ensure maintenance is carried out by a competent person (someone who has the necessary skills, knowledge and experience to carry out the work safely) 1  maintain plant and equipment regularly â use the manufacturerâs maintenance instructions as a guide, particularly if there are safety-critical features.
HDPE (High Density Polyethylene). 3/4 HDPE will cost about $45.00 for 100' ($0.45/ft), so depending on the amount required can be much cheaper than the previous options. HDPE is used by many municipalities as water supply lines, so it has been tried and tested in underground applications.
The average HDB renovation cost in Singapore is estimated to be between $14000 and $16,000. This is in fact just for a 3 bedroom house. On the other hand, the full HDB renovation cost for a 4-bedroom house is in the range of $16,000 to $20,000.1).Size. As you can see from above, the size of the house is the first thing that affects the HDB renovation cost.or a 4-bedroom flat, the cost of renovation can be in the region of $11,000 t0 $15,000. This is noticeably cheaper if you have to compare it against the price of renovating an old house. Therefore, if you live in an older house, know that it will require more materials and more labor, hence it will cost more.