Are you planning on staining the doors or painting them?

You want solid wood doors. Solid wood does not contain urea formaldehyde, which is used in manufacturing composite materials. All you need to do is avoid the words composite, wood core, or molded.

Example: Jeld-Wen and look at

Wood

Authentic Wood Interior Doors
(11)

Custom Wood Interior Doors
(55)

Thank you! We will check the lumber yard then. We plan to stain the doors. I checked TruStyle and Simpson, but they seem to be engineered woods. Also Jeld-Wen custom and authentic wood series seem to be engineered woods as well (though I am not 100% sure of this).

Consider recycled doors too. Depending where you're located, there can be some surprising bargains that a good trim carpenter can cut to size if necessary. And if there are only a few doors needed you may get complete matches. Or just use an unusual door or two as features.

We used sun mountain doors. Pretty sure they are solid wood

IMO TruStile in Colorado is the best door maker. They offer 16 wood species, an incredible online design tool with all the right options, factory finishes and FSC environmental certification. They will be better than the a custom door and cost less although considerably more than Simpson, etc.

When you say solid wood door, do you mean NOT a stave core door? If the rails and stiles are solid wood (from one piece), you are right that they will not have been glued up like a stave core stile. However, the frame will still be glued together as well as the panels. There are lots of sources for doors.

I think you'll have to call each manufacturer or mill and ask about the adhesive used.

I'm assuming you have health concerns? As a wood adhesive, commercial glues shouldn't be a major contributor to indoor pollution once cured. Nothing like the off-gassing of a surface coating. What finish are you going with for the doors?

Practically all door builders use stave core construction. It yields a far more stable door than one built with single board rail and stiles. JDS's picture of the TruStile door shows the stave core construction.

Maybe your custom door-maker is pricing in a stiff warranty at $2,000 in case your solid doors twist and warp.

We are going to stain the door. I am concerned about formaldehyde offgassing for years causing poor air quality. Thanks so much for the education, it seems that 100% solid wood doors are less stable than a Trustile door? I emailed Trustile dealer to ask for a quote.

Another vote for Trustile- That's all I have. A solid core, MDF product was recommended for a variety of reasons, including energy efficiency and good for our climate conditions- warm to hot, freeze maybe once a year, custom made to size, stainable and available in all styles. Apparently, they work just as well in "opposite" climates.

I'm extremely pleased. The only thing I caution against is sliding doors- we have them in a small guest room/office with 10 ft ceilings. They are SO very, very heavy, were hard to mount and take a bit of "oomph!" to open and close.

The company also has a focus on "green building". If they prime, it's a no-VOC product. They also have 11 custom stains, if you want them to do it- and a good rep in the historic neighborhoods around me for matching seamlessly to others in the home.

They also participate heavily in LEED certification- a commercial thing- but for a small up-charge, you can dictate a no-added formaldehyde MDF option that contains no urea-formaldehyde resin. A company committed to green building is always good to have on your side. If for any reason, you're chasing a 4 or even 5 star energy rating, these doors put you all the way up the scale.

Something to investigate, for sure. One more thing- We had a couple of doors show up not to specs. The company saw the paperwork, admitted the mistake (through our contractor), put in a new order- and the new doors, proper size, were received in 3 days.

Good luck, and check back.

We had trustile doors in the house we just sold. They were mdf painted white. They were beautiful doors and very heavy. Also expensive. I would love to use them again if I can justify it.

we used Bravura doorknobs and hinges. The screws that came with the hinges were totally inadequate for these heavy doors.

anyone that uses these doors needs to use long screws on the hinges.

With doors and windows you get what you pay for. Another vote for Trustile, best American made doors I've used yet.