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    • CommentAuthormarsaday
    • CommentTimeMar 15th 2017 edited
     
    Is it possible to make your own roof light ?

    I am looking at using a fixed flat light light this:
    https://roof-maker.co.uk/rooflights/fixed-flat-rooflights/

    My roof will be a flat. The joist and insulation and sheeting will be a depth of approx 270-350mm.

    I can order my own glazing. Just need to make the frame. Was thinking about using dried oak as using oak in the extension. Would look nice. Anyone think this is a bad idea ? Leakage issues with flexing etc ?

    Doing the roof in fibre glass, so the frame which sticks out of the roof a bit could be fibre glassed up. Just need to think about a finish frame maybe over the top.
    •  
      CommentAuthordjh
    • CommentTimeMar 15th 2017
     
    It's certainly possible. I think there are previous discussions on this site. You need an upstand and the details of how to insulate the upstand and connect it to the roof insulation is one of the main decisions. I think typically it is easier to just sit the glass on top of the upstand without a frame. The only useful place for oak is probably as a veneer on the inside if that is what you want.
    • CommentAuthormarsaday
    • CommentTimeMar 15th 2017
     
    Yes i was thinking what would oak on the four sides of the hole in the roof look like as opposed to plasterboard and skim.

    This needs a bit of research. I will have a look on past discussions.
  1.  
    I am sure Tony has posted a detail before.
    • CommentAuthorSigaldry
    • CommentTimeMar 16th 2017
     
    It could look nice, but could also be an awful cold bridge.
    • CommentAuthorowlman
    • CommentTimeMar 16th 2017
     
    Posted By: marsadayYes i was thinking what would oak on the four sides of the hole in the roof look like as opposed to plasterboard and skim.

    This needs a bit of research. I will have a look on past discussions.



    It depends on the finish of the rest of the ceiling. If that is plastered then an "integrated" all plaster look may be best for the reveals.
    You can always line it afterwards with oak faced material if you prefer that look sometime in the future.
    For the box external upstand construct it from double skin with insulation in-between. You can glaze using standard roof glazing components. It won't open of course, but I've never found that a problem.
    • CommentAuthorDarylP
    • CommentTimeMar 16th 2017
     
    make a flat rooflight from 3G IGU, on a sort of ply/OSB top-hat, but bring the ply/OSB upstand inboard of the insulation...
      RoofLightFlatUpstandSimple.JPG
    • CommentAuthorringi
    • CommentTimeMar 16th 2017
     
    Has anyone consider using COMPACFOAM 200 form green building store for the up stand?

    RoofMaker says the 2by3 wood MUST be used above the level of the main roof covering that rather defeats the point of a warm roof.
    •  
      CommentAuthordjh
    • CommentTimeMar 16th 2017
     
    Posted By: ringiHas anyone consider using COMPACFOAM 200 form green building store for the up stand?

    I would think any EPS 200 or greater would be stiff enough.

    RoofMaker says the 2by3 wood MUST be used above the level of the main roof covering that rather defeats the point of a warm roof.

    I don't understand. What 2by3 wood? Do you have a link, please?
    • CommentAuthorringi
    • CommentTimeMar 16th 2017
     
    Its on their installation instructions that I got from their website some time ago.
    • CommentAuthorMarkyP
    • CommentTimeMar 16th 2017
     
    I have the roof maker skylight. I made an insulated upstand myself. I was going use to compacfoam but in the end went with timber. I made the upstands from ply, boxing in insulation. You need a 75mm wide upstand for the roofmaker to screw down onto. The upstand has to be min 25mm above the deck at lowest, but also needs a 3 to 5 degree fall to shed water. I think my upstand is 180mm proud at one and, down to 30mm at the other. The ply facing is a cold bridge, as is the rooflight frame. the frame is thermally broken by a bit of XPS, better than nothing but not great. I cant recall if roofmaker provide a whole window or glazing only u-value.

