Serving Salt Lake City, UT & Nearby Areas
(385) 438-3591
Serving Salt Lake City, UT & Nearby Areas
(385) 438-3591
Enough to hold your roof's actual snow load, calculated rather than estimated. The inputs are your ground snow load, the roof pitch, the panel profile. How far the snow travels to the eave. A real quote shows those numbers. A quote that just says snow guards is a guess.
Ask for the snow load figure and the layout calculation in writing before approving any snow retention quote.
Snow retention is an engineered system. So a supplier can size it properly from four measurable inputs.
Get your ground snow load from your city or county building department.
Snow retention sized by eye is not a lighter version of the right system for a Utah winter, it is a different product that happens to look similar from the driveway.
Mattie Tueller, Master Roofing
Four inputs, all measurable. The weight the system has to hold comes from your location's ground snow load, how steep the roof is, what the panel surface is. How far the snow slides before it reaches the eave. Change any one of those and the correct answer changes with it.
Because all four are knowable, this is a calculation rather than a judgment call. Manufacturers of engineered systems publish layout methods for exactly this reason. Any supplier working with those systems can run yours. Asking for it is a normal request rather than a hard one. The answer should arrive as numbers rather than reassurance.
Because snow does not only slide where you are worried about it. A system installed above the front door alone leaves the rest of the plane free to release. It concentrates load onto the section that was fitted rather than distributing it across the roof the way the design intends.
Retention is designed as a system across a roof plane, with the layout worked out so the holding force is spread. Treating it as a shield over one doorway misunderstands what the components do. It produces uneven loading on both the roof and the fasteners holding the system on.
Partial installation is its own failure mode, and it is a common one. What that failure actually looks like. Why it can tear part of a roof off, is covered in why snow retention tore part of a roof off. It is worth reading before agreeing to a partial layout.
Numbers. A properly prepared snow retention quote names the snow load it was designed for, the system and profile being used, how it attaches to your panels. The layout, meaning how many rows and where. If a quote contains none of that, nothing has been calculated yet.
None of this is an unreasonable request. A company using an engineered system already has these numbers. That's because they had to produce them to buy the right parts. If the numbers do not exist, the parts were chosen some other way.
It changes how the system holds, and on metal roofs it also decides whether the roof stays watertight. Systems that clamp to a standing seam grip the panel without penetrating it, while others fasten through the metal. That's every fastener is a hole in a weatherproof surface that has to be sealed correctly.
A clamped system relies on the seam and the panel being right for that clamp, so the profile matters. A fastened system relies on the person installing it. That introduces a workmanship variable that a clamp does not have.
Neither is automatically wrong, and both are used on good roofs. What you want is a company that can tell you which one they are proposing and why it suits your panel, rather than one that treats attachment as a detail beneath discussion. On a metal roof, every fastener decision is also a waterproofing decision.
Master Roofing engineers this rather than eyeballing it, and that is the whole difference in Utah. Snow retention has to be designed to the actual snow-load data for the address. That's because the system's job is to hold a calculated weight in place on a slick surface for months at a time.
I will be fair about why guessing is common. Snow guards look simple. They are small components, they bolt or clamp on. A crew that has installed them before can put them up without ever seeing a calculation. Nothing about the finished job looks different from a designed one, right up until the winter it matters.
Snow retention that was sized by eye is not a lighter version of the right system, it is a different product that happens to look similar from the driveway. So ask for the snow load figure and the layout on paper. It is a short conversation with a company that did the work. A very awkward one with a company that did not.
This article is general information about Utah roofs, not an assessment of yours. Every roof is different, and no article can tell you what is actually happening on your specific house. Have a licensed roofing contractor look at it in person before you act on anything here.
Your city or county building department publishes it, and they will tell you over the phone. It is the same figure used to engineer the structure of your house. So it is a matter of public record rather than something a contractor determines. Having that number before you collect quotes lets you check whether each company designed to the right load.
Sometimes, on a short roof plane with a modest snow load. That is exactly the kind of thing a layout calculation determines. What makes a single row appropriate is the math working out, not the roof looking small. Ask what load the layout was designed for. That's because the same single row can be correct on one house and badly undersized on another.
They benefit from being looked at, especially after a heavy winter or after any event where a large slab of snow loaded them. You are checking that nothing has shifted, that fasteners or clamps are still tight. That no panel damage has appeared around the attachments. It is a visual check during a routine roof assessment rather than a separate service.
A correctly specified and installed system should not. That's because it is designed to transfer load into the panel and structure in a way the assembly can carry. Damage comes from undersized systems, guessed layouts. Poor attachment, where the loads concentrate somewhere the roof was never meant to take them. The failure is in the design rather than the concept.
Planning it during the roof design is easier and usually cheaper. That's because the layout gets worked out alongside the panel order and everything arrives together. Retrofitting is entirely possible and gets done regularly on existing roofs. What matters far more than the timing is that the layout is actually calculated either way, rather than being added later as an afterthought.
We're here to see what's going on with your roof. A real assessment starts with your history and your attic, not a number from the driveway. You'll get a straight answer about what's up there, what it needs, and what it costs. Sometimes the honest answer is: your roof looks great.