The sarking has to be folded back onto the valley batten instead. If there is sarking on the sides of the valley, it will draw water into the roof cavity and cause roof leaks. Thanks for the video. Do you have any branches or do you know any roof repairs in Brisbane?
I need to fix my valley leakage. I only operate around the inner western suburbs of Sydney. Sorry, I do not know any good roofers in Brisbane. Hi Christiane, it is supposed to be a waterproofing tape.
We do not use it at all. I just have not found a reason to like it yet…. The old valleys on my tiled roof were pointed. Is it advisable to re-point them where they are damaged?
We do not bed the tiles along the edges of the valleys. Firstly, it is not required for waterproofing. Secondly, the bedding corrodes the edges of the valleys. Thirdly, the bedding can suck water in under the tiles along the valley and cause leaks. If the valleys are too flat and the previous roofer has bedded the valleys to try to stop leakage — then bedding was the wrong solution anyway.
Hi Jack When you mentioned not to bed the tiles along the edge of the valley, do you mean putting cement at the edge of the tiles at the valley? Hi Vicky, The sides of the valley along its length do not need cement bedding. The upstream end top of the valley usually terminates under ridge caps which have their own bedding. I have a cement valley with terracotta tiled roof.
Will gutter guard help keep it clear of debris? What other measures can I take to fix it from leaking again. Over time, this forms a dam and causes an overflow leak. Is there a difference in performance from using a colorbond valley vs a valley seal foam strip impregnated with bitumen? I think there is a mis-understanding. Your plumber says a colorbond valley because he is assuming that you are replacing the valley.
Therefore a colorbond valley is the way to go. Your roof restorer is not thinking of replacing the valley. That is why he is suggesting putting foam along the edges of the existing valley. Personally, I hate the foam idea. It perishes over time and drops out and block the valley — causing damming and overflows. I have recently installed a new tiled roof with a valley.
Its only 4 days gone and we have some moderate rain. I notice the roof membrane is wet on either side of the vally. What can cause this. Hi Rishad, I assume you mean that the sarking is wet on the side of the valley. It might be, for example, that a leak has developed where the cement holding the tiles surrounding the valley has crumbled. Then, the valley can be left and simply the cement can be replaced and the tiles reset.
For more severe problems, especially problems with the valley itself, a full replacement may well be needed. A full valley replacement is a big job, involving a significant amount of work and cost compared with a simple repair.
The tiles surrounding the valley will need to be removed as well as the underfelt, and possibly some timber section below.
These materials will all be replaced with the new valley in mind, so it sits flush in the right place. The removed tiles can be replaced with new cement. A replacement can be done within half a day with two workers, but of course, it depends on the size of the section so there is some variance. The water from both roof planes is channeled into the valley, so it carries the most water.
Therefore, the roof valley will see the most wear and is the second most likely spot on a roof to develop a leak. Manufacturers may require you to have a certain roof valley type in order to be covered by their limited warranty. So, your choice of roof valley installation method is critical to maintain your warranty and get the best longevity from your roof.
There are three main types of roof valleys: woven roof valley, closed roof valley and open roof valley. Each type has its own benefits and drawbacks.
In a woven valley, shingles are woven together through the valley. The roofing professional installs shingles on both planes at once.
When they reach the valley, they weave the shingles from each plane together, without having to cut them. A woven valley creates a continuous look. However, it is a challenge to precisely place the weave in the middle of the valley. Woven valleys are challenging to install with laminate shingles, which are stiffer and thicker than 3-tab shingles. They likely will not bend enough to be woven in neatly, especially not in cooler climates. Because of this, woven valleys are not recommended by most laminate shingle manufacturers.
Having woven valleys installed may void your limited warranty. Woven valleys also do not save the roofing professional in time or materials over closed-cut valleys. Instead, getting a proper weave could take more time than the simple cut a roofer has to do for a closed-cut valley.
As a result, woven valleys are now rarely seen. You can identify a closed-cut roof valley by the straight line of cut shingles running down the approximate middle of the valley. To get this look, a roofing professional installs the shingles on one roof plane first. They stop roughly 12 inches past the center of the valley. Then, they install the shingles on the second plane, allowing them to overlap the first layer.
Finally, they cut the second layer of shingles in a straight line two inches from the center of the valley. As a result of this installation method, the top layer of shingles overlaps the bottom by a few inches. Shingles installed, a closed-cut valley is likely not the best choice. As waters wind toward the sea, they add to natural twists in the land by stripping sediment from the outsides of bends and dumping it on the insides. The bulk of the rock and dirt is dredged from the bottom of the channel, a process called down cutting that can ultimately lead to deep, slender chasms like Black Canyon in Colorado's Gunnison National Park.
Some river and stream valleys, especially those in the mountains or located near the North and South Poles, are transformed by glaciers. The massive blocks of snow and ice slowly creep downhill where they will meet the least resistance: valleys already cut by rivers and streams. As the glaciers ooze, they pick up rocks and grind away at the valley floor and sides, pressing the "V" into a "U. Side valleys are formed by tributaries to streams and rivers and feed the main stem.
Where the main channel is carved deeper than the tributary, as commonly occurs during glaciations, the side valleys are left hanging. Waterfalls often cascade from the outlet of the upper valley into the drainage below. Hollows, like those in Appalachia , are small valleys nestled between mountains or hills.
The red of cactus blooms pops in a Grand Canyon valley. Cut by the Colorado River over millions of years, the Grand Canyon is considered one of the finest examples of arid-land erosion in the world.
The immense canyon is miles kilometers long and averages 4, feet 1, meters deep, but it is only 15 miles 24 kilometers across at its widest. Giant valleys, called rifts, are found where two pieces of Earth's crust are separated or split apart.
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