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.
1 Having an EPDM rubber roof professionally installed runs around $2.50-$4.50 a square foot or $2,250-$4,000 for a 30x30-foot flat roof on a single family home, depending on thickness, color, local labor rates and whether the old roof has to be removed.