's a technical project partner. Here's the support contractors get: BOQ review, drawings, wind-load documentation, site training, and more.
Most polycarbonate suppliers deliver panels and an invoice. When there's a site problem — a leak, a rejected submission, a consultant asking for test certificates — you're on your own. Coxwell is set up differently. The technical support you get from us before, during, and after a project is part of what you're buying.
Here's what working with Coxwell as a project partner actually looks like.
1. BOQ Review and Quantity Verification
Before you submit a rate, bring us the BOQ and drawings. We'll check your quantities against the actual system requirements — not just the panel area, but the accessories, end closure profiles, connector counts, and wastage factors that make a quote accurate rather than optimistic.
We've seen contractors lose margin on polycarbonate jobs because they priced panel area but forgot to count 800 linear metres of U-profile. A 30-minute BOQ review call prevents that.
What we review:
- Panel area calculation against drawings
- Accessory schedule completeness
- Wastage factors for the roof geometry
- Fixing system specification match
- Any BOQ items that are ambiguous or non-standard
2. Specification Compliance Support
On projects with a consultant-written specification, we help you verify that the product you're pricing meets every clause. If there are specification requirements your proposed system doesn't meet — or if the spec has been written around a competitor's product — we tell you before you're committed.
We can also prepare a specification compliance document that you include with your bid — a table that cross-references each specification clause against Coxwell's product datasheet and test certificates. Consultants respond well to this level of documentation. It builds confidence in your submission.
3. Technical Drawings and System Details
We supply:
- System cross-section drawings showing panel, connector, cleat, end profile, and structural fixing
- Installation sequence drawings showing the correct order of operations for standing seam assembly
- End closure and flashing details for ridge, eave, wall abutment, and penetrations
- Span tables showing maximum purlin spacing for each system and thickness
These drawings are project-branded and can be included in your shop drawing submission. They reduce the back-and-forth with the consultant's structural engineer and speed up drawing approval.
4. Wind Load and U-Value Documentation
Two questions that come up on almost every institutional or government project:
"Can you provide wind load calculations for the fixing system?"
"What is the tested U-value for this system?"
We provide:
- Tested pull-out load values (≥7,000N per ISO 6892) for the cleat and connector system
- System U-value data from EN ISO 10077-2 testing for each thickness
- Third-party test certificates from NABL-accredited labs for UV performance (ASTM E-313, ASTM G-155), impact resistance (IS 14443-97), and fire classification (UL-94, EN 13501-1)
Having this documentation ready, rather than scrambling after project award, is one of the practical advantages of working with a manufacturer rather than a distributor.
5. Material Samples and Mock-Ups
We supply product samples for consultant and client approval. For large projects, we can provide a mock-up panel set — a short section of the full system, including connectors, cleats, and end profiles — that can be installed for physical inspection.
Mock-up approval before full material supply eliminates the risk of rejection after delivery and gives the client confidence in what they're approving. On projects where appearance is a specification requirement, mock-up approval is not optional — it's the standard.
6. Site Training for Installation Teams
If your installation crew is new to standing seam polycarbonate, we offer a pre-installation site briefing. This is a half-day session covering:
- Correct and incorrect side identification
- Cleat installation and alignment
- Panel interlock sequence
- Thermal expansion gap requirements
- End closure and sealing procedure
- Fastener specification and torque requirements
We've seen the same mistakes made on the first day of a new team's polycarbonate installation repeatedly. A one-time site training almost always pays for itself in reduced rework and callbacks on that project alone.
7. Post-Installation Support
If there's a site problem after installation — a leak, a panel issue, a client complaint — we investigate with you, not against you. We help identify root cause (material vs installation vs design), provide documentation to support an insurance or warranty claim if applicable, and advise on the correct remediation method.
Our interest is in projects that perform for 10+ years. Every performing project is a reference. Every failing one is a reputational cost for both of us.
The Partnership Model in Practice
Contractors who work with Coxwell as a technical partner consistently report better margins on polycarbonate work — not because our panels are cheapest, but because the project predictability is higher. Fewer callbacks. Faster drawing approvals. Cleaner submissions. Better client relationships.
If you're pricing a project that involves polycarbonate roofing or façade work, call us before you finalise your bid. The conversation takes 15 minutes and changes how you price.
Contact Coxwell's technical team at coxwell.in or through your nearest regional sales contact. We're set up to support contractors from first enquiry to project completion.
Next step
Speak to a Coxwell engineer.
Our team can help you specify the right system, review your BOQ, or answer technical questions about your project.