Use roof cement along the bottom edges of any loose felt first and firmly pressed down so that the roof becomes flat once again. Whether you have found a crack or a blister, once it has dried, it is important to seal it up. Seal up the Roof Once you Have Eliminated the Issue. Propane torches or portable heaters will work, but make sure you take all appropriate safety measures so that you and your building stay safe. You can supply artificial heating methods to encourage the process. In some climates, it can be virtually impossible to let the roof dry on its own. Is It Too Cold or Too Wet to Dry the Roof? You may need to let the edges of the blister dry after this and some blisters may be so large that you need to propped the edges up. Remove the edges of the blister and then mop up any water that may be contained within the bubble. You need to go to the full depth of the bubble. If you found a blister, then take a sharp knife and slice it open right down the middle. This usually is in the form of a blister within the tar. Will also be looking for places where the tar may have not sealed the roof properly. As you are doing this, you will want to look or any cracks that might be in the felt of the roof. Once the roof has dried, will want to make sure you brush away any debris that may be in potential leak area. Remove any water that may still be present and allow the surface dry. Usually this is pretty easy to see once you get eyes on the problem. It is in these low spots where the greatest potential of leaking happens. As the building settles, there will be low spots that begin to develop. Although the roof is flat, it isn’t perfectly flat. Where Are the Low Spots?įlat roofs tend to be built with a number of layers of tar and felt. Here’s what you’ll want to look for on the outside. Just because the water dripping through the ceiling doesn’t mean that directly above that leak is where the water is coming in from the roof. If you want to know how to fix a flat roof leak, then the first step is to find where the leak is occurring from an exterior standpoint. Any roof can leak, but the flat roof provides a rather intense challenge.
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