<\/a>Photo 3. The membrane has been correctly cut in a cloverleaf pattern. Photos: Hutchinson Design Group Ltd.<\/p><\/div>\n
Now that our cover board is installed, we have the membrane and its transition into the roof drain. Water cut-off mastic is to be installed on the extension ring flange. How much you ask? One tube. Load that flange up. Make two thick beads with it. I have never heard a contractor say, \u201cMan, using all of that water cut-off mastic on the job really set me back.\u201d It\u2019s a small item, but it is worth it.<\/p>\n
After the membrane has been installed and the clamping ring is set, it\u2019s time to cut a hole in the membrane to allow the water to get to the drain and off the roof. How big should the hole be? As small as possible is what some contractors might say. I ask a question to you now: what is the goal of the roof drain? If you answered to get the water off the roof as quickly as possible, you would be correct. Then why would the contractor want to cut a small hole in the roof membrane that would restrict the flow of water into the roof drain piping and off of the roof? I am dumbfounded as well. When we detail the roof drain, we call for the membrane to be cut back to within a 1\/2 inch of the extension ring in a cloverleaf pattern around the clamping ring bolts. (See Photo 3.) This way there is no confusion on how far back the membrane is to be cut. Set the drain dome and the roof drain detail is complete.<\/p>\n
So, there you have it. Now the roof can drain properly with a brand-new roof drain with no problem (fingers crossed).<\/p>\n","protected":false},"excerpt":{"rendered":"
What is the number one goal of any building owner when it comes to the roof? They don\u2019t want water pouring through their ceilings damaging…<\/p>\n","protected":false},"author":160,"featured_media":10533,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"Replacing a Roof Drain on a Structurally Sloped Steel Roof Deck","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[26,27],"tags":[5116,7552,169,3214,856,8242,8243],"jetpack_publicize_connections":[],"yoast_head":"\n
Replacing a Roof Drain on a Structurally Sloped Steel Roof Deck - Roofing<\/title>\n \n \n \n \n \n \n \n \n \n \n \n \n \n\t \n\t \n\t \n \n \n \n \n \n\t \n\t \n\t \n