Exposed Fastener Metal Roof

Exposed Fastener Metal Roof

Concealed Fastener Systems More Expensive but Proven to Last in Standing Seam Metal Roofing Systems Over the past several months we’ve talked a lot about standing seam panels and their ability to resist all kinds of weather-related challenges as well as fire, hurricanes and salt air. We’ve compared Galvalume to galvanized steel, polyester to PVDF coating and different metal and aluminum gauge thicknesses. But the one thing we haven’t talked about are the two different types of metal roofing fastening systems—a very important topic that involves economics, aesthetics and maintenance. The two most common ways of attaching a metal roof to a structure are exposed fasteners and concealed fasteners. Exposed fastened panels use a screw or nail to secure the metal roofing to the roof deck or purlins whereby the nail or screw actually penetrates an area where two panels overlap.  This can involve hundreds and even thousands of fasteners which must be spaced and driven to maintain the integrity of rubber grommets which serve to prevent precipitation from gaining access through each hole. Conversely, concealed clip fastened panels use a system where the fasteners are driven through the clips into the roof deck with no connection or piercing of the metal panels. The clip and fasteners are concealed beneath the standing seam panel material. The panel is then laid over and attached to the clips and then mechanically or hand locked to them. Granted, exposed fastener metal roofing panels are a less expensive alternative to concealed fastener standing seam roofs. They work best in simple roofs like gables or shed roofs but get difficult to work with on structures with dormers, valleys and complex architectural features.While many people swear by them and have enjoyed years of service from them, exposed fastener roofs have lesser warranty times than concealed fastener systems. Problems can occur if the fasteners are driven too tight by the contractor or installer. Because metal expands and contracts with temperature change, screws driven too tight leave no room for expansion and contraction. In contrast, a concealed fastener system is driven through the clip and not the panel itself and is designed to flex or move under the panel. And of course, the concealed fasteners are never exposed to the weather and are insulated from the movement. Cost will differ depending on location, but concealed fastener is more expensive because of the clips and the time it takes to install the hidden fasteners.  Their biggest benefits are peace of mind and aesthetics.  Instead of hundreds or thousands of tiny holes filled with screws with an oversized cap head, you have an aesthetically smooth surface broken only by the seams which give the concealed fastener system its elegance. Because of this aesthetic, concealed systems are seen largely on residential and commercial structures while the exposed fastener system is more likely to be found on large industrial and commercial buildings. Some building owners will tell you their exposed fastener systems have stood up to precipitation and UV light from the Sun for years. But unlike concealed fastener systems, the warranties are shorter and less robust and some experts suggest that screws be randomly backed out periodically to see if the grommets are intact and still snug in the drill holes and the wood substrate is free of any dampness. This entry was posted in Architects, Building & Homeowners, Contractors, Metal Roofing, Standing Seam Metal Roof Panels and tagged Englert, Metal Roofs, Standing Seam Metal Roof on January 29, 2014 by Mitch Gaber. Post navigation ← There’s No Place Like Home for a Standing Seam Metal Roof Steel and Aluminum—Two Great Metal Roofing Materials, Each Have Their “Strengths” → Search for: Archives March 2017 January 2017 December 2016 October 2016 September 2016 August 2016 July 2016 June 2016 May 2016 April 2016 March 2016 February 2016 January 2016 December 2015 November 2015 October 2015 September 2015 August 2015 July 2015 June 2015 May 2015 April 2015 March 2015 February 2015 January 2015 December 2014 November 2014 October 2014 September 2014 August 2014 July 2014 June 2014 May 2014 April 2014 March 2014 February 2014 January 2014 December 2013 November 2013 October 2013 September 2013 August 2013 July 2013 June 2013 May 2013 April 2013 March 2013 February 2013 January 2013 December 2012 November 2012 October 2012 September 2012 August 2012 July 2012 June 2012 Categories Aluminum Composite Panels Architects Building & Homeowners Contractors Custom Coating for Coil Gutter Machine Gutters Hurricane Wind Uplift Ice Dams Metal Roofing Metal Roofing Coil Metal Roofing Colors Metal Roofing Machine Photovoltaic Prepainted Metal Coils RainPro Rainwater Harvesting Residential Metal Roofing Roll Forming Machines Roofing Coil Solar PV Solar Thermal Technology Standing Seam Metal Roof Panels Tolling Wall Panels
exposed fastener metal roof 1

