Hi All,
I'm going to be laying paving slabs on a support system (ie Caro / Wallbarn) on top of a flat roof.
The roof is strong enough to support the weight (steel beams and concrete slabs). The existing flat roof is made up of 50mm hard foam insulation and 2 layers of EPDM.
We intend to lay ontop of the EPDM but want to ply it out first to spread the load. Given that the roof is already watertight with the EPDM, can we put a more cost effective membrane over the ply to protect it from wood rot etc? It's a fairly large area 121m2 so an EPDM skin is going to be quite costly when all we're trying to achieve is protecting the ply.
Any thoughts appreciated!
I'm going to be laying paving slabs on a support system (ie Caro / Wallbarn) on top of a flat roof.
The roof is strong enough to support the weight (steel beams and concrete slabs). The existing flat roof is made up of 50mm hard foam insulation and 2 layers of EPDM.
We intend to lay ontop of the EPDM but want to ply it out first to spread the load. Given that the roof is already watertight with the EPDM, can we put a more cost effective membrane over the ply to protect it from wood rot etc? It's a fairly large area 121m2 so an EPDM skin is going to be quite costly when all we're trying to achieve is protecting the ply.
Any thoughts appreciated!