ive changed for JA City Guide template, i think its a T3 framework.
ive read the JA Builder documentation its says ive to add
.com_jabuilder .t3-mainbody {
width: 100%;
padding-top: 0;
padding-bottom: 0;
}
.com_jabuilder .t3-content {
padding: 0;
}
but it seems not work to 100% de JA builder