Didn't use a lintel

Viksum wrote: »

My measurements were out. Ok, the overall length of the room with wall knocked out is 770cm. The gap where the wall was is 230cm and the 2 two walls at each side of the gap are 70cm each.

Forum folks have not seen your home and this point has been well covered in above posts. However, based on general building ethos you gap is not excessive - in terms of a lintel it is well within the realms of everyday openings and little different to a patio door opening. Also the 700mm each side gives a pier and sounds OK. Any risks or dodgy areas would also centered around the two 700mm piers. If the opening was knocked through and these piers weakened or cracked then there would be concerns. If the opening was carefully formed and the piers undamaged, or carefully and meticulously repaired then again OK. Plus one assumes these 700mm piers are tied back into, or bonded into, adjacent walls. Without seeing nobody can say.

None of us have a crystal ball so we do not know what happened some years back!

Viksum wrote: »

Thanks for your reply. My question was purely asking if it had needed a lintel would anything of moved, cracked or fell through after few years. I do wish I had a crystal ball! The two piers were undamaged and had been cut perfectly and both attach onto adjacent walls. Maybe I should stop worrying then. But if I do decide to go for a lintel, Which one is best, concrete or metal? I don't think I'll rest until we have one in - even if we don't need one!

That's a question for the structural engineer if you decide to employ one.

The revised measurements you've given are helpful. The original ones implied the width of the room was up to 7m (which is a long span for joists) that in turn implied the joists were most likely to span in the opposite (narrower) direction and would therefore have needed support by the wall which is no longer there.

As the revised dimensions suggest the rooms are more or less square in shape the joists could span in either direction, which means your husband could possibly be correct.

We can't really add much more to what has already been said. If you really don't believe it is safe then you need professional advice. Without having that advice, adding a lintel because you think you might need one could be a waste of money, and more importantly, the work involved in installing it might make the situation worse.