Scandinavian door information

[Halo Jones]

Hi All,

My BCO has asked for some U-values for some existing doors and windows we have as part of an overall calculation.

Our back door was fitted by the previous owner and only has the following information.

I can only find Scandinavian websites and google translate is not working so well on the site. Can anyone give me some information?

Thanks,

H.

 

[Woody2Shoes]

Hi - I'm no expert, however I'm pretty sure the figure quoted on the label is "Air leakage" i.e. air-tightness - being less than 5.6 cubic metres per square metre of door at a pressure difference of 300 Pascals.

It looks like the company is no longer in business: https://gulasidorna.cybo.com/SE-biz/nordbo-d%C3%B6rr-ab

Maybe the best thing is to identify the basic contruction details, then find a few similar doors (that have published specs) and take a mid-value/average.

I think that BEVIS Nr 3904/92 refers to an EU type approval/regulation that seems pretty broad.

I think that SITAC refers 1422 to a Swedish Technical approvals body (possibly relating to the metal components).

Cheers, W2S

 

[dickm]

Being just returned from a week in Norway, can confirm the air leakage translation. It's just possible the door is similar to our Swedish made front and back doors and if so, somewhere in the house spec there are probably detals of thermal characteritics. Can look tomorrow, but any U-value will depend on glazing as well as door contruction. Can you give a bit more detail?

 

[heimlaga]

Swedish is my native language.

Nordbo Dörr does not seem to be existing under the same name anymore. There has been some sort of merger or reconstruction and at least some parts of the business seem to survive as:
Dooria Gagnef AB
Tjärnavägen 16, 785 30 Gagnef
phone 0320-198 00

Gagnef is a very large village or small town in Dalarna.

"ST7" is probably a type designation.
"Tillv. nr" means "Production number".
"Luftläckage" is "air leakage".
"Typgodkännande bevis nr 3904/92" means "type approval 3904/92. That was the Swedish system of approval before the introduction of theese bloody CE approvals.
Here is a link with contact information to the holder of the approval:https://www.sp.se/sv/index/services/certprod/certprodprofil/bygg/dorrar/ytterdorrar/Sidor/default.aspx?certsearch=A90140
The contact information is:
Diedenporten AB
Industrigatan 3
280 60 BROBY
tfn: 0479-178 00 fax: 0479-178 29
e-post: [email protected]
hemsida: http://www.ekodoor.se

The product description states:
Product name: Exterior doors designated ST7 EI30, ST7 E60 och ST9 EI30/Rw 40dB. Non-glazed single doors, max size outside jambs 1090×2190 mm. Intended use: Sectioning doors between fire cells in buildings.

"Sitac 1422" is the type approval concerning fire resistance. Here is a link to the particular certificate:
http://www.robust.se/images/pdf/cert-ty ... 905-92.pdf
The doors are fireproof for 60 minutes.

 

[Harbo]

Why do doors open outward in Sweden?

Rod

 

[MattRoberts]

Why do doors open outward in Sweden?

Rod

Security? Try breaking through a door that opens outwards

 

[RobinBHM]

It would seem your back door is a fire rated door not external door, so probably wont be thermally rated.

Prob easiest to tell bco it is 1.8u value or (1.6 if in Scotland).

 

[heimlaga]

Two reasons.

-It is easier to get out when the house is on fire
-Driving rain doesn't find it's way in under the door into the floor insulation.

In the old days all house doors opened inwards. The first log that runs under the threshold is always rotten. Often the ends of the second log as well as they butt up against the door jamb. Very often the floor rotted out just inside the door.

 

[Halo Jones]

Thanks for all the help, especially heimlaga. A few more pics of the construction to see if it helps:

External shot:

Edge shot - note the sheet metal strip:

Taking the letter box off you can see that the centre appears to be a large polystyrene sandwich!

Detail of double glazed window:

From the construction I could guesstimate the U-value but it would be nice to have some form of documentation.

Heimlaga - was there an e-mail address for the merged company? I would feel more comfortable writing to the company than ringing them!

Thanks again,

H.

 

[Beau]

Is that not a triple glazed panel? Looks like there are two spacers.

 

[davin]

I often ask myself why doors open outwards in Finland and Sweden.
Usually when I arrive at our cottage in winter to find a metre and a half of snow banked up against it!
Saying that an elderly neighbour heard we were coming last winter, she very kindly cleared all the snow from the drive, not bad considering it was about a metre deep,30 metres long minus 20 in she is in her seventies .

 

[heimlaga]

That door is definitely not a fire proof door. Strange to find all those references to fire proof doors on a polystyrene filled exterrior door.

I have searched today and could not find any e-mail adress to Dooria Gagnef AB. However I found that the business had been bought by the American company Jeld-Wen and will close down in late june or eary july 2016.
Buying and closing down is the trademark of modern capitalism.......... and you may be too late......

 

[Woody2Shoes]

I think it's important to remember that, as part of an overall calculation, an error in the assignment of a U value to the door is unlikely to have a big impact on the result - if necessary you could add elsewhere to compensate for any uncertainty. The door seems to have a triple-glazed panel, to include thermal insulation and to have been designed to meet standards re. air-tightness - i.e. it is a well-designed, well-made door that almost certainly exceeds the performance of most UK-made doors. It unlikely to "let the side down" if its U value ends up being assumed to be slightly different from what it actually is.

This is an imprecise science anyway. I genuinely think the quickest way to get a result is, as I said earlier, to find some current examples which are comparable, and have published specs, and to take a range of values from these to derive a mid-point/average figure - which is bound to be good enough for the BCO's purposes, if you've stated your assumptions/working.

Cheers, W2S

PS there's more than one reference to ST7 here: http://www.ekodoor.se/?p=dorr_faktablad

 

[dickm]

Hi All,

My BCO has asked for some U-values for some existing doors and windows we have as part of an overall calculation.

Our back door was fitted by the previous owner and only has the following information.

I can only find Scandinavian websites and google translate is not working so well on the site. Can anyone give me some information?

Thanks,

H.

That is my front door, except that for airtightness, we don't have a letterbox! Can confirm that it is triple glazed and seems pretty efficient thermally. My label shows exactly the same manufacturer and symbols. It was supplied by a company called Thomas Hedlund in Sweden, but pretty sure they have disappeared into another ptedator.
I'll have a hunt through the specs in case there is any relevant info.
And yes, outward opening too - always surprises visitors when you throw the door open and sweep them off the step!

 

[dickm]

Gone through the mass of documentation concerned with our house, which was built in 1999, but no specific information about the actual doors. The specs give U values for the walls of 0.18Wm-2 and for the triple glazed windows of 1.90 Wm-2, which suggests that the actual door should certainly have a U-value less than 1.9 as others have suggested.
The UK agents for Hedlunds were in Crowborough and the guy there was certainly still active about 5 years ago when I contacted him about the roof trusses. I'll PM the details to the OP separately.