A trapezoidal roof profile has a ribbed trapezoidal-shape pattern across the panel. This means, it is a quadrilateral (or a four-sided shape – see Figure 1) that has just a single pair of parallel sides. Sometimes, trapezoidal roofs are mistakenly referred to as corrugated. This is a misnomer as the corrugated profile has a repeating wavy pattern across its surface.Trapezoidal rib roofs are popular with producers because the shape makes them very material-efficient (a high strength-to weight ratio). This makes for a very cost-effective profile. The shadows of the trapezoidal shapes offer clean lines whether installed vertically, diagonally, or horizontally. They also possess good structural characteristics and can carry design loads well (e.g. for snow and wind uplift). However, it is not considered as premium a profile as standing seam due to its attachment method.
PRONUNCIATION: \ ˈdȯr-mər
PART OF SPEECH: NOUN
SENTENCE: // A dormer is a structural projection from the main roof. It is usually gabled and typically has a window. The word dormer refers to the whole projection, not just the window.
When referring specifically to the window itself, it would be called a “dormer window”. It comes from the Latin word dormitorium, which means “sleeping room”.
But what about everything else that makes up a metal roof? From flashing, ridges, to valleys and eaves. Where are all these on a roof and what is their purpose? Read on as we deconstruct the rest of the metal roof.
Pop quiz. Should you install a metal roof or asphalt shingles? Asphalt shingle roofs are everywhere. But metal roofs have been in use for almost three thousand years. They have come a long way from the simple, yet functional corrugated or standing seam metal roof design usually associated with barns or sheds. So, which is the best choice for you? To answer this, let’s take a deeper look under the hood, or the roof, as it may be.
Tags: standing seam metal roof, exposed fastener, rail mounted, solar PV, solar technology, rooftop equipment, non-penetrating, manufacturing, maintenance, green, asphalt shingles, recycling, durability, environment
It’s time! IRE – the International Roofing Expo has started in Nashville, TN. It officially runs February 11-13 in Music City Center. The exhibit hall in the Center is located in downtown Nashville – incredible roofing products and within walking distance to restaurants and local music venues. What could be better?
Tags: Solar, Roof Clamps, pv modules, Snow Guards, sliding snow, metal roofs, snow retention, S5 clamps, metal roof clamps, solar mounting, Brackets, metal roofing, standing seam metal roof, snow stopper, snow bar, exposed fastener, roof panels, PV technology, direct mount, PV array, photovoltaic, rail mounted, rail less, solar PV, solar technology, rooftop mounting, rooftop equipment, maintain roof warranty, rooftop utilities, load tested, holding strength, aluminum, stainless steel
Non-penetrating rooftop mounting refers to the ability to mechanically attach a clamp to a standing seam roof by gripping the seam in such a way that there is no penetration to the panel material. The best method for standing seam clamp attachment is via round-point setscrews
Using cup-point setscrews is ill-advised as such a screw point cuts through the paint and protective coating of standing seam panels, causing corrosion and voiding warranties.
In the metal roofing construction industry, mounting ancillary items is often a convenient and necessary aspect of desired performance. Obviously, the best way to maintain the integrity of a metal roof is to allow it to function only as a roof. But various rooftop utilities such as, HVAC, piping, walkways, vents, satellite dishes, snow retention, solar arrays, signage, fall protection, lightning protection, etc. all serve critical purposes and must attach to the roof.
Tags: metal roofing, standing seam metal roof, cup point setscrews, corrosion, rooftop equipment, maintain roof warranty, round point setscrews, weather proofing, rooftop utilities, mechanical compression, non-corrosive, stainless steel
It is a sudden release of snow off a rooftop. Falling snow forms a temperature-sensitive bond to the surface of a metal roof. As that roof is warmed, (through sun or building heat loss), the bond with the snow is broken and a thin film of melt water lubricates the roof. This sudden release from a rooftop can dump many tons of snow below the eaves in a matter of seconds, endangering building elements, landscape, vehicles and pedestrians.
Qualifying Snow Retention Systems for Metal Roofing, from the Metal Construction Association discusses the rooftop avalanche in the following terms:
Metal roofs provide durable, long-term solutions and have been preferred by many for use in challenging northern and alpine climates where snow and its migration on and from the rooftop is a normal occurrence. Such climates can pose unique challenges for any roof. Pitched roofs of a material that has a slippery surface can pose sliding snow and ice hazards below eaves. In many instances, snow retention systems are installed on these roof types in order to reduce the risk of sudden rooftop avalanche and mitigate the hazards present in the discharge areas below the eaves.
Tags: Roof Clamps, Snow Guards, Snow stops, sliding snow, plastic snow guards, metal roofs, snow retention, S5 clamps, metal roof clamps, FAQ, Brackets, metal roof snow stops, metal roofing, metal roof clips, standing seam metal roof, snow rails, snow stopper, snow clips, snow fence, snow bar, exposed fastener, thermal movement, roof panels, rooftop avalanche
A metal roof is a metal roof, right? WRONG. Standing seam and exposed fastener roofs may both be metal and may even serve similar purposes, but the two styles are very different indeed.
This is a two-part series featuring the S-5! Snow Guard Calculator. Step 1 covers exactly why it is imperative to engineer your snow guard system and to utilize our online calculator to get the job done. Below, we'll walk you through exactly the calculator's purpose. Then in Step 2, we'll explain exactly how to logon and get started!
Your roof has been developing a perfectly rounded overhang of migrating snow right over your door. It glistens beautifully in the sun and seems to defy gravity as it gets bigger and bigger. But all you can think of is when it is going to fall. That is a smart premonition; because it will at some point. Snow avalanches can be unpredictable and catastrophic events. And the snow will fall wherever and whenever it wants to – on you, a loved one, your car or sidewalk.
Tags: Snow Guards, Snow stops, sliding snow, plastic snow guards, metal roofs, snow retention, metal roof clamps, metal roof snow stops, standing seam metal roof, snow rails, snow stopper, snow clips, snow fence, snow bar
This is Part Two of a two-part series on qualifying snow retention systems.
Recap of How Snow Retention Works
In Part 1 of What’s on Your Roof? we discussed how, unfortunately, there aren’t any snow guard police out there patrolling the industry. This creates a two-fold problem: One, that you can’t count on there being building inspectors to check a go-to-market system for structural adequacy; and two, architects and installers of these systems can potentially be sued for personal and property damage from faulty snow retention systems they specify or install.
But the light at the end of the tunnel comes in the form of the recently published Qualifying Snow Retention Systems by the MCA (Metal Construction Association). This technical guide bridges the gap between the free-for-all snow guard market and building owners, installers, and architects, who demand knowledge, strength, and a well-engineered system. So, what exactly constitutes a well-engineered system?
At S-5!, we don’t recommend installing adhesive-mounted snow guards on metal roofs. From both an economic and design perspective, glued on plastic snow guards typically have low holding strength and are unable to handle harsh weather-related elements. The bond weakens over time and when it fails, the guard can rip away paint and protective roof coatings, potentially leading to corrosion.