Question

To prevent the entry of termites through walls, the impenetrable physical ___________ may be provided continuously at plinth level.

(a) Chemicals barriers

(b) Structural barrier

(c) Physical barrier

(d) Water barrier

This question was posed to me in final exam.

The query is from Termite Proofing in chapter Damp Proofing, Water Proofing and Termite Proofing of Construction & Building Materials

Answer 1

Correct option is (b) Structural barrier

For explanation I would say: Structural barrier maybe in the form of a cement concrete layer or metal layer at plinth level. The cement concrete layer or coping is 50 mm to 75 mm thick and it is preferable to keep it projected about 50 mm to 75 mm internally and externally.