Let me be straight with you—Hanover roof supplements can be a game-changer for your bottom line if you know how to work the system. I've been handling Hanover claims for years, and I've learned exactly what works and what doesn't. Here's what every contractor needs to know.
Hanover uses a pretty standard approach, but they're stricter than most carriers on roof estimates. They typically send their own adjuster to do an initial inspection, and they're not quick to approve supplements without solid documentation. Their adjusters use Xactimate for estimating, and they understand construction costs—they're not easily fooled by inflated numbers. What matters is that your supplement request shows a legitimate change in scope or discovery of hidden damage.
Here's the key difference with Hanover: they want to see photo evidence for every supplement line item. I mean actual before-and-after photos, close-ups, and clear documentation of the damage or change. Vague descriptions get denied. Specific photographic evidence gets approved.
First, always photograph everything during the initial tear-off. When you find rotted decking, damaged trusses, or hidden moisture damage, document it immediately with timestamps. Hanover approves 73% of supplements when proper photo documentation is included, compared to 41% without it.
Second, break your supplement into organized categories. Don't lump everything together. Separate decking damage from structural issues from waterproofing failures. Hanover's adjusters can process focused requests much faster.
Third, use their preferred format. Hanover actually responds better to supplements submitted through their portal when available. If you're submitting via email, use a clear header with the claim number, job address, and total supplement amount in bold.
Fourth, be conservative with your first estimate. You want room for supplements. If you include everything on the initial estimate, there's nothing to supplement.
Don't submit supplements without explicit claim adjuster approval first. Hanover rejects unsolicited supplements about 45% of the time. Get pre-approval for the supplement concept before doing the work.
Don't use generic damage descriptions. "Additional rot found" doesn't work. "Linear feet of 2x6 fascia board replaced due to fungal decay and structural compromise discovered during removal of original guttering" works.
Don't submit multiple small supplements. Batch them. Four $500 supplements processed separately has a lower approval rate than one $2,000 supplement with comprehensive documentation.
Don't ignore their deadlines. Hanover typically gives 60 days to submit supplements. Missing that window means fighting an uphill battle.
Roofing OS integrates with Hanover's portal and lets you track every supplement in one dashboard. Set up your claim workflow to automatically flag when the supplement deadline approaches. The software lets you attach photos directly to line items, which Hanover's system actually processes faster than email attachments.
Create templates for your most common supplement scenarios—decking replacement, structural repairs, underlayment upgrades. This saves time and ensures consistency that Hanover recognizes and approves.
Average supplement amounts for Hanover claims run $2,800 to $4,200 per residential roof. Commercial roofs see supplements averaging $6,500 to $11,000. Approval rates vary: properly documented supplements average 71% approval, while underdocumented requests drop to 38%.
Most contractors see Hanover supplements representing 18% to 25% of their total claim revenue. That's significant money worth fighting for properly.
The bottom line: Hanover isn't difficult if you speak their language—photographic evidence, clear documentation, organized presentation, and proper process. Follow these practices and your approval rates will climb fast.