So i have been on the mission to look for a stylish modern door that is both beautiful, but also energy efficient, with low air leakage.  I have already thrown out glass doors since its just not the style i want.

Options i have seen so far are

Hammer and Hand custom doors (ridiculously expensive @$12,000+) Not interested in making a door for less. Triple gasketing, fully customizable R value and finish. Lead time unknown. Hoppe 9000 multi point hardware.

ProVia Embarq - Fiberglass doors. Not really customizable beyond sizes and styles shown on website (more traditional styles). European style double gasketing on perimeter. Hardware unknown. 3 week lead time.

Ville Doors: Imported doors from Portugal ($2000-6000)  Aluminum frame "Thermo" with thermal break. Double gasketing, Multi Point locking and European hardware included. 6-12 week lead time.

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Most European hardware engages on all sides pulling the door into the gaskets evenly for a tight seal all around. It's understandable that that adds to the cost as the mechanism is significantly more complex. But those doors can still be mass produced to bring the cost down, because $12,000 are not realistic. Maybe by selling the added security of the advanced locking mechanism clients would be willing to pay a somewhat higher price?

Otherwise the breezeway or mud room entry with double doors as suggested by David Williams is certainly a great option. Depending on sqft cost this can certainly easily add a few thousand dollars to a new construction project as well.

Who is a good manufacturer to talk to in order to request these doors start being made!?  

Does adding Mortise hardware keep door sealed better, or does only a Multi-Point hardware help seal better?

I personally don't have an answer for you and would have to research the web myself.

You could start by contacting forum members in the UK or other parts of Europe for advice for instance. In the title above there is a link to the members, and you can Advance Search by country. There are 53 members in the UK.

I like the idea proposed for a glass entry way on a back porch. Not a front entry though. Front entry is really a curb appeal thing.

double bore locks came about from people wanting cheap hardware. I think Mortise is at least a good step up to hold door closed tighter dont you think?

Definately worth the upgrade to keep door sealed tightly at multiple points. Seems that the hardware adds about $700 to the cost of the door though.

3 point mortice locks are widely used in Europe and do not cost much more here. Combined with a Q-lon weather strip they give a good air seal.

The Scandinavians are probably the leaders in high performance joinery e.g.

Looks like quote i just got back were as follows. $135 for standard emtek double boor prep and hardware. $402 for mortise lockset and prep. $575 for Mortise with multipoint lock.

William, Can you explain a Q-Lon weather strip, and how this may be different than what may be provided by most door manufacturers? Do these cost more, do i need to specifically ask for this from my door builder?

Can most door builder prep the jamb like european doors with double gasketing like the Provia?  What is that jamb stylee called?

Nordan looks great! Thats what i would want. Wish these guys had a stocking distributor in the US!  Any ideas?

Attached is the best I can do. I once saw a pin router for sale on Craig's list explicitly

designed for field cut installs. Your builder should be tooled up for doing this.

I would be interested in the outcome of all this.

Best of luck.

Q-Lon is made by Schlegel and is made of polyurethane foam covered in polyethylene so it is resilient as well as tough and will seal a gap of 5 to 7.5mm.

The Aquamac 21 type is fitted to a thin slot in the face of the door frame stop.

Provia seem to be using Q-Lon as the main seal.

On this Passivhaus retrofit in Santa Cruz ( we used Plastpro ( The have triple point latches as an option. They worked out pretty well and were reasonably priced.

Oh, and to eliminate the leaky "sweep" gasket at the sill, we used an outswing door (with a bumper sill) installed backwards. Note that this only works under a deep porch, since the "inside" of an outswing door will not shed rainwater. I also researched something called the "Hydrosill," but didn't use it. It is important to have a good seal all the way around if you want good performance, so don't forget the sill!

Thanks Graham, There is a distributor in Portland for them. Thanks for the link to the blog. 


How did this Plasproinc door cost?  Do you have any photos you can share a link to?


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