I'm building a single storey extension. It's 6.4m wide and will have a 4.8m bifold door.
One SE, that I have paid for, says I need windposts as the opening is over 2/3 of the wall length.
Another SE (that I haven't payed for his services yet) says I do not need windposts as I 3 bricks (700mm) either side of the opening.
It's a bit late to put windposts in now as I've built up to damp.
Can I convince the original SE that I don't need the wind posts? Or should I just pay the second SE to provide calcs showing I don't need them?
Your thoughts please.[/b]
One SE, that I have paid for, says I need windposts as the opening is over 2/3 of the wall length.
Another SE (that I haven't payed for his services yet) says I do not need windposts as I 3 bricks (700mm) either side of the opening.
It's a bit late to put windposts in now as I've built up to damp.
Can I convince the original SE that I don't need the wind posts? Or should I just pay the second SE to provide calcs showing I don't need them?
Your thoughts please.[/b]