    Others (Tony, I think) have talked about making the roof light DIY but I dont recall any design details or pics of the finished product, just descriptions of using bits of alu trim and so on. The roof maker is a good product, but isn't cheap. I had way too much on my plate to go the DIY route.
    •  
      CommentAuthordjh
    • CommentTimeMar 16th 2017
     
    Posted By: ringiIts on their installation instructions that I got from their website some time ago.

    that's not a lot of help.
    • CommentAuthormarsaday
    • CommentTimeMar 16th 2017
     
    Thanks for comments, if tony has a detail it will be appreciated (or a link to a past post)
    • CommentAuthortony
    • CommentTimeMar 19th 2017 edited
     
    I am not properly connected, sorry

    The bottom edge MUST have a decent overhang, are least 50mm

    The unit should be stepped at the bottom again the top glass should oversail by 50mm

    There must be no possibility of water getting entrapped against spacer bars.

    Better not touch glass with plasterboard, thin wood trim or something next to glass

    More another day
    • CommentAuthormarsaday
    • CommentTimeMar 19th 2017
     
    Ok, sounds good. Also just read this link this weekend which has some good photos showing instal:
    https://www.diynot.com/diy/threads/panoroof-skylights-are-they-any-good.464262/
  2.  
    ''I am not properly connected, sorry''

    But you know all of us, so of course you are!
    •  
      CommentAuthorfostertom
    • CommentTimeMar 20th 2017
     
    He means his brain-battery is running low - "More another day "!
    • CommentAuthortony
    • CommentTimeMar 20th 2017
     
    He means that he is abroad with very little and very slow web connection, no downloads except in middle of the night.
    • CommentAuthormarsaday
    • CommentTimeApr 27th 2017
     
    Hello again. I am looking in more detail at this topic and have a diagram from panoroof showing how their glass fits onto the roof light.

    It seems pretty straight forward in terms of making an opening in the roof. All i need to make is the upstand which they are supplying (70 x 70mm)with their windows.

    I would look at doing this in a piece of timber routed out. Seems pretty easy.

    Outside, the frame breaking out from the room line will be clad in fibreglass, so it should be well sealed all round.

    The tricky bit was getting the glass made, but i have just spoken to my big local supplier and they can do triple glazed at £65sqm (1.0 u value). It also needs to be toughened and with this extra 6mm piece bonded to the top to allow rain to fall away from the unit. This takes the cost to £98 sqm. So a 2 x 1m unit is about £240. Much cheaper than £700 for a made roof light in triple.

    I may be able to get that price for the glass down as well. So i reckon i can get a room light 2x1m for £300 - pretty good really.

    Do you guys see any flaws in my thinking? I am unlikely to get any insulation into the upstand piece, unless you say otherwise.

    If Tony has any specific link / info on making these windows i would appreciate any link.

    Thanks
    • CommentAuthortony
    • CommentTimeApr 27th 2017
     
    Looks not bad.

    I would definitely want to see insulation equivalent to that in the roof round the upstand.

    I would not fit the glass level, it must be on a fall, then on the two sides and the top I would fit ali or plastic (yuk) over the edges of the glass to act as a drip.
    • CommentAuthormarsaday
    • CommentTimeApr 27th 2017 edited
     
    How do you get insulation into the upstand if it is 70mm in diameter ? I suppose it means making a beefier upstand. This will mean the top glass pane will also have to be even bigger. So if your roof insulation is 150mm, what thickness would you get in the upstand ?

    The box will be formed on a pitch.

    This link has some good photos which shows what someone has done when fitting these windows.

    They have used black sealant where the fibreglass meets the top glazed section. Looks a bit messy, but this isn't to be seen. I think your ali trims would stop a lot of water running through to this junction. What sort of trim would you use, or rather where do you buy it from ?

    https://www.diynot.com/diy/threads/panoroof-skylights-are-they-any-good.464262/
    • CommentAuthortony
    • CommentTimeApr 27th 2017
     
    Simple thin section ali angle, siliconed on to the sides and top, not the bottom, though one siliconed on underneath to stop water tracking into the frame.

    I reckon same u value round the surround as in the roof, theory demands better lots only use half as much.
    •  
      CommentAuthordjh
    • CommentTimeApr 27th 2017
     
    You could use phenolic or even aerogel or VIP in the upstand to reduce its thickness.
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