Patent ID: 8291668

Claim:
A fluid delivery system for introducing a free-flowing active substance to a structure in situ, said system comprising: an integral, multi-layer device comprising a first layer and a second layer, said first layer having an inwardly facing surface and an outwardly facing surface, said first layer being a material that is permeable to said active substance but at least nearly impermeable to a structural construction material to be applied against said outwardly facing surface of said first layer; said second layer being water impermeable and having an inwardly facing first side and an outwardly facing second side, said inwardly facing first side of said second layer being affixed directly or indirectly to said inwardly facing surface of said first layer such that all or a substantial portion of said second layer is spaced apart from said first layer to create air space between said first and second layers, wherein said second layer has a plurality of protuberances extending toward and contacting said first layer, wherein each of said protuberances includes a plurality of openings to permit passage of said active substance therethrough; and a plurality of tubes adapted to be affixed to said device in communication with said air space to permit inflow of said active substance into said air space.