Irish Builders Polythene Film is a Damp Proof Membrane for use below solid concrete floors in compliance with the relevant Building Control regulations. Manufactured from low density polyethylene (LDPE), it is available in 3 thicknesses from 250micron to 500micron. (1000gauge to 2000gauge). These DPMs are hardwearing, can withstand rough site handling and have a high puncture resistance. BBA and PIFA Approved.