By the Gladiator Window & Doors Technical Team — factory-direct aluminum door and window manufacturers, Jacksonville, Florida.

A door spec sheet — sometimes called a cut sheet or submittal sheet — is the single document that determines whether a project goes smoothly or generates costly field surprises. Yet many contractors and designers skip straight to the price. This guide walks you through every section of a typical aluminum door spec sheet so you can evaluate performance claims, catch spec gaps before ordering, and protect your margin on every job.

What Is a Door Spec Sheet and Why Does It Matter?

A door spec sheet is a standardized technical document that captures every performance, dimensional, and material attribute of a door system before it is manufactured or installed. It matters because it is the legal record of what was ordered, the reference document for code compliance, and the benchmark for installation tolerances. On impact-rated projects in Florida and other coastal states, the spec sheet is also the submittal document reviewed by the Authority Having Jurisdiction (AHJ). A missing or vague spec sheet is the number-one cause of code-board rejections and costly reorders.

What Are the Major Sections of a Door Spec Sheet?

Every well-structured spec sheet follows a predictable anatomy. Understanding each section in sequence prevents misreadings and missed requirements.

1. Product Identification Block

Located at the top of the sheet, this block captures the manufacturer name, product line or series name, model or SKU number, and the revision date. Always check the revision date — manufacturers update sheets when ratings change, and installing a product to a superseded sheet voids warranty and may fail inspection.

2. System Configuration Table

This table defines available configurations: number of panels, opening direction (inswing/outswing), stacking options (left, right, center), and whether the system is a single-, double-, or multi-track design. For bi-fold doors, this section will specify minimum and maximum panel counts (typically 2–8 panels) and total system widths. For sliding glass doors, it will note the number of active versus fixed panels and stack direction.

3. Dimensional Tolerances

This section lists the rough-opening requirements (width × height), frame depth, sill profile height above finish floor, and wall-thickness range. Always cross-reference these numbers with your structural drawings before ordering. A sill that is 1.5 inches taller than what the architect drew will require a recess in the concrete or a ramp detail — both are change orders.

4. Thermal Performance Block

This is the section most contractors misread. It contains U-factor, Solar Heat Gain Coefficient (SHGC), and Visible Light Transmittance (VT), each reported as a whole-product (fenestration) value, not just the center-of-glass value. Whole-product values are always worse (higher U-factor, different SHGC) than center-of-glass values because they account for the frame and edge-of-glass conductance. If the spec sheet only shows center-of-glass values, treat the performance claims with caution.

5. Structural Performance Block

Structural performance is reported as a Design Pressure (DP) rating in pounds per square foot (psf), split into positive pressure (wind pushing in) and negative pressure (wind pulling out). This value is what AHJs verify against the project's wind-load analysis. Some sheets also list an Air Infiltration rating (cfm/ft²) and a Water Infiltration rating (psf at which water penetration begins).

6. Glass Specification

Glass specs include nominal thickness, makeup (monolithic vs. laminated vs. insulating unit/IGU), interlayer type (for impact glass), and any coating (Low-E, reflective). This section is critical: a system rated for impact with 6mm laminated glass is not equivalent to one using thinner or un-laminated glass, even if the frame is identical.

7. Hardware and Finish Schedule

This section lists handle sets, locking mechanisms, hinges or pivot hardware, and available finish options. On premium aluminum systems, finish is specified by RAL color code or anodize class.

8. Certification and Listing Block

Lists third-party test reports (AAMA, ASTM, Miami-Dade NOA, Florida Product Approval number). This is the section the building department will stamp. If this block is blank or references only internal testing, the product may not be accepted for permit.

What Do the Key Performance Specs Actually Mean?

The following metrics appear on nearly every aluminum door spec sheet. Here is what each number means and what to look for.

U-Factor

U-factor measures the rate of heat transfer through the entire door assembly, expressed in BTU/(hr·ft²·°F). Lower is better. A U-factor of 0.30 or below is considered thermally efficient for aluminum-framed systems. Gladiator doors use a continuous thermal-break aluminum extrusion that interrupts the conductive aluminum path between interior and exterior, yielding competitive whole-door U-factors. Verify that any U-factor on a spec sheet is the NFRC whole-product value — some manufacturers report only the glass unit's U-factor, which can be 30–50% lower than the true whole-door number.

