Provision for Ventilation. 



4i 



tight. But against these have to be placed the fact, that 

 from its being so thin, and also being a rapid conductor of 

 heat and cold, it is very hot in summer and very cold in 

 winter, and unless lined out with boarding the house is 

 subject to these unfavourable conditions. If it is boarded, 

 however, this is counteracted, and then it makes a capital 

 roof — one that will last many years if given a coat of paint 

 every twelve months. When wood is used as a roof, it should 

 be firm and well put together, and be covered with felting, 



Fig. 1. — Ventilating roof. 



which needs to be well tarred and sanded once a year, thus 

 making a warm and substantial cover. It is important to 

 have a good slope in a roof of this kind, so that the water 

 may run off rapidly ; and when this is done, a wooden roof 

 is as good as anything else. 



The question of ventilation is a most .important one, and 

 worthy of more consideration than is usually given to it. 

 The way often adopted is to make a few holes in one end 

 of the house, and let the air get in and out the best 



