Complete coverage details, claim submission, status tracking, installation resources, and warranty FAQ — all in one place.
Coverage terms below are summaries. Complete warranty terms are contained in documents shipped with your product. In the event of conflict, the product warranty document controls. All warranties are limited for the original purchaser; transfer terms vary by product line.
| Product Line | Frame / Structure | Glass Seal | Hardware | Finish | Transferable? |
|---|---|---|---|---|---|
| Vinyl Windows | Limited Lifetime | 20 Years | 10 Years | — | Yes (reduced terms) |
| Entry Doors | Limited Lifetime | N/A | 1 Year | Painted 5 yr · Primed 1 yr | Yes (reduced terms) |
| Patio Doors | Limited Lifetime | 20 Years | 10 Years | — | Yes (reduced terms) |
| Vinyl Siding | Limited Lifetime | N/A | N/A | Color / Fade: Lifetime | Yes (50% coverage after transfer) |
| Trim & Accessories | 10 Years | N/A | N/A | 10 Years (corrosion / color) | No |
| Impact Products (HVHZ) | Limited Lifetime | 20 Years | 10 Years | — | Yes (reduced terms) |
Improper installation voids coverage. Products must be installed per Cornerstone Building Brands published installation instructions and applicable building codes. Field-modified or altered products are excluded.
Call our warranty team with your claim reference number: 1-800-555-0190 (Option 2), Mon–Fri 7:00 AM – 6:00 PM CT.
Can't find the document you need? Email [email protected]
We publish these limitations because specifying the wrong product for an application is more costly than specifying a higher-performing alternative at the outset. These are not hypothetical edge cases — they are real installation environments where our standard products require evaluation or substitution.
Vinyl's coefficient of thermal expansion (~0.000034 in/in/°F) is significantly higher than fiberglass or aluminum. In climates where exterior temperatures regularly fall below −20°F (Climate Zone 7–8), repeated freeze-thaw cycling can cause minor frame dimensional changes that affect air infiltration ratings over time. For projects in extreme northern Minnesota, Alaska, or high-altitude mountain environments, we recommend specifying our reinforced vinyl or requesting fiberglass alternatives from our distribution network.
Our vinyl siding uses color-through construction, which eliminates painting as a maintenance requirement but also eliminates painting as a future color-change option. Once installed, the siding cannot be field-painted to a different color — doing so voids the limited lifetime color warranty. For HOA environments where future color changes are likely, or for custom applications requiring a specific paint color, fiber cement is a more appropriate specification.
Standard vinyl siding profiles are tested to FM 4473 Class 4 impact resistance (2-inch steel ball at 90 mph), but direct hail strikes above approximately 1.75-inch diameter at high velocity can cause visible denting or cracking. In historically high-hail corridors (central Texas, Nebraska, Kansas, Colorado Front Range), we recommend evaluating thicker-gauge profiles or discussing fiber cement alternatives. Hail damage is not covered under warranty as it is classified as an impact event, not a manufacturing defect.
All product warranties require strict adherence to Cornerstone Building Brands published installation instructions and applicable local building codes. Common installation errors that void coverage include: improper rough opening flashing, installation without required shims or leveling, caulking over weep holes, and application of incompatible sealants to vinyl frames. These are not uncommon on job sites — download our installation guides before beginning work.
Not all products in our catalog are rated for commercial applications. Our residential window lines are tested to AAMA 101 R (residential) performance levels. Light commercial specifications require products rated to AAMA 101 HC or CW — which are a subset of our catalog. Specifying a residential-rated product in a commercial application that requires HC or CW compliance is a code violation that will not be resolved by warranty coverage.
Independent material comparisons help specifiers make informed decisions. The table below compares key performance and warranty parameters across primary window and cladding material categories based on manufacturer-published specifications and NFRC/AAMA certified test data.
| Feature | Cornerstone Vinyl Window | Fiberglass Window (Industry Avg.) | Wood/Clad Window (Industry Avg.) | Aluminum Window |
|---|---|---|---|---|
| Best U-Factor (double-pane) | 0.17 (triple-pane available) | 0.19 – 0.22 | 0.20 – 0.30 | 0.30 – 0.45 (thermal break) |
| ENERGY STAR Qualified | Yes — all climate zones | Yes — most product lines | Yes — select lines | Limited — mostly commercial |
| Frame Warranty | Limited lifetime (original owner) | Limited lifetime (most brands) | 10–20 years (varies) | 10 years (commercial typical) |
| Glass Seal Warranty | 20 years | 20 years (most brands) | 10–20 years | 10 years |
| Maintenance Requirement | None — no painting | Paintable surface, repaints every 12–20 yrs | Repainting every 5–10 yrs | None — anodized or powder-coat |
| Thermal Expansion (per °F) | ~0.000034 in/in — higher than fiberglass | ~0.0000085 in/in — near glass | 0.0000027 – 0.0000035 in/in | ~0.0000131 in/in |
| Impact-Rated Options | Yes — Miami-Dade NOA listed | Yes — select manufacturers | Rare | Yes — common in commercial |
| Relative Installed Cost (residential) | $$ — mid-range | $$$ – $$$$ — premium | $$$ – $$$$ — premium | $$ (residential) / $$$ (commercial) |
| Feature | Cornerstone Vinyl Siding | Fiber Cement (e.g., HardiePlank) | Engineered Wood Siding | Aluminum Siding |
|---|---|---|---|---|
| Installed Cost (approx.) | $3 – $8 / sq ft | $6 – $14 / sq ft | $5 – $10 / sq ft | $4 – $9 / sq ft |
| Fire Rating | Class A (with gypsum sheathing) | Class A — inherent | Class B or C (varies) | Class A — inherent |
| Moisture Resistance | Excellent — immune to water absorption | Good — requires proper flashing | Moderate — requires sealed edges | Excellent — corrosion-resistant |
| Paintability | No — color-through, not paintable | Yes — factory or field painted | Yes — primed, field painted | Yes — repaintable |
| Hail Impact Resistance | Moderate — dent/crack risk >1.75" hail | High — resists most hail sizes | Moderate — surface damage possible | Moderate — denting possible |
| Maintenance Cycle | None — no painting ever required | Repaint every 8–15 years | Repaint every 5–10 years | Repaint every 15–25 years |
| Color/Fade Warranty | Limited lifetime (original owner) | 15-year finish warranty (varies by brand) | 5–15 years (varies) | 40-year paint warranty (varies) |
Cost ranges are industry averages and will vary by region, contractor, and project scope. Technical performance values are based on manufacturer-published NFRC and AAMA certified test data as of 2024. Consult product-specific data sheets for exact specifications.