11. CHECKLIST FOR HDPE MEMBRANE WATERPROOFING

 

11. CHECKLIST FOR HDPE MEMBRANE WATERPROOFING
Name Of Project :
Date of Checking:
Location / Structure:
Drawing / Document Reference No.
Sl. No.	Description / Activities / Items to be Checked	Status
1	Check for the safety process is followed for waterproofing activities.	OK	Not OK
2	Check for approval of work methodology of waterproofing	OK	Not OK
3	Check for approval of Waterproofing system and materials which to be used.	OK	Not OK
PRIOR TO INSTALLATION OF PU MEMBRANE
1	Check for the availability of approval materials	OK	Not OK
2	Check if surface preparation is done as per WMS. like  dust free dry surface, repairing of surface cracks, removal of oil and other loose material, etc.	OK	Not OK
3	Check for provision of Pressure Release Pipes (PRP).	OK	Not OK
4	Check for dia. & length of Pressure Release Pipes (PRP)	OK	Not OK
5	Check aggregate or gravel provided inside PRP hole.	OK	Not OK
6	Check the mouth at the top of PRPs is covered with tough plastic to avoid entry of loose materials inside the PRP.	OK	Not OK
DURING INSTALLATION OF HDPE MEMBRANE
1	Check sandy surface layer side is up facing towards the concrete/Raft pour.	OK	Not OK
2	Check for end lapping and positioning is as per manufacturer's guideline.	OK	Not OK
3	Check continuous bond of membrane without creases.	OK	Not OK
4	Check roller is applied on joints of membrane as per manufacturer's guideline	OK	Not OK
5	Check proper jointing at junction of PRP & Membrane	OK	Not OK
AFTER INSTALLATION OF HDPE MEMBRANE
1	Check no damage during steel fixing and concreting	OK	Not OK
2	Check removal of protection tape before concrete pouring (if protection based HDPE membrane is used)	OK	Not OK
3	Check for the termination of membrane is done as per methodology.	OK	Not OK
Remarks: