Sorting Arrays. PHP has several functions that deal with sorting arrays, and this document exists to help sort it all out. The main differences are: Some sort based on the array keys, whereas others by the values: $array['key'] = 'value';
Can I install Roof-TopÂ® EPDM membrane directly over an existing roof? You can install Roof-TopÂ® EPDM membrane over an existing roof only if a new layer of 5/8â plywood, 5/8â OSB board, or polyisocyanurate board with a fiberglass backing is used as a barrier to protect the EPDM.
One advantage of an EPDM roof is that the average sheet size can be quite large. Whereas the standard TPO system comes in rolls of 5, 8, 10, or 12 feet wide (by 50 or 100 feet long), an EPDM sheet can easily be ordered in a 50 foot by 50 foot section. This allows for fewer seams than its TPO counterpart.