sniederb

Can't help the urge to set this straight ... I'm with you 100%. I'm not challenging any of the statements above. I have zero experience in fitting windows, so I don't have the eye for all the things that have been pointed out. So many things in our house have been "fitted by a muppet", and I feared these Velux would just be another example. Unfortunately they are. As for what next, again I'm completely with you, the right thing to do is re-fit them correctly. The only reason there's hesitation is that we've had quite a few very upsetting experiences with tradesmen here, but that's really a discussion for another day and another place. Please don't feel like I'm questioning or challenging your feedback. On the contrary, I'm very grateful for the education, and really appreciate you taking the time to answer questions.

What confounded me is that there's no bent or loose pieces, no missing screws, everything looking pretty much like it's supposed to be, and yet they leak. So I was hoping to learn if the installation overall is botched or not, and that has been clearly answered. What to do next is a completely different story, I'll have to think about that for a while. My preference would be to replace everything with fixed (=non-opening) skylights, but getting good tradesmen here is rather difficult. At least now I understand the situation, what to do next is a whole new discussion (not for here).

These are images I currently have, am happy to take more tomorrow if needed. Looking at the one from the side, maybe these are actually a "recessed installation"?

Thanks for your reply! I believe these windows would be "standard installation" (as opposed to "recessed installation") with an EKW flashing. Looking at the EKW installation guide, I can't make out how the flashing at the bottom is supposed to look like. When the window is closed, that groove isn't that bad (see image), but I'm sure water still accumulates there. If we have heavy rain, but it's coming down more or less straight, the windows are fine. The leaks are only on almost horizontal rain. I feel this flashing/tile groove would be an issue for all types of rain.

We have a roof with three Velux windows which leak under certain conditions. The windows face south, and whenever we have strong winds from the south-west with driving rain, the windows leak. I had a look today and can't tell if the windows have been installed properly or not (very few things in this house have been done properly in the past). "image_1.jpg" shows what the corners look like, to me that indicates water. "image_2.jpg" shows what the window looks like slightly open, and "image3_jpg" shows the front of the window almost closed. In "image_4.jpg" I've attempted a schematic of what I think is happening. The rubber seal (marked "A") rests in the bottom of a ledge, and that ledge is not sealed towards the outside. There are metal guards covering it, but with proper wind and rain there will be water ingress, which then fills up the ledge (the blue circle), and eventually leaks underneath the rubber seal. "image_3.jpg" shows how there's a gap between window and frame, and the rubber seal which will sit on the bottom of the ledge. Before I start the creative process of finding a way to seal this ... could someone tell me if these Velux are installed correctly? I can't see anything obviously bent or out of place, but find it hard to believe that this water ingress is by design. Thanks, Simon

Using https://skyciv.com/wind-load-calculator/ I get the attached chart. Bit lost with that, I confess. What does that mean for my shed?

George, thanks for the feedback. Currently there are brackets on all vertical joists (one each). The rafters are screwed on vertically and horizontally. Would you add more brackets / straps?

Thanks Dave, I'm definitely planning on doing that. I'm leaving the underneath space open for now because I want to keep all options open as to the "weighing down".

An update to this thread. I've put in 4 piers, each about 50cm deep and filled with concrete. 4x4s are the supporting beams, onto which our timber frame is built. The roof ridge is at about 2.5m. Now a local builder is telling me that those pier won't withstand the winter gales here (80mph wind is not uncommon, two years ago a gust was measured at 100mph). He recommends weighing down the frame with either large concrete blocks or gabions. I definitely won't disregard advice from a local builder, but the same time those concrete piers were the whole point of securing the shed. Any thoughts on this?

There is land lower than this, but it's far away, and digging a drain would mean exactly that heavy machinery (even a mini digger) which we want to avoid. But I do understand ... that's really the only option, isn't it

Our back garden has a patio right by the house, surrounded by grass which is raised above the patio by about half a meter. There's a path along the house, crossing the patio and then along the house again. The patio is at the lowest point of both path segments, and as such the default place where water pools. There's a pipe at one end of the patio, clearly for drainage, but that seemed clogged. Some lifting of flagstones revealed the layout of the drainage (French drain kind of thing), the far end was completely full of mud. However, looking at the area where the drain led to, it seems we have a combo of lowest point of the back garden + clay preventing water draining. One image shows the patio layout, the black drainage pipe can just be seen at the left, and then coming out again at the right where the black bucket is. The other image shows our involuntary pond, which holds water even after days without rain. So our situation is: water seeps to the lowest point of our back garden. That lowest point happens to be on clay, and holds water for days with hardly any drainage. Putting in a proper drainage leading away from the entire back garden would require heavy equipment, as everything around is at least 50cm higher (some areas more like 80cm). How can we get rid of that water? The only thing I can think of is a pump, but that seems a bit silly. I'm stumped.

Cool, that sounds pretty much exactly like what I have in mind.

Conor, I'm worried about the strong winds we get. So the "tethers sunk in to the ground" is why I'm thinking to pour concrete piers.

Yes, it's really just a wooden box with some chairs in it. Maybe a place for the tea kettle, if I get that to work with solar. I was thinking to pour 4 concrete piers with beam connectors on top, I fear timber stilts will rot too quickly. But from your reply I gather that those 4 concrete pier will easily do the job.

I'm planning to put up a bird hide in our back yard, Western Isles (Scotland). The structure itself will be timber, approx. 3m x 2m and 2m high, slanted roof (maybe with solar panels). The structure doesn't need insulation, but damp and rot is a concern (did I mention Western Isles?) The ground seems to be a mix of gravel and soil about 50cm deep, then solid rock. (The image shows roughly the intended size, using some spare clay liners to indicate the corners) I'm struggling to decide on the type of foundation. We're quite a bit away from the road, so the amount of concrete needed is fairly relevant. My understanding so far is that I could do pier & beam, which would mean to dig 4 holes, use some sort of sonotube and put in beam connectors. The alternative would be a monolithic slab, which would mean digging the entire area down about 20cm, add a frame on top and then fill it all with concrete. The pier & beam option is attractive because it needs so much less concrete, but what I read on this forum is that most people put down a slab. What are the things I need to consider to reach a decision?