How Much Does Flat Roof Installation Cost in St. Louis, MO?
Average flat roof installation costs in St. Louis range from $11,019 to $14,909. Get a free, customized estimate below.
Flat Roof Installation Cost Breakdown — St. Louis, MO
| Item | Unit | Qty | Unit Price | Total |
|---|---|---|---|---|
| EPDM / TPO Membrane | sq ft | 1200 | $5.23 | $6276.00 |
| Insulation Board | sq ft | 1200 | $2.66 | $3192.00 |
| Flashing & Edge Detail | linear ft | 80 | $11.40 | $912.00 |
| Labor (full install) | hr | 32 | $80.75 | $2584.00 |
| Estimated Total | $12,964.00 | |||
* Prices are estimates based on St. Louis market rates. Actual costs may vary based on project specifics.
Estimate
Ref ID: EST-2026-YXGL
Date Issued
May 6, 2026
Client
Project Details
Site Address
Start Date
End Date
Scope of Work
Materials
| Material Specification | Units | Amount | Ext. Total | |
|---|---|---|---|---|
$ | $6,276 | |||
$ | $3,192 | |||
$ | $912 | |||
$ | $2,584 |
Labor
| Service Specification | Type | Hrs | Rate | Ext. Total | |
|---|---|---|---|---|---|
Craftsmanship Guarantee | $ | $600 |
Contractual Agreements & Conditions
Total
$13,564
Draft
Frequently Asked Questions — Flat Roof Installation in St. Louis
How much does flat roof installation cost in St. Louis, MO?
The average cost for flat roof installation in St. Louis, MO ranges from $11,019 to $14,909, depending on project scope, materials, and labor rates. St. Louis costs are close to the national average.
How do I get a free flat roof installation estimate in St. Louis?
Use Brixor's free online estimate generator above. Enter your project details, customize line items for your specific needs, and download a professional PDF estimate instantly. No signup or credit card required.
What factors affect flat roof installation costs in St. Louis?
Key factors include project size and complexity, material quality, labor rates in St. Louis (MO), permit requirements, accessibility of the work area, and seasonal demand. Getting multiple estimates is recommended.