The membrane is half the roof; the hands that weld it are the other half. A first-class membrane badly applied fails faster than a modest one applied well. Whether you’re a homeowner or a project engineer, these eight checks separate the professionals from the pretenders.
The checklist
- Ask what membrane they intend to use — by name. A pro answers with manufacturer, product, polymer and thickness (“4 mm InsuGrand APP, polyester carrier”). “Good imported rolls” is a red flag.
- Ask why that system — the right answer references your specific case: exposed or covered, movement, drainage. Compare with the logic on our solutions pages.
- Look at their lap work in photos — continuous squeezed-out weld beads at every lap (what good torch work looks like). Laps are where roofs leak.
- Ask how they handle details — upstands, drains, corners with gussets. Detailing skill is the craft.
- Check preparation is in the offer — falls, crack repair, primer. If preparation is missing, the quote is fiction.
- Flame safety and alternatives — do they carry proper equipment, and do they know when to switch to flame-free self-adhesive membranes?
- References with age — a roof that’s five years old tells the truth; one finished last month tells nothing.
- A written guarantee — with the system named in it.
Where Insutech fits
Insutech is the manufacturer, not the applicator — but we support both sides of the job. Contractors buy factory-direct and get application training and tutorials (on every product page), and clients can contact us to be pointed toward experienced applicators of our systems in their area — with the full technical file of datasheets, storage guides and system build-ups behind every specification.