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Wideslab flooring - Airtightness

Moggaman · 2021-05-16 08:52:15

Hi. I have read a few threads on the wrapping of the precast slab. A lot of the time it refers to hollowcore.. I will be using wideslab slabs and as a self builder , I am looking for input on the detail. I believe the wide slab don’t have the same air issues as HC... generally I have been told that builders in my area bed…

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16-05-2021 9:52am

#1

Moggaman

Registered Users Posts: 348 ✭✭

Join Date: February 2010

Posts: 219

Hi. I have read a few threads on the wrapping of the precast slab. A lot of the time it refers to hollowcore.. I will be using wideslab slabs and as a self builder , I am looking for input on the detail.
I believe the wide slab don’t have the same air issues as HC... generally I have been told that builders in my area bed the slab in mortar and don’t use membrane. For me it seems, bedding the slabs, then taping the underside of slab to external wall and airtight painting the extent of the wall down to just below the suspended ceiling might be the plan?. Upstairs , probably tape joint as well although I will be pouring a screed .
I presume u cannot bed and use membrane at the same time, logistically it would not work with the slabs on-site?
Thanks

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