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Everything posted by yesyes

  1. I would agree with everyone... You're going to bump into that corner, especially in the dark! BTW... Are you trying to beat Gina's record of the longest build thread?
  2. You've probably thought of that already, but I'm glad I marked where the studding is on the top and bottom of the ply and where cables run inside the wall. It made attaching things to the walls much easier.
  3. But your warm room would be 6mm wider.
  4. There are many weird ways of opening the roof... ?
  5. Take it easy for a while... You can carry on next year.
  6. I did but never implemented it. I was worried bout the same thing but for some reason (not sure why) I don't get water in this way. (though it does blow in some fine snow when the weather is just "right"). I'm guessing my runners aren't perfectly straight and water runs off towards the outside. I do have 2 of these huge paint brushes lying around that you would normally use to apply adhesive to wallpaper. Those fit into the opening perfectly. I'll use them if it ever becomes a problem.
  7. Just in case, use a few different sized bolts
  8. At least now you can start work inside if the weather is not good.
  9. It's starting to look like an observatory! Interesting way to do the corners. I don't think I've seen this method before. But may I just don't remember.
  10. I would agree with Gina here. It sounds a lot of effort for potentially very little gain. Better spend the money on better cladding than on OSB and save yourself a lot of work.
  11. I put plastic foil under the cladding for that reason. Ply is of course a better but more expensive way.
  12. You're making very good progress! ? This reminds me of another little mistake I made... I forgot to seal the area I marked in your picture. Once the roof is fully built it is very hard to get there. I should have done that at the stage you are at now. But you probably thought of that... I ended up smearing some black silicone sealant there with my bare fingers but I couldn't really see any more if I covered everything.
  13. This looks great so far! ? Here is a photo of how I dealt with glueing the EPDM over that fixed beam. I only glued the bit upward where that piece of timber touches. The top and down on the scope room side I glued later when the first bit had set and the timber and clamps were removed. This made it easier to get it straight. This would probably be good to use the contact adhesive for.
  14. There is no noticeable deformation. Most of the weight of the roof isn't in the middle of that beam. It's more spread out. My beam is 100 x 50mm and the smaller sloping ones 50 x 50mm. There is 12mm OSB on top and then EPDM. No problems with deformation so far. I do notice a bit of give and take in the timber depending on the weather (humidity mostly, I think). When it's been dry for a while the doors close a bit easier, for example. But that's expected with timber. You just need to account for that and not make things fit too tightly. ? Doors for example but also that captive mechanism. I regret not spending more time aligning all that better before weighing down the roll-off roof.
  15. I've not had anything fall in from the roof (maybe the odd tiny leaf that I didn't notice) and I don't open it when it rains or just after rain when it's still wet. I've not seen a problem with this yet. But it may be different in different surroundings. The alternative is to have the apex rotated 90 degrees, parallel to the roll-off direction. But in my case this would have made the building too high for the 2.5m limit. And I think the captive mechanism on the sides would look weirder ;-)
  16. I did not remove the powder and all was (and is) fine. Remember you need to put the EPDM on the roof for a few hours, ideally in sunshine (yeah, I know... :-) ) and then not move it before glueing. It gets a little softer in the "heat" and takes the shape of the roof. This also smooths the areas where it was folded (mine actually came on a roll, if I remember correctly).
  17. Glad to got it sorted. Did you get to keep the wrong sized sheet? I kept all my offcuts and found them quite useful for all sorts of things. We have a small piece under the dog's food bowl to keep it from sliding, a larger piece as a protective mat on the workbench and so on. ;-)
  18. I didn't know about the contact adhesive when I did my build. I used only the water based adhesive and have not had any issues with it. Except on the south side, my EPDM is just hanging off the roof sheets by about 4 inches / 10cm. It has never lifted off anywhere (my obsy is quite protected from wind though). Though, if I had to do it again, I would probably use some contact adhesive around the edges, just in case. If you want to fold the EPDM around the edges of the roof sheets, contact adhesive is a must, I think. I used it for the roof of my fire wood store (built with left over timber from the obsy build) around 3mm ply and that holds very well.
  19. You're welcome. ? Note the cut-out on the left of the roof frame. This is where the roof frame moves over the rail and didn't clear it. I hadn't thought of that and needed to do this cut-out later with a jigsaw with the captive mechanism of the roof already installed (so no way to lift the roof a bit). That was quite tricky to do. I really wished I had fully tested the roof roll-off before installing the sheets and captive mechanism on the roof.
  20. This is my south side. The black painted (bitumen paint) piece just above the white cladding is the top of the south wall. The one on top of that is part of the rolling roof frame. It overhangs the wall by its own thickness (2 inches, 5cm). The roof overhangs a further 4 inches, 10cm. In 5 years not a drop of water came in that way. Where I did have a bit of water and snow ingress (small amounts of water twice during really heavy rain, a bit of fresh snow blown in each winter) is where the roof rails go from outside (warm room side) to the inside (scope room side). I have a pair of these huge brushes used to put glue on wallpaper lying around that fit these gaps perfectly. But the ingress hasn't been bad enough for me to bother installing them yet. ;-)
  21. Probably... :D I found the single most important thing to learn in Sketchup is Groups. You want every single piece of timber to be its own Group, otherwise everything will stick together and if you try to move something, everything else moves with it in unexpected ways. You also want to nest groups (groups of groups), for example all pieces of timber of one side panel would be a group of groups of pieces of timber.
  22. One more thing... I see you are planning to make the roll-off roof very similar to mine. I'd recommend spending enough time aligning the rails and castors once the roof frame and the captive mechanism on the sides is done, but before you put the roof joists and sheets on. I haven't done than during my build and found it really hard to align it later when the roof was much more heavy. I'm still having some trouble with the alignment today.
  23. Hey Kev. This is looking really really good and very familiar. Brings back some good memories and some of an aching back. ;-) And nice to see my build mentioned a few times I'll be following the rest of this build with interest.
  24. Yes, I'm still here but not very active. I replied here in response to an email notification as I subscribed to this thread back then. ;-) My obsy doesn't get used much for astronomy recently, mostly because of the neighbours' trees that have grown so much that I only have a small strip of sky left to see. The warm room does get used a lot as my man cave though. ;-)
  25. I have one of these "puddles" on my warm room roof too where the roof sagged a tiny bit and the water doesn't completely run off any more. I'm glad I used rubber sheet for the roof so I don't need to worry about the water there as it has no way in.
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