Masonite 6 Panel Smooth 80″

The Masonite 6 Panel Smooth 80″ is a molded interior door that delivers predictable performance. Smooth (primed white, ready for paint on all six sides) makes it simple to match any interior color scheme. Available in hollow core (approximately 25 lbs for a 26x80 slab) and solid core (70% better sound dampening than hollow core; weight ranges 40-70+ lbs depending on width) configurations.

For Montana contractors dealing with open floor plans and sound transfer between rooms, that 70% better sound reduction in the solid core version matters. The weight penalty is real though. You’re looking at triple the weight moving from hollow to solid core.

Core Performance and Weight Trade-offs

Hollow core construction weighs approximately 25 lbs for a 26x80 slab, making installation straightforward for one person. Solid core versions range 40-70+ lbs depending on width — plan accordingly for handling and hinge requirements.

The sound dampening difference justifies the weight penalty in specific applications. Master bedrooms, home offices, media rooms — anywhere noise isolation improves quality of life. 70% better sound dampening than hollow core translates to meaningful privacy improvements. Skip the solid core for closets, pantries, and low-traffic areas where the acoustic benefit doesn’t justify the cost and handling difficulty.

Core Type	Weight Range	Sound Performance
Hollow Core	~25 lbs (26” width)	Standard
Solid Core	40-70+ lbs	70% better sound dampening

Size Options and Trimming Constraints

Available widths include 18”, 24”, 26”, 28”, 30”, 32”, 36” with standard 80 inches height and 1.375 inches (1-3/8”) thickness. That range covers most residential applications without custom ordering.

Here’s where contractors get burned: Max 1/4” trimming allowance on height (bottom rail) and 1/4” on width (each side); exceeding voids warranty. Quarter inch doesn’t give you much room for out-of-square openings. Measure twice, order right. The warranty language is clear — exceed that quarter inch and you own any problems.

Trimming limitations can be restrictive for non-standard openings according to customer feedback. Plan your rough openings carefully or eat the cost of returns.

Installation and Warranty Considerations

The door ships as either a slab or pre-hung unit. Slab versions require routing for hinges and drilling for lockset (bore). Hardware not included. Pre-hung units require 2x4 framing; rough opening should typically be 2” wider and 2.5” taller than the door slab.

Warranty coverage differs by core type. Hollow core slabs come with a 5-year limited warranty, while solid core slabs extend that to 7 years. Any Masonite-applied finishes carry their own 1-year limited warranty. The extended warranty on solid core reflects the premium construction.

Molded wood fiber composite construction resists warping, shrinking, and cracking. Real-world performance backs this up — these doors hold up better than traditional wood panel doors in Montana’s temperature swings.

Frequently Asked Questions

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

Hollow core runs approximately 25 lbs for a 26x80 slab, while solid core ranges 40-70+ lbs depending on width. Plan for at least double the weight when upgrading to solid core.

Can these doors be trimmed more than 1/4 inch if needed?

No. Exceeding 1/4” on height (bottom rail) or 1/4” on width (each side) voids the warranty. Order the right size or modify your opening.

Do these doors carry any environmental certifications?

Masonite products typically use SFI (Sustainable Forestry Initiative) or PEFC certified wood fibers. Many Masonite molded doors are GREENGUARD Gold certified for low VOC emissions.

What hardware comes with the slab door?

Nothing. Slab doors require routing for hinges and drilling for lockset. Hardware not included.

Is the smooth finish ready for paint?

Yes. The smooth surface is primed white and ready for paint on all six sides, allowing for a clean, high-quality paint finish with no wood grain texture.