Kasa a cikin gaba ( DPC ) mai tsatsanin mai suna kaiyayi da aka samun wani kawai daga rubutu wadannan kamar ke nuna kasar kaiyayi a matsayin yanzu mai shigar da masu gabatarwa.
Kasa a cikin polythene Damp Proof Course mai tsatsanin mai suna kaiyayi da aka samun wani kawai daga rubutu wadannan, amfani da wannan kamar ke nuna kasar kaiyayi a matsayin yanzu mai shigar da masu gabatarwa daga girma mai sauka mai gabatarwa daga masonariya ta ke samun masu gabatarwa daga cikin kaiyayi. DPC's suna aka yi amfani da sabon karamin kaiyayi daga zamanin hanyarwa, kamar wannan na faruwarwa ne ya ke amfani da wannan kaiyayin slate daga cikin construction. Slate bata still amfani da, amma wannan kaiyayin plastic na farko (ta fiye) ne ya ke samun amfani da kaiyayin wannan.