Introduction
When a client asks for a statement entry door, wrought iron is often the material that wins the conversation. But for contractors and builders sourcing doors for residential or commercial projects in Texas, the decision goes beyond aesthetics. Gauge thickness, glass options, thermal performance, and finish durability all factor into a door that will last decades in the Texas heat and humidity.
This guide covers everything you need to spec and install wrought iron doors with confidence — from material grades to glass selection and frame considerations.
1. Material Specifications: What Actually Matters
Not all iron doors are built the same. When reviewing supplier specs, focus on these key indicators.
Steel Frame Gauge
The industry standard for quality exterior iron doors is 10-gauge galvanized steel. This provides superior dent and impact resistance over thinner 14–16 gauge alternatives, better weld integrity for decorative ironwork attachments, and a longer structural lifespan in coastal or high-humidity environments like Houston and Corpus Christi.
Galvanized steel frames coated with powdered paint offer corrosion protection without the maintenance overhead of raw iron finishes. For exterior applications in Texas, this is a minimum requirement.
Interior vs. Exterior Variants
Iron doors are not universal. Always confirm with your supplier whether a door is rated for the intended application. Exterior single doors require weatherstripping, energy-efficient glass, and reinforced hinges. Exterior double French doors need an astragal, multi-point locking system, and a heavier frame gauge. Interior doors can use a lighter gauge, and glass privacy options vary more widely.
2. Glass Options and Thermal Performance
Glass selection is often the most consequential decision for energy performance, especially in Texas where cooling loads dominate.
Double Pane Tempered Glass
The baseline for most exterior iron door applications. Tempered glass is 4–5x stronger than standard annealed glass, required by Texas building code in many door and sidelight applications, and available in clear, frosted, or decorative patterns.
Double Pane Low-E Glass
Low-emissivity coatings reflect infrared heat while allowing visible light through. For Texas projects, Low-E glass can reduce solar heat gain by up to 50% compared to standard clear glass. It's recommended for south- and west-facing entries and pairs well with ENERGY STAR–rated door assemblies.
Double Pane Solar Glass
A step up from Low-E, solar glass uses a tinted or reflective coating for maximum heat rejection. Best suited for full-glass or high-lite door designs (3-lite, 4-lite, 6-lite configurations) and projects targeting LEED points or energy efficiency incentives.
Frosted Glass
Popular in contemporary and transitional designs. Provides privacy while maintaining light transmission. Specify for interior French doors between living spaces or sidelights adjacent to entry doors where street visibility is a concern.
3. Door Styles and Lite Configurations
"Lite" refers to the number of glass panels in the door. Understanding the options helps you match client expectations to available SKUs.
- 0-Lite — Solid iron panel, no glass. Maximum privacy, security-focused entries.
- 3-Lite — Three glass panels, typically vertical. Traditional and transitional styles.
- 4-Lite — Four balanced glass panels. Craftsman and transitional designs.
- 6-Lite — Six panels, classic French door look. Traditional homes, formal entries.
Top Styles
- Square Top — Clean, contemporary. Works with modern and transitional architecture.
- Round Top — Soft arch. Suits Mediterranean and Spanish Colonial styles common across Texas Hill Country.
- Arch Top — Full arch profile. Traditional and Old World aesthetics.
4. Standard Size Reference for Estimating
Single French Door: Width 37", Heights 80" or 96"
Double French Door: Width 72" (2 × 36" panels), Heights 80" or 96"
Pivot Door: Custom sizing available; confirm rough opening before ordering. Designed for oversized contemporary entries (84"+ height typical).
Bi-fold Door (2-panel): Available in left-to-right or right-to-left swing. Ideal for pass-through openings to patios and outdoor kitchens.
5. Hardware and Finish Considerations
Powder Coat Finish
Powder coat is the preferred finish for Texas exterior doors, providing a thicker film build (typically 2–4 mil vs. 1–2 mil for liquid paint), UV and salt-air resistance, and availability in any RAL color for custom projects.
Hinge Requirements
Heavy wrought iron doors (150–300 lbs for double units) require a minimum of 3 hinges per door leaf, ball-bearing hinges rated for the door weight, and door weight confirmation from the supplier before rough framing.
Multi-Point Locking
For exterior French doors, multi-point locking systems engage at the top, middle, and bottom of the door — essential for hurricane resistance and insurance compliance in coastal Texas counties.
6. Installation Notes
Add 2" to both width and height of the door unit for standard framing clearance. Confirm with supplier whether the quoted size is the door unit or the rough opening.
Texas building code requires a continuous air seal at the threshold. Specify an adjustable aluminum threshold with vinyl seal and compression weatherstripping on all four sides for exterior doors.
Double iron French door units can exceed 400 lbs installed. Ensure the header is properly engineered for the span, and that the subfloor at the threshold is reinforced if applicable.
7. Quick Spec Checklist for Contractors
- Confirmed interior vs. exterior application
- Door size matches rough opening (with 2" clearance)
- Glass type selected based on orientation and energy code
- Lite configuration approved by client
- Top style (square / round / arch) confirmed
- Swing direction confirmed
- Finish color specified (RAL or standard black)
- Hardware package confirmed (multi-point lock for exterior)
- Lead time cross-referenced with project schedule
- Structural header reviewed for door weight
Texas Glass Door supplies wrought iron and steel French doors, pivot doors, bi-fold doors, and a full range of glass types for residential and commercial projects across Texas. Contact us for contractor pricing and lead time availability.