During the 1960's and 1970's, electrically heated ceilings, or “radiant” heated ceilings, were commonly installed in new homes.  This was due in part to the low cost of electricity at the time, as well as other benefits.  A few benefits to radiant heat are :

 

    

    Despite the benefits, these systems are rarely installed now due to the higher cost of electricity, and the general inefficiency of the system compared to other means of heating.

    

    To install the system, gypsum lath was attached to the ceiling joists using nails, which were more commonly used in those days than screws.  

 

    After this lath was hung, the electricians would install the radiant heat wire to the lath with staples.  This was run in one continuous wire, looping back and forth, with the wire being more concentrated against outside walls (See diagram at left).  

    Next, the base coat of plaster was applied with a thickness of 5/8”.  This had to be sand based plaster, instead of the plaster commonly used, which is unsuitable for heated applications due to it's insulating properties.  

    Finally, the ceiling was finished with white finish plaster.  

 

 

    

    Throughout the use of this system, the installation of the underlying gypsum was almost always done with nails, instead of screws used in modern construction.

    Although securing and stabilization of electric heated ceilings must be approached differently than regular plaster ceilings, it is still quite possible.  When done correctly, this leaves the electric heat fully functional, and the ceilings will be stabilized with no chance of sagging or falling.  We at Harne Plastering Company have repaired many electric heat ceilings, and have developed a way of doing it that assures a sound, safe, functionally heated ceiling with no need for demolition or replacement.