Alliance Door Products Lynden Door ELEMENTAL Collection - 4-Panel Double Line

The ELEMENTAL Collection 4-Panel Double Line door combines modern CNC-routed grooves with practical specifications that contractors actually need — 6-inch stiles for hardware compatibility, 10-inch bottom rails for ADA compliance, and optional fire ratings up to 90 minutes. The primed MDF surface takes paint beautifully while the precise groove pattern creates visual interest without the fussiness of traditional raised panels.

Fire Rating Flexibility That Actually Matters

Few interior doors offer this level of fire-rating options across the entire size range. The standard door comes with 20-minute fire rating (Category A or B), with optional 45-, 60-, and 90-minute ratings available. That 90-minute rating isn’t restricted to just a few sizes — contractors can specify it across the full lineup from 2’0” to 4’0” widths.

Montana’s multi-family housing boom demands fire-rated assemblies between units. The ability to maintain consistent aesthetics while meeting different fire separation requirements in the same project saves headaches during plan review. No switching door styles just because the corridor needs a different rating than the unit entries.

The fire ratings are UL/WH certified, not just manufacturer claims. That certification paperwork matters when inspectors show up.

Hardware-Ready Design Details

The 6-inch stile width isn’t an accident. This width accommodates most door hardware including standard locks, handles, and exit devices. Too many modern door designs sacrifice hardware compatibility for aesthetics — narrow stiles that force contractors to hunt for special narrow-backset locksets.

The 10-inch bottom rail meets many disability-access (ADA) requirements. Montana’s aging population means more projects need ADA-compliant doors, even in private residences. That extra rail height provides kick-plate clearance without custom orders.

Route lines are positioned to avoid interference with most hardware locations. The grooves won’t interfere with standard bore locations or cause headaches during hardware installation.

Specification	Value	Source
Stile Width	6 inches	Manufacturer
Bottom Rail Height	10 inches	Manufacturer
Groove Width	0.22 inches	Manufacturer
Groove Depth	0.04 inches	Manufacturer
Bevel Angle	45 degrees	Manufacturer

Size Range Covers Real-World Openings

Standard widths run from 2’0” to 4’0”, with greater widths available by special order. Heights come in 6’8”, 7’0”, and 8’0”. That 8’0” option matters for contemporary designs with tall ceilings — no cobbling together transom panels to reach modern ceiling heights.

Both 1-3/8” and 1-3/4” thicknesses are available. The thicker option provides better sound control between rooms and feels more substantial. Bifold configurations are available for closets and utility spaces where swing clearance is tight.

The special-order program for wider doors solves those oddball openings without switching to a completely different door style. Maintaining visual consistency across a project matters more than manufacturers seem to realize.

CNC Precision in MDF

The surface features smooth, bevel-grooved MDF with approximately 0.22” wide x 0.04” deep bevel-route lines. Those aren’t decorative scratches — they’re precisely routed channels that create shadow lines and visual depth. The 45-degree bevel angle catches light differently throughout the day.

MDF takes paint better than most substrates. No grain telegraph, no resin bleed-through, no seasonal movement opening up joints. The surface comes primed and ready for paint — not raw MDF that drinks primer like a sponge.

Core options include both hollow and solid. Hollow core keeps costs down for bedrooms and closets. Solid core provides sound control and a quality feel for offices, bathrooms, and primary bedrooms. The same visual design across both core types maintains consistency while letting contractors match performance to budget.

Frequently Asked Questions

What’s the actual lead time for doors wider than 4’0”? Greater widths are available by special order, but specific lead times aren’t provided in the manufacturer data. Special orders typically add 2-4 weeks to standard delivery schedules.

Can these doors work with pocket door hardware? While the doors are compatible with standard door hardware, pocket door applications aren’t specifically mentioned. The 6-inch stile should accommodate most pocket door hardware, but verify with your hardware manufacturer.

How deep are the grooves compared to traditional panel doors? The grooves measure approximately 0.04” deep — much shallower than traditional raised panel profiles. This creates a subtle shadow line rather than deep recesses that collect dust.

Do the fire-rated versions look different? The manufacturer data doesn’t indicate any visual differences between standard and fire-rated versions. Fire ratings from 20 to 90 minutes are available as options across the line.

What warranty coverage do these doors carry? Warranty varies by series: residential SD series gets 1-year limited warranty, light commercial CD series gets 5-year limited warranty, and architectural LD series gets lifetime limited warranty.