Guys, I have a flat roof on part of my property (extension covering all of the back yard) – it measures around 17 foot by 16 foot, the room is on the ground level and is a Kitchen. At the moment I have a flat roof with felt and gravel on but I want to make the flat roof into a Mezzanine so it becomes my back yard. I have access to the flat roof through a window which I am planning to make into a patio door.
So what I want to know is if I was to change my flat roof to become a Mezzanine what options do I have. For example I have thought of these three options:
Option 1: I was thinking about a decking option which was to leave my flat roof as it is and get some treated joists and joist hangers to create the floor and then cover it with Deck boards – ensuring I have a pitch allowing the water to nicely run off the decking.
Option 2: To use steel/galvanised corrugated sheets under the treated joists as mentioned in option 1 above this will enable to create a double skin (two roof layers), sealing the corrugated sheets will enable the water to run off these sheets so very little water should go down to the next level which is the existing flat roof that has felt and gravel. I will have the decking boards on top as mentioned in Option 1.
Option 3: To remove the gravel from the existing flat roof and lay down around 3 to 4 inch of concrete using a mesh wire which will enable the concrete to hold together. The current joists are 10in high by 2 inch wide so technically they should be able to handle the weight of concrete around 3 to 4 inch thick. Once concrete has settled then secure the edges with lead and silicon to ensure no water sips through, then finally tile over the concrete.
I’m not sure which option is good and what are the pro and cons of each option as well as what other options are available to me. I’m really confused guys so would welcome any suggestions from you guys who are either in the trade or have seen or done something similar. Please help...so confused........
So what I want to know is if I was to change my flat roof to become a Mezzanine what options do I have. For example I have thought of these three options:
Option 1: I was thinking about a decking option which was to leave my flat roof as it is and get some treated joists and joist hangers to create the floor and then cover it with Deck boards – ensuring I have a pitch allowing the water to nicely run off the decking.
Option 2: To use steel/galvanised corrugated sheets under the treated joists as mentioned in option 1 above this will enable to create a double skin (two roof layers), sealing the corrugated sheets will enable the water to run off these sheets so very little water should go down to the next level which is the existing flat roof that has felt and gravel. I will have the decking boards on top as mentioned in Option 1.
Option 3: To remove the gravel from the existing flat roof and lay down around 3 to 4 inch of concrete using a mesh wire which will enable the concrete to hold together. The current joists are 10in high by 2 inch wide so technically they should be able to handle the weight of concrete around 3 to 4 inch thick. Once concrete has settled then secure the edges with lead and silicon to ensure no water sips through, then finally tile over the concrete.
I’m not sure which option is good and what are the pro and cons of each option as well as what other options are available to me. I’m really confused guys so would welcome any suggestions from you guys who are either in the trade or have seen or done something similar. Please help...so confused........
