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 Post subject: Patio Door Slider - Provia or Okna
PostPosted: Mon Oct 02, 2017 12:10 pm 

Joined: Mon Oct 02, 2017 11:58 am
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Hi everyone, I am looking into a new patio door. It seems that both Provia and Okna are pretty highly regarded. Can anyone discuss pros and cons between these two? The door I will be replacing is 72 x 80 basement walkout. It is hard to find numbers like U-factor on a door like this.

Also, one concern for me is how wide an opening will I have with respect to each door. This is a door I will occasionally need to move major appliances through (washer, dryer, furnace equipment etc.). I will need a minimum of 28 inch opening for these appliances.

Another thing is the screen. Provia has a hanging screen from the top, not sure about Okna. Is a hanging screen a desirable thing?

Thank you for your input.


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 Post subject: Re: Patio Door Slider - Provia or Okna
PostPosted: Mon Oct 02, 2017 1:08 pm 
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Joined: Wed Apr 04, 2007 11:21 pm
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Location: DC Metropolitan Area-Maryland/Virginia/DC
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Both are well regarded brands.

A 6' SGD will give you an opening size of 27.75" without modification. You can take off the hardware and open it all the way up as well as remove the panel with the proper tools.


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 Post subject: Re: Patio Door Slider - Provia or Okna
PostPosted: Mon Oct 02, 2017 2:10 pm 
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Joined: Tue Feb 16, 2010 6:14 pm
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Location: Milwaukee, Madison areas
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Both are good to great. I personally prefer the Okna model primarily due to the welded frame where the Provia is mechanically fastened. That is not a deal breaker IMO, but I try to stay away from mechanical fastening on vinyl products wherever possible. Those seams can open over time creating potential air or water infiltration, this is why vinyl windows went to fusion welding. The frame is admittedly less of a concern in this regard however than the sash panels would be. The provia has a top hung screen, the Okna has rollers on both top and bottom. Both of those designs are good to prevent binding.
If these are offered through different dealers, I'd add installation quality and dealer reputation into your decision making process as again, they are both good products.

As far as the clearance, the Okna can go a little past 28" if you remove the rubber bumpers that are installed with the intent to protect the hardware. I'm not sure of the clearance on the Provia


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 Post subject: Re: Patio Door Slider - Provia or Okna
PostPosted: Tue Oct 10, 2017 4:26 pm 

Joined: Mon Oct 02, 2017 11:58 am
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Thanks for the information but odd that no one is familiar with the Provia opening clearance? Anyhow, I have another question about the critical numbers for each brand.

Consider a standard 72x80" sliding door with two glass panes, argon gas, soft low-E coating, and most energy efficient spacers and insulation (in the frames) can you specify for each brand (Provia and Okna):

1. U value
2. SHGC
3. Visible transmittance
4. Condensation Resistance
5. Air infiltration
6. Water penetration mph
7. Structural integrity mph
8. estimated R value

Thanks you!


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 Post subject: Re: Patio Door Slider - Provia or Okna
PostPosted: Wed Oct 11, 2017 6:55 am 
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Joined: Wed Apr 04, 2007 11:21 pm
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Location: DC Metropolitan Area-Maryland/Virginia/DC
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I can guess that the clearance on the Provia is going to be +/- 1-2" of the Okna, but if you want a real number...you are going to have to call Provia or the dealer that presented you with that product. They should have that number handy.

#1 & #8 are the same data point.

The remaining items can be compared via the NFRC label and the AAMA test report. Like the opening clearance, both of those should be readily available via your dealers on both products.

I can tell you about the Okna (given that is one of the SGD that we sell), but I personally have not sold a Provia SGD and I also don't know how they are quoting the Okna (i.e. options) so I cannot tell you what the NFRC data would be without knowing some options.


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 Post subject: Re: Patio Door Slider - Provia or Okna
PostPosted: Wed Oct 11, 2017 6:20 pm 

Joined: Mon Oct 02, 2017 11:58 am
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I haven't spoken to a dealer yet. So what options do you need to know about?


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 Post subject: Re: Patio Door Slider - Provia or Okna
PostPosted: Thu Oct 12, 2017 6:06 am 
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Easiest thing to do in order to get most of that data would be to ask them for the CPD (Certified Products Directory) Number. The CPD# gives you all the thermals, VT, SGHC, and other NFRC data.

After that, ask they for the AAMA data on the structural testing.


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 Post subject: Re: Patio Door Slider - Provia or Okna
PostPosted: Thu Nov 02, 2017 12:04 am 

Joined: Wed Nov 01, 2017 1:56 am
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We are also confused with the same. We are planning to give an Asian touch to our house and we will be using Shoji screens as patio door slider screens.


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