Cavity v. Solid Walls

ANOTHER question to be considered is the problem of cavity or solid walls. In the former, 4-inch facing bricks are used for the exterior of the house, a 2-inch cavity is left, bound at intervals by pieces of metal to -l-l-inch J?letton bricks on the inside, the whole forming what is generally known as an 11-inch wall.

There are two more or less generally accepted reasons for using a facing brick. One is that many people prefer a house to be what is called brick built, and the other is that many architects are of the opinion that a cavity tends to make a warmer and drier building.

With the latter connection the writer does not agree, for while he has built three houses for himself, he still prefers the 9-inch solid wall covered with stucco, always providing – and this is the important point – that this outside rendering of cement and sand is made waterproof by the inclusion of a waterproofing powder.

Virtues of the Solid Wall

His reasons for choosing a solid wall are these: one gets a satisfactory bonding of the bricks with added strength, the weight of the first floor joists is adequately distributed over the whole thickness of the wall, and lastly, it seems more satisfactory, particularly during the winter, to have 9 inches of dry wall than a -±£-inch partially damp wall, a 2-inch cavity which must of necessity be filled with damp-laden air, and a 4J-inch exterior wall that, according to the nature of the bricks, varies in its degree of water absorption, but is, for some months ab any rate, greatly moisture-laden.

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