Vaclav

Hello, I am going to retrofit MVHR in 1930s semi and this also goes hand in hand with getting new windows. The question is: are windows with airtightness class 3 sufficiently airtight to allow MVHR work efficiently or do I need to get windows class 4? Any experiences?

No idea how would I be possible able to move them ? (are purlins those big horizontal beams, right?) The one closer to the camera is bended downwards and is slighly tilted to the side (visible on second pic) which to me looks almost scary, but then again it seems to be like this for ages.

Yes, everything around suggests it has not moved in ages, which is good. There is basically a rectangle of beams around roof connected to ridge beams at the end of the house and just sitting on wall in the middle of the house. There are also some planks(see picture) between ties and rafter but they don't seem to serve any purpose as they almost seem to be placed ad hoc and half of them is loose.

I was a bit too quick putting up a vapour membrane on the oposite side of the house, so I am hesitant to take it down now.. I have outrun myself here. Edit: Oh I might actually be able to keep it in place, just be carefull. Btw what size of bolts? Is it to drill through the rafter?

Thank you for the answer Russel. Do you think it is ok to keep the ties as they are and new ones some 15cm above them?

Hello everybody, I have been striping plaster in the 1st floor of my house and I have found out possible quite serious problem which I am not sure how to treat. The wall plate overlap connection is broken and the beam itself has been pushed few cm outwards. The beams ends aren't aligned. Whole thing seems to have happened in the past and seems stable at the moment but I want to make new ceilings hanging on rafter ties and I am worried about future stability of the roof. The idea I came up so far is to add some new rafter ties sitting slighly higher than the current ones to prevent roof from spreading further and add some heavy duty L-bend steel straps fixed to the wall and the beam. Still not sure how to reconnect two beams. Do you thinks this is feasible or have any other ideas? Should I get structural engineer to look at it? Thank you very much for any inputs Vaclav