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About Visti

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  1. Get the one man boards if you're only 2. I wouldn't want to try doing to full size unless you've got a decent crew. Experience helps, as does the right tools, particularly blades for the saws. We've still got a few small unboarded areas we'll be doing in the next few weeks. You're welcome to come along and experience it once Corvid restrictions relax. Encon are a great supplier when it comes to price. I love it once it is on, but goodness it is difficult compared to standard board. And the skimming isn't as DIY friendly as it's appear as there is little room for error. Oh the dust!
  2. Screwing is hard work. Burnt through two impact drivers on about 300m2 and then got contractors in to finish the job Are you planning on DIYing it?
  3. I find the box cutouts to be a piece of cake with the right tools. 10mm steel drill bit for the corners and a jigsaw with the right bit does the job well. The issue is it eats impact drivers and wrists. Technique is critical to get a good quality install. Also, need at least two people to make the job viable, even with one-man boards. It is a viable product, but not certain it is worth it for the extra cost and effort.
  4. Good idea for standing seam roofs like these, though the fact the windows don't line up with the seams make me twitch a bit!
  5. Wonder if this includes charcoal... What will I do with my Webber!
  6. Plywood it is. Just ordered 18mm for 400mm joist centers. Thanks for the idea
  7. It is dry yup, watertight as of October
  8. That is not a bad shout at all. I think I'll go with that. Mind some clarifications? - what grade and thickness of plywood did you use? - How'd you fix it to the beams? They did yes, but I'm not convinced on that as a finished floor, and I really don't want to have to double up. Plus they are not the most cost effective solution!
  9. We're putting in a mezzanine with 6x2' beams (planed square edged) and looking to do the flooring as easily as possible. Any suggestions where I only have to install one later of board for a decent combined structural and finish floor? Or is T&G chipboard the most cost effective way to go, but with what on top?
  10. You can see what we did to strengthen existing joists, though additional static load bearing capacity isn't the same as deflection under dynamic loads such as walking: ,
  11. 253mm is standard height for pozi joists, and the majority are 600mm centres. Also, joists longer than 4m are possible, as you can see in some of the early SE calcs for our frame. Comes at the cost of a lot of deflection though as bending moments get worse the longer the beam. We had those PZ2 joists rotated 90 degrees to shorten them down to 3.6m for more robustness.
  12. If it is a simply supported beam (at each end) and uniformally loaded (weight distributed evenly across it's length), then yes the centre will be the point of max deflection. If it is a cantilever, it'll be the unsupported end that'll experience the most. If you have stud walls or a large weight focused at one point, then the max deflection will depend on the result of all the bending moments.
  13. Good news is that there is a very cheap resoution after all! And far less technically challenging. Rather than ~£1.5k on flitch beams, Nicks idea of reinforcing the joists beneath the partitioning wall is a green light. It requires some specialist material rather than plywood, but a 45mm thick Kerto S beam affixed with ESCR screws to each joists will reinforce them enough according to our engineer. Only about £200 after delivery fees.
  14. @Nickfromwales suggested the same as you @ProDave in turning the partitioning wall into a beam effectively with the use of OSB and glue/nails. He also suggested reinforcing the sides of the existing posi joists the same way so that they can better support the partitioning wall. I will be going back to the SE today to see how much improvement that would be! Not a bad idea either! That'll avoid the need to worry about the partitioning stud wall and the joists beneath all together Possibly, but not getting a straight answer from them at this time! Yup, afraid one loses an order of magnitude more than one might expect 39kg/m2 isn't much at all to play with when domestic regs require ~60kg dead load plus the 150kg improsed.
  15. Problem isn't the partitioning wall, but the joists below. They were supposed to engineer in tolerance to support a wall holding up the mezzanines, but failed to do so. That means the joists supporting the partitioning wall can only support 0.55kN/m. That equates to 0.39kN/m2... not very much I am going to see if I can add in suspension cables from the ridge beam to take some of the rest of the load...