The second way to install a metal roof over a shingle roof is with the use of purlins or battens. They gave me a good quote with quality products, and we signed off after a final inspection. Make sure the roof deck is dry of any dew before beginning work in the morning. This includes the shingles and roofing felt. Fortunately, such problems are rare with metal roofs.
I find it helpful to put a stop if working alone on the eve or a string line across the bottom eve If you are lucky enough for a helper to keep the bottom edge straight. Just predrill the sheets at the mid-point of the 2X4 width. If your roof is leaking or if you suspect that it might in the near future , it may be worthwhile to go with the metal roof solution. Industry studies show that metal roofs reflect solar radiant heat, which can reduce cooling costs by 10 to 25 percent. Use furring strips to build a slat board on the roof, then mount the steel sheets to the slat board. You need to add furring strips over the top of the shingles so you have something to attach the metal panels to.
I think that would be a nightmare to make everything work out. Our roof was replaced last week. Others say just the opposite, that putting metal panels over sheathing or sheathing with felt will enhance and trap condensation and accelerate corrosion of the under side of the metal; and that you should put down 1x4 purlins with drain holes cut into the bottom of the purlins to allow trapped water to run down the roof , then the metal over the purlins. Figuring out what is right for your current situation is the key, and a good Denver commercial roofing company will be there to help you decide. The top only has to have a bare minimun as you will be doubling in that area when you attach the cap.
In terms of aesthetics, you need to be careful in terms of choosing your metal roof solution so that it will blend into your surrounding neighborhood. Be sure to take advantage of the , and learn about. The same is true of flashing, drip edge, tar buckets, vents, and other scrap metal. So when we talk about metal roofing over shingles, how does it work? Asphalt shingles can be laid over cedar shakes or shingles, a job best left to pros. When they tell me what neighborhood they're in, I can also make a good guess about how many layers of shingles are already on the roof. Overlap the rises and dips if using corrugated sheets, or lay flat sheeting with a slight vertical overlap.
Attempting to vent the underside of the metal simply guarantees that it will condense and drip often. Aluminum and copper is particular can be susceptible to denting when hailstones approach golf-ball size. The insulation will be cellulose in the ceiling. Can You Put Metal Roof Over Shingles — One question we are often asked is — can you install metal roofing over shingles? And a good job involves installing new flashings rather than relying on the existing ones. I use sheets of plywood and rubber tumble mats to minimize the risk.
We have all the metal roofing accessories you'll need! Steel is harder and fares better in hailstorms, but if you live in a region where such catastrophic hail can occur, be aware of this when considering metal. It will prevent the ridge from lying flat on the metal. Here are some reasons to do that. He'll also be on the lookout for pre-existing damage that the homeowners might not have noticed. More information here Want a Real Person? Bad weather always seems to happen at inopportune times. Repeat for the following rows to the other end of the roof.
The crew worked tirelessly in extreme heat and completed the project on time and the clean up was everything they promised. Generally speaking, homeowners may not be able to create a seamless steel panel solution by themselves. This provides added protection against ice dams. . You will also need preformed closures or flashing to close the roof surface around vent stacks or chimneys.
I have heard just about every way there is to install metal roofing panels to prevent condensation: Some say to put down a 15 or 30 layer of felt over the sheathing, then the metal panels; in other words, not to use purlins or the metal will condensate like crazy; enough so that the water will find it's way through the layer of felt. I've been in tin-roof barns that practically rained down on you, but the air inside was hot and humid, and of course, there was no sheathing. Slipping and Sliding A wet roof deck is also a slippery deck. This provides a couple of benefits. Of course there's also a good chance that my paranoia gene might kick in hard and I'd do wrap anyhow. Any contractor telling you otherwise without due cause with your particular roof should be avoided. Use tin shears to cut gaps for pipes and exhaust vents.