Question

Which is not the nominal thickness of D.P.C?

(a) 2cm

(b) 2.5cm

(c) 4cm

(d) 2.5″

This question was posed to me during an interview for a job.

Enquiry is from Measurement and Calculation of Quantities in division Methods of Building Estimate & Estimate of Building of Civil Engineering Drawing

Answer 1

Right choice is (d) 2.5″

Best explanation: Damp proofing is accomplished several ways including:

• A damp-proof course (DPC) is a barrier through the structure designed to prevent moisture rising by capillary action such as through a phenomenon known as rising damp. Rising damp is the effect of water rising from the ground into property. The damp proof course may be horizontal or vertical. A DPC layer is usually laid below all masonry walls, regardless if the wall is a load bearing wall or a partition wall.

• Integral damp proofing in concrete involves adding materials to the concrete mix to make the concrete itself impermeable.

• Surface coating with thin water proof materials for resistance to non-pressurized moisture such as rain water or a coating of cement sprayed on such as shotcrete which can resist water under pressure.

• Cavity wall construction, such as rainscreen construction, is where the interior walls are separated from the exterior walls by a cavity.

• Pressure grouting cracks and joints in masonry material.