Darryl Keil Last Activity 2025-09-09 11:09 AM
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Patrick McMahon

Posts: 3

Joined: 2006-10-19

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Subject : exterior door substrate (core)
Posted : 2009-09-11 6:52 AM
Post #35699
Hi I'm making a pair of exterior doors, 3' slabs, 1 3/4" thick veneered in teak. Any advice on what to use as a core?
Thanks


 
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Darryl Keil

Posts: 1455

Joined: 2003-05-22
Location: Maine

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Subject : RE: exterior door substrate (core)
Posted : 2009-09-13 7:17 PM
Post #35705 - In reply to #35699
Patrick,

There are a number of choices you could do for this but if I was doing I would use 3/4" MDO with a 1/4" sheet between the two. MDO is a product designed for exterior use with a great surface for veneering on.

Darryl Keil


 
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Patrick McMahon

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Joined: 2006-10-19

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Subject : RE: exterior door substrate (core)
Posted : 2009-09-14 6:20 AM
Post #35706 - In reply to #35705
Thanks, I've used the MDO before, just not quite that large of surface. Would you recomend unibond for the teak and the MDO ? Now that I look, It is HDO that is available easily to me, will that be o.k. or am I safer sourcing some MDO?
thanks for your help
Patrick


 
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Brad

Posts: 87

Joined: 2008-04-22

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Subject : RE: exterior door substrate (core)
Posted : 2009-09-29 11:27 AM
Post #35719 - In reply to #35699
What skin thickness are you planning to use?

I am sure MDO would be great, but it will add a bit of extra weight to the doors. My 32"x80" interior doors weigh 80lbs each and I use spruce glulam cores. I use glulams for since I have a source nearby that treats me well, but I know many who make their own cores using a variety of wood species. Many used TBIII and some I know use West Epoxy. Glulams are manufactured using resorcinol so I know that would be fine for an exterior door.

If you are planning to mortise the doors with a small machine I suggest you be careful what core you use. Even mortising my glulams with a 1hp machine is quite the workout.

Brad
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