Masonite 6 Panel Smooth 80" Molded Panel Door

Worth it for contractors who need reliable interior doors with precise trimming specs. The 1/4” max trimming allowance on height (bottom rail only) and 1/4” on width (each side) gives you just enough room for fine-tuning without voiding the warranty. Solid core models deliver 70% better sound dampening than hollow core — measurable performance that justifies the weight penalty.

Skip it if you need aggressive trimming capability. That quarter-inch limit is non-negotiable, and exceeding it voids the warranty. For non-standard openings that need more modification, look elsewhere.

Trimming Specs and Core Options

The trimming allowance defines what you can and can’t do with these doors. Maximum 1/4” on height from the bottom rail only, and 1/4” on width from each side. That’s your working envelope. Push past it, and the warranty — 5 years for hollow core, 7 years for solid core — disappears.

Core selection comes down to acoustics versus handling. Hollow core runs about 25 pounds for a 26x80 slab — one person can muscle it around easily. Solid core weighs 40-70+ pounds depending on width, but delivers that 70% improvement in sound dampening. For bedrooms sharing walls with living spaces, that acoustic performance matters.

Specification	Hollow Core	Solid Core
Weight (26x80)	~25 lbs	40-70+ lbs
Sound Dampening	Baseline	70% better
Warranty	5 years	7 years
Trimming Allowance	1/4” max (height/width)	1/4” max (height/width)

Sizing and Installation Requirements

Seven width options from 18” to 36” cover most residential applications. Standard 1-3/8” thickness fits typical interior jambs. The smooth primed white finish on all six sides means you’re painting no matter what — but at least they prime the edges.

Slab doors need prep work. Requires routing for hinges and drilling for lockset. Hardware not included. Pre-hung units save labor but need proper rough openings — 2” wider and 2.5” taller than the door slab for 2x4 framing.

The molded panel construction resists warping, shrinking, and cracking better than flat slabs. That smooth surface delivers a clean paint finish without wood grain texture showing through — important when matching existing painted doors.

What Contractors Say

Reviews average 4.3/5 stars based on ~400+ reviews from Lowe’s. Contractors appreciate the classic look and value. The lightweight hollow core version gets praise for easy handling. Main complaint centers on shipping damage and those restrictive trimming limits for non-standard openings.

Applications span residential interior doors for bedrooms, bathrooms, closets, pantries, and utility rooms, plus light commercial partitions where fire rating isn’t required. Fire-rated versions exist for code compliance where needed.

Certifications and Environmental Specs

Masonite typically uses SFI or PEFC certified wood fibers — sustainable forestry practices matter for large-volume products. Many models carry GREENGUARD Gold certification for low VOC emissions, though some retail versions may not include FSC certification by default.

FAQ

What’s the maximum trimming allowance for a Masonite 6 panel door?

Maximum 1/4” on height (bottom rail only) and 1/4” on width (each side). Exceeding these limits voids the warranty — no exceptions.

What’s the actual weight difference between hollow and solid core?

Hollow core weighs approximately 25 lbs for a 26x80 slab. Solid core ranges from 40-70+ lbs depending on width. That’s double to triple the weight for the acoustic performance.

Do these doors come with hardware?

Slab versions require routing for hinges and drilling for lockset. Hardware not included. Pre-hung versions include hinges and jamb but still need the lockset.

What’s the rough opening size for pre-hung installation?

Rough opening should be 2” wider and 2.5” taller than the door slab for standard 2x4 framing. A 30x80 door needs a 32” x 82.5” rough opening.