Building work and Party Wall Agreements?

On a property i am working on at the moment, some of what i thought was my roof space is my next door neighbors, i knocked a board off to find i was in looking into someones bedroom after checking the deeds he was in his right anyhow i just fire boarded it and sealed it with fire resistant foam and made good my neighbors side, the only partition in brick is the chimney breast,

 

Ok, two questions here:

1) you *are* a "professional", right?
2) you knocked on their door?

 

At some things

Only to tell them they had a hole in there wall that should have been sealed with fire board, i never checked to deeds 100% when i bought the house and wasn't a where they owned this roof space, its a house ive bought to sell on once ive renovated it.

 

Always expect the unexpected Zigs my friend....

 

Agreed.

Did some work for the National Trust rebuilding an "18th century" bridge.

Found Victorian engineering bricks in the foundations