SHGC (Solar Heat Gain Coefficient)

SHGC measures how much solar radiation passes through the glazing into the conditioned space, on a scale of 0 to 1. In Florida and other hot climates, building codes (IECC Climate Zones 1–2) typically require SHGC ≤ 0.25 for large glazed openings. Low-E coatings on the inner lite of the IGU are the primary means of achieving low SHGC without reducing visible light. Check that the SHGC on the spec sheet matches the specific glass package being ordered, not a generic value for the frame system.

Design Pressure (DP) Rating

Design Pressure is the structural wind-load capacity of the door system in pounds per square foot (psf), tested to ASTM E330. The rating has two components: positive DP (wind pressing the door inward) and negative DP (wind pulling outward, the more demanding condition for outswing doors). A product rated DP +40/-50 can withstand 40 psf inward pressure and 50 psf outward pressure. Florida's High-Velocity Hurricane Zone (HVHZ) — Miami-Dade and Broward counties — requires products with Miami-Dade Notice of Acceptance (NOA). Projects elsewhere in Florida need a Florida Product Approval (FL#). Always match the DP rating to the project's site-specific wind analysis, not just a generic "hurricane rated" claim.

Air and Water Infiltration Ratings

Air infiltration is measured in cubic feet per minute per square foot of frame area (cfm/ft²) at a specified pressure differential. AAMA requires ≤ 0.3 cfm/ft² for casement and sliding products. Water infiltration is the pressure (psf) at which water first penetrates the system, tested per ASTM E331 or E547. Higher water infiltration ratings mean the system manages wind-driven rain at higher wind speeds — important for coastal and elevated installations.

Panel Limits and Maximum Spans

Every multi-panel system — bi-fold, multi-slide, or storefront — has a published maximum panel width, panel height, and total system width. Exceeding these limits voids the structural rating. For bi-fold doors, individual panel widths typically range from 18 inches to 36 inches per panel, and total system widths can reach 24–32 feet depending on panel count and structural framing. Gladiator's bi-fold systems support up to 8 panels in a single run. Panel height limits are usually governed by the DP rating — taller panels at the same width face higher moment loads. Never exceed the published envelope without a custom engineering analysis.

Glass Thickness and Makeup

Gladiator doors ship standard with 6mm glass — thicker than the 4mm or 5mm glass common in imported thin-frame systems — providing greater structural rigidity, better sound attenuation, and a more substantial feel. Impact-rated configurations use laminated glass with a PVB or SGP interlayer. The spec sheet should state: total IGU thickness, individual lite thickness, airspace or argon fill width, interlayer type, and Low-E coating position (surface 2 or surface 3 of the IGU).

Spec Field	What to Look For	Red Flag
U-Factor	Whole-product (NFRC) value ≤ 0.30 for thermally broken aluminum	Center-of-glass only; no NFRC label
SHGC	≤ 0.25 for Florida/hot climates; tied to specific glass package	Generic value not linked to glass option selected
Design Pressure	Positive and negative DP both stated; matches site wind analysis	"Hurricane rated" with no psf value or test report
Glass Thickness	6mm minimum; laminated with interlayer type specified for impact	4mm or thinner; no interlayer listed
Air Infiltration	≤ 0.3 cfm/ft² at standard test pressure	No value listed; tested at non-standard pressure
Water Infiltration	Pressure rating (psf) stated with ASTM test standard	No water rating; references only internal test
Panel Limits	Max panel width, height, and total system width clearly stated	Only total width given; no per-panel limit
Certifications	FL Product Approval # or Miami-Dade NOA # listed	No third-party listing; "testing in progress"
Warranty	Minimum 10 years structural; Gladiator offers 15-year warranty	1–5 years; "limited" with no stated coverage scope
Lead Time	Published lead time from factory; shipping terms stated	No lead time; "subject to change"

How Do Gladiator Spec Sheets Compare to Typical Market Offerings?

The table below positions Gladiator's documented specifications against common product archetypes in the market. No competitor is named — the comparison is by system type and material category.

