diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/IXLWorksheet.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/IXLWorksheet.cs
index 4ba4b46..623aeb5 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/IXLWorksheet.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/IXLWorksheet.cs
@@ -358,5 +358,7 @@
         IXLRows RowsUsed(Func<IXLRow, Boolean> predicate);
         IXLColumns ColumnsUsed(Boolean includeFormats = false, Func<IXLColumn, Boolean> predicate = null);
         IXLColumns ColumnsUsed(Func<IXLColumn, Boolean> predicate);
+
+        IXLRanges MergedRanges { get; }
     }
 }
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRangeBase.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRangeBase.cs
index d935dac..57bf511 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRangeBase.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRangeBase.cs
@@ -285,13 +285,15 @@
         public IXLRange Merge()
         {
             string tAddress = RangeAddress.ToString();
-            Boolean foundOne =
-                Worksheet.Internals.MergedRanges.Select(m => m.RangeAddress.ToString()).Any(
-                    mAddress => mAddress == tAddress);
+            var mergedRanges = Worksheet.Internals.MergedRanges.ToList();
+            foreach (var mergedRange in mergedRanges)
+            {
+                if (mergedRange.Intersects(tAddress))
+                    Worksheet.Internals.MergedRanges.Remove(mergedRange);
+            }
 
             var asRange = AsRange();
-            if (!foundOne)
-                Worksheet.Internals.MergedRanges.Add(asRange);
+            Worksheet.Internals.MergedRanges.Add(asRange);
 
             // Call every cell in the merge to make sure they exist
             asRange.Cells().ForEach(c => { });
@@ -368,7 +370,8 @@
 
         public bool Intersects(string rangeAddress)
         {
-            return Intersects(Range(rangeAddress));
+            using (var range  = Worksheet.Range(rangeAddress))
+                return Intersects(range);
         }
 
         public bool Intersects(IXLRangeBase range)
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorksheet.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorksheet.cs
index 62a3033..3a8912d 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorksheet.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorksheet.cs
@@ -1265,5 +1265,7 @@
                                                        && n.Ranges.Count == 1)
                                 .Ranges.First();
         }
+
+        public IXLRanges MergedRanges { get { return Internals.MergedRanges; } }
     }
 }
\ No newline at end of file
diff --git a/ClosedXML/ClosedXML/ClosedXML_Tests/ClosedXML_Tests.csproj b/ClosedXML/ClosedXML/ClosedXML_Tests/ClosedXML_Tests.csproj
index 0aa306b..a8d5c26 100644
--- a/ClosedXML/ClosedXML/ClosedXML_Tests/ClosedXML_Tests.csproj
+++ b/ClosedXML/ClosedXML/ClosedXML_Tests/ClosedXML_Tests.csproj
@@ -82,6 +82,7 @@
     <Compile Include="Excel\Ranges\XLRangeAddressTest.cs" />
     <Compile Include="Excel\Ranges\XLRangeBaseTest.cs" />
     <Compile Include="Excel\Rows\RowsTests.cs" />
+    <Compile Include="Excel\Worksheets\XLWorksheetTests.cs" />
     <Compile Include="Utils\ExcelDocsComparer.cs" />
     <Compile Include="Examples\DeleteTests.cs" />
     <Compile Include="Examples\LoadingTests.cs" />
diff --git a/ClosedXML/ClosedXML/ClosedXML_Tests/Excel/Worksheets/XLWorksheetTests.cs b/ClosedXML/ClosedXML/ClosedXML_Tests/Excel/Worksheets/XLWorksheetTests.cs
new file mode 100644
index 0000000..2ad2ef2
--- /dev/null
+++ b/ClosedXML/ClosedXML/ClosedXML_Tests/Excel/Worksheets/XLWorksheetTests.cs
@@ -0,0 +1,26 @@
+using ClosedXML.Excel;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using System.Linq;
+using System;
+using System.IO;
+
+namespace ClosedXML_Tests
+{
+    [TestClass()]
+    public class XLWorksheetTests
+    {
+        [TestMethod()]
+        public void MergedRanges()
+        {
+            var ws = new XLWorkbook().Worksheets.Add("Sheet1");
+            ws.Range("A1:B2").Merge();
+            ws.Range("C1:D3").Merge();
+            ws.Range("D2:E2").Merge();
+            
+            Assert.AreEqual(2, ws.MergedRanges.Count);
+            Assert.AreEqual("A1:B2", ws.MergedRanges.First().RangeAddress.ToStringRelative());
+            Assert.AreEqual("D2:E2", ws.MergedRanges.Last().RangeAddress.ToStringRelative());
+        }
+
+    }
+}