Exposed Fastener Metal Roof

Concealed Fastener Systems More Expensive but Proven to Last in Standing Seam Metal Roofing Systems Over the past several months we’ve talked a lot about standing seam panels and their ability to resist all kinds of weather-related challenges as well as fire, hurricanes and salt air. We’ve compared Galvalume to galvanized steel, polyester to PVDF coating and different metal and aluminum gauge thicknesses. But the one thing we haven’t talked about are the two different types of metal roofing fastening systems—a very important topic that involves economics, aesthetics and maintenance. The two most common ways of attaching a metal roof to a structure are exposed fasteners and concealed fasteners. Exposed fastened panels use a screw or nail to secure the metal roofing to the roof deck or purlins whereby the nail or screw actually penetrates an area where two panels overlap.  This can involve hundreds and even thousands of fasteners which must be spaced and driven to maintain the integrity of rubber grommets which serve to prevent precipitation from gaining access through each hole. Conversely, concealed clip fastened panels use a system where the fasteners are driven through the clips into the roof deck with no connection or piercing of the metal panels. The clip and fasteners are concealed beneath the standing seam panel material. The panel is then laid over and attached to the clips and then mechanically or hand locked to them. Granted, exposed fastener metal roofing panels are a less expensive alternative to concealed fastener standing seam roofs. They work best in simple roofs like gables or shed roofs but get difficult to work with on structures with dormers, valleys and complex architectural features.While many people swear by them and have enjoyed years of service from them, exposed fastener roofs have lesser warranty times than concealed fastener systems. Problems can occur if the fasteners are driven too tight by the contractor or installer. Because metal expands and contracts with temperature change, screws driven too tight leave no room for expansion and contraction. In contrast, a concealed fastener system is driven through the clip and not the panel itself and is designed to flex or move under the panel. And of course, the concealed fasteners are never exposed to the weather and are insulated from the movement. Cost will differ depending on location, but concealed fastener is more expensive because of the clips and the time it takes to install the hidden fasteners.  Their biggest benefits are peace of mind and aesthetics.  Instead of hundreds or thousands of tiny holes filled with screws with an oversized cap head, you have an aesthetically smooth surface broken only by the seams which give the concealed fastener system its elegance. Because of this aesthetic, concealed systems are seen largely on residential and commercial structures while the exposed fastener system is more likely to be found on large industrial and commercial buildings. Some building owners will tell you their exposed fastener systems have stood up to precipitation and UV light from the Sun for years. But unlike concealed fastener systems, the warranties are shorter and less robust and some experts suggest that screws be randomly backed out periodically to see if the grommets are intact and still snug in the drill holes and the wood substrate is free of any dampness. This entry was posted in Architects, Building & Homeowners, Contractors, Metal Roofing, Standing Seam Metal Roof Panels and tagged Englert, Metal Roofs, Standing Seam Metal Roof on January 29, 2014 by Mitch Gaber. Post navigation ← There’s No Place Like Home for a Standing Seam Metal Roof Steel and Aluminum—Two Great Metal Roofing Materials, Each Have Their “Strengths” →
exposed fastener metal roof 2

Exposed Fastener Metal Roof

Over the past several months we’ve talked a lot about standing seam panels and their ability to resist all kinds of weather-related challenges as well as fire, hurricanes and salt air. We’ve compared Galvalume to galvanized steel, polyester to PVDF coating and different metal and aluminum gauge thicknesses. But the one thing we haven’t talked about are the two different types of metal roofing fastening systems—a very important topic that involves economics, aesthetics and maintenance. The two most common ways of attaching a metal roof to a structure are exposed fasteners and concealed fasteners. Exposed fastened panels use a screw or nail to secure the metal roofing to the roof deck or purlins whereby the nail or screw actually penetrates an area where two panels overlap.  This can involve hundreds and even thousands of fasteners which must be spaced and driven to maintain the integrity of rubber grommets which serve to prevent precipitation from gaining access through each hole. Conversely, concealed clip fastened panels use a system where the fasteners are driven through the clips into the roof deck with no connection or piercing of the metal panels. The clip and fasteners are concealed beneath the standing seam panel material. The panel is then laid over and attached to the clips and then mechanically or hand locked to them. Granted, exposed fastener metal roofing panels are a less expensive alternative to concealed fastener standing seam roofs. They work best in simple roofs like gables or shed roofs but get difficult to work with on structures with dormers, valleys and complex architectural features.While many people swear by them and have enjoyed years of service from them, exposed fastener roofs have lesser warranty times than concealed fastener systems. Problems can occur if the fasteners are driven too tight by the contractor or installer. Because metal expands and contracts with temperature change, screws driven too tight leave no room for expansion and contraction. In contrast, a concealed fastener system is driven through the clip and not the panel itself and is designed to flex or move under the panel. And of course, the concealed fasteners are never exposed to the weather and are insulated from the movement. Cost will differ depending on location, but concealed fastener is more expensive because of the clips and the time it takes to install the hidden fasteners.  Their biggest benefits are peace of mind and aesthetics.  Instead of hundreds or thousands of tiny holes filled with screws with an oversized cap head, you have an aesthetically smooth surface broken only by the seams which give the concealed fastener system its elegance. Because of this aesthetic, concealed systems are seen largely on residential and commercial structures while the exposed fastener system is more likely to be found on large industrial and commercial buildings. Some building owners will tell you their exposed fastener systems have stood up to precipitation and UV light from the Sun for years. But unlike concealed fastener systems, the warranties are shorter and less robust and some experts suggest that screws be randomly backed out periodically to see if the grommets are intact and still snug in the drill holes and the wood substrate is free of any dampness.

Exposed Fastener Metal Roof

Exposed Fastener Metal Roof
Exposed Fastener Metal Roof
Exposed Fastener Metal Roof
Exposed Fastener Metal Roof