Dodgy-diver Posted December 17, 2020 Share Posted December 17, 2020 im building a timber framed house extension but as I'm only 350mm from boundry I need 1 wall to have a 30min fire rating I'm using Hardie plank to clad the wall with but the building inspector says I need additional fire protection can anyone tell me the cheapest way out of this please as usual its all costing more than I had guessed so running low on pennies many thanks for any ideas Link to comment Share on other sites More sharing options...
wozza Posted December 17, 2020 Share Posted December 17, 2020 Can you use a fire retardant membrane? Link to comment Share on other sites More sharing options...
TonyT Posted December 17, 2020 Share Posted December 17, 2020 https://www.magply.co.uk/ Link to comment Share on other sites More sharing options...
PeterW Posted December 17, 2020 Share Posted December 17, 2020 What is the full wall build up, and where does he want the protection added ..?? Quickest way is replace any outer OSB layer with cement board, and then the battens become the only issue but they tend to accept this. Link to comment Share on other sites More sharing options...
nod Posted December 17, 2020 Share Posted December 17, 2020 This is quite common when your within a 1000 of a boundary Your Architecht should have picked this up You will have to double up on your cement board Two layers of 12.5 Staggering Horizontal and vertical joints Or add a fire curtain Which will cost more Link to comment Share on other sites More sharing options...
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