Spec Category	Gladiator Factory-Direct	Traditional Top-Hung Folding Systems	Wood-Clad Folding Systems	Imported Thin-Frame Aluminum
Frame material	Thermal-break aluminum extrusion	Aluminum, varies by thermal break	Wood interior / aluminum exterior	Aluminum, often no thermal break
Standard glass thickness	6mm standard	Typically 4–5mm	Typically 4–5mm	Typically 4mm
Whole-door U-factor	Competitive thermally broken value; NFRC labeled	Varies; not always NFRC whole-door	Lower U (wood insulates) but higher moisture risk	Often higher U; center-of-glass only reported
Florida Product Approval	Available; verify current FL# on order	Varies by product line	Limited; wood-clad has moisture compliance issues	Often absent or pending
Track profile	Low-profile flush sill standard	Often raised top-hung track	Bottom-roll or top-hung; varies	Variable; often raised threshold
Warranty	15-year structural warranty	Typically 10 years	5–10 years; wood maintenance conditions apply	1–5 years; limited coverage
Shipping	Free nationwide; factory-direct	Dealer network; freight charges vary	Dealer network; white-glove surcharges common	Port-to-dealer; import lead time unpredictable
Pricing model	No dealer markup; factory-direct trade pricing	Multi-tier dealer markup	Multi-tier dealer markup; premium material upcharge	Low list price; hidden freight and duty costs

What Should You Check Before Placing an Order?

Use this checklist on every project before submitting a purchase order. Each item maps directly to a field on the spec sheet.

Pre-Order Spec Sheet Checklist

• Rough opening dimensions confirmed: Width and height match structural drawings within the manufacturer's published tolerance (typically ±¼ inch).
• Wall thickness in range: Frame depth accommodates the wall assembly — exterior cladding, sheathing, stud, and interior finish combined.
• DP rating ≥ site wind load: Pull the wind-load analysis for the project address and confirm the door's positive and negative DP ratings exceed the site requirement with a margin.
• Florida Product Approval number confirmed: Verify the FL# is current and covers the exact configuration ordered (panel count, glass type, finish). A rating for a 6-panel system does not automatically cover a 4-panel system at a different size.
• Glass package tied to energy compliance: SHGC and U-factor for the selected glass package meet the project's IECC or local energy code requirements. Get this in writing from the manufacturer.
• Sill height and ADA clearance: Confirm the sill profile height, threshold height, and whether the installation requires a recessed sill pocket or transition strip for ADA compliance.
• Panel count and width within published limits: Each panel's width and the total system width are within the manufacturer's structural limit for the specified height.
• Hardware and finish match project spec: Handle style, lock type, and RAL finish are confirmed in the order documents — finish changes after production are not possible.
• Lead time mapped to project schedule: Factory lead time confirmed against the construction schedule with buffer for shipping transit. Gladiator's factory-direct model eliminates dealer-distribution delays.
• Warranty documentation in hand: Warranty certificate or written warranty terms are in the project file before installation begins. Gladiator provides a 15-year structural warranty.
• Installation instructions reviewed by installer: The installer has read the manufacturer's installation guide — particularly flashing, sealant, and anchorage requirements — before the rough opening is framed.

Where Can I Get Gladiator Spec Sheets for Submittal?

Gladiator Window & Doors provides full technical submittals — spec sheets, performance data, and installation guides — directly to trade account holders at no charge. Our factory-direct model means you talk to the people who built the product, not a regional rep who relays questions. Wholesale and reseller partners get priority access to updated submittal packages as product lines evolve.

Relevant product collections with available spec documentation:

• Gladiator Bi-Fold Doors — up to 8 panels, thermal-break aluminum, 6mm glass standard, low-profile flush sill
• Gladiator Sliding Glass Doors — multi-slide configurations, factory-direct lead times, nationwide shipping
• Gladiator Pivot Doors — oversized single-slab pivot systems, architectural hardware included
• Folding Passthrough Windows — counter-height bi-fold window systems for indoor-outdoor bar and kitchen applications

For spec sheet review, custom configuration support, and pre-submittal consultation, apply for a Reseller & Wholesale Account and a Gladiator technical representative will follow up with your full submittal package.

Also see our related guides: How to Choose a Folding Glass Wall System, Aluminum Door Finishes: RAL Color and Anodize Guide, and Florida Impact Door Code: What Contractors Need to Know for deeper dives into specification decisions.

Sell Gladiator doors at a wholesale price. Factory-direct aluminum sliding, bi-fold, and pivot doors — premium aluminum, 6mm glass, low-profile tracks, no upcharges, shipped nationwide. Contractors, builders, designers, and retailers get trade pricing and real support.

Apply for a Reseller & Wholesale Account · Call 904-822-1078