xpansion and contraction under the influence of variations of temperature . Mo air is admitted except such as is provided for by special ventilating arrangements in the construction of the roof , which is the only true way to obtain proper ventilation . Circular roofs can be most suc cessfully… … condensed moisture , which ultimately falls outside the roof at the eaves , while the supporting bars bein fixed in the direction of the inclination of the roof , there is no impediment whatever to the free flowof water off the roof , as there are no outside horizontal connections required . Any…
