Lintel in external wall into conservatory

2 Jan 2014
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South Tyneside
United Kingdom
We're wanting the wall and doors knocking out that lead into the conservatory, the wall is cavity external wall, how should someone go about this, as in what steels or lintel is to be used, the opening will be about 2.4m wide, should they be using steels or catnic type lintel, will calculations need to be done. How is it generally done
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Calculations needed and building regs sign off, you still need an external grade door installed between conservatory and house to maintain thermal separation.

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