What have done towards your prep?

[Pete Grey]

I doubt you will need a cavity tray just for that Pete I’m sure your builder friend will advise you if you needed one …..but if you ever close it all in with sides ( you will need to fit a cavity tray across the whole width of the roof and a foot either side .

Thanks SS, the porch will be left open sided, it is just intended for a little extra shelter in bad weather. Previous we have occasionally used a gazebo, but this will save us messing about it being a permanent structure.