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.
Can EPDM be bonded directly over asphalt, tar, shingles, asphalt rolled roofing, or felt paper? No, the oils in petroleum based products will cause EPDM to swell and fail. EPDM should be bonded over 5/8â plywood, 5/8â OSB board, or polyisocyanurate board with a fiberglass backing.