diff --git a/src/Mod/Arch/ArchWall.py b/src/Mod/Arch/ArchWall.py
index 04513aefac..1132e8458d 100644
--- a/src/Mod/Arch/ArchWall.py
+++ b/src/Mod/Arch/ArchWall.py
@@ -553,9 +553,13 @@ class _Wall(ArchComponent.Component):
             obj.addProperty("App::PropertyInteger","Face","Wall",QT_TRANSLATE_NOOP("App::Property","The face number of the base object used to build this wall"))
         if not "Offset" in lp:
             obj.addProperty("App::PropertyDistance","Offset","Wall",QT_TRANSLATE_NOOP("App::Property","The offset between this wall and its baseline (only for left and right alignments)"))
-        if not "Refine" in lp:
-            obj.addProperty("App::PropertyEnumeration","Refine","Wall",QT_TRANSLATE_NOOP("App::Property","Select whether or not and the method to remove splitter of the Wall. Currently Draft removeSplitter and Part removeSplitter available but may not work on complex sketch."))
-            obj.Refine = ['No','DraftRemoveSplitter','PartRemoveSplitter']
+
+        # See getExtrusionData(), removeSplitters are no longer used
+        #if not "Refine" in lp:
+        #    obj.addProperty("App::PropertyEnumeration","Refine","Wall",QT_TRANSLATE_NOOP("App::Property","Select whether or not and the method to remove splitter of the Wall. Currently Draft removeSplitter and Part removeSplitter available but may not work on complex sketch."))
+        #    obj.Refine = ['No','DraftRemoveSplitter','PartRemoveSplitter']
+        # TODO - To implement in Arch Component ?
+
         if not "MakeBlocks" in lp:
             obj.addProperty("App::PropertyBool","MakeBlocks","Blocks",QT_TRANSLATE_NOOP("App::Property","Enable this to make the wall generate blocks"))
         if not "BlockLength" in lp:
@@ -600,8 +604,18 @@ class _Wall(ArchComponent.Component):
                 for b in bplates:
                     b.Placement = extdata[2].multiply(b.Placement)
                     b = b.extrude(extv)
-                    shps.append(b)
-                base = Part.makeCompound(shps)
+
+                    # See getExtrusionData() - not fusing baseplates there - fuse solids here
+                    # Remarks - If solids are fused, but exportIFC.py use underlying baseplates w/o fuse, the result in ifc look slightly different from in FC.
+                    #shps.append(b)
+                    if shps:
+                        shps = shps.fuse(b) #shps.fuse(b)
+                    else:
+                        shps=b
+                    # TODO - To let user to select whether to fuse (slower) or to do a compound (faster) only ?
+                #base = Part.makeCompound(shps)
+                base = shps
+
             else:
                 bplates.Placement = extdata[2].multiply(bplates.Placement)
                 base = bplates.extrude(extv)
@@ -960,23 +974,38 @@ class _Wall(ArchComponent.Component):
                                 sh.fix(0.1,0,1) # fixes self-intersecting wires
                                 f = Part.Face(sh)
                                 if baseface:
-                                    if layers:
-                                        if layers[i] >= 0:
-                                            baseface.append(f)
-                                    else:
-                                        baseface = baseface.fuse(f)
-                                        if obj.Refine == 'DraftRemoveSplitter':
-                                            s = DraftGeomUtils.removeSplitter(baseface)
-                                            if s:
-                                                baseface = s
-                                        elif obj.Refine == 'PartRemoveSplitter':
-                                            baseface = baseface.removeSplitter()
+
+                                    # To allow exportIFC.py to work properly on sketch, which use only 1st face / wire, do not fuse baseface here
+                                    # So for a sketch with multiple wires, each returns individual face (rather than fusing together) for exportIFC.py to work properly
+                                    # "ArchWall - Based on Sketch Issues" - https://forum.freecadweb.org/viewtopic.php?f=39&t=31235
+                                    #
+                                    baseface.append(f)
+                                    # The above make Refine methods below (in else) useless, regardless removeSpitters yet to be improved for cases do not work well
+
+                                    '''  Whether layers or not, all baseface.append(f) '''
+
+                                    #if layers:
+                                    #    if layers[i] >= 0:
+                                    #        baseface.append(f)
+                                    #else:
+                                        #baseface = baseface.fuse(f)
+                                        #if obj.Refine == 'DraftRemoveSplitter':
+                                        #    s = DraftGeomUtils.removeSplitter(baseface)
+                                        #    if s:
+                                        #        baseface = s
+                                        #elif obj.Refine == 'PartRemoveSplitter':
+                                        #    baseface = baseface.removeSplitter()
                                 else:
-                                    if layers:
-                                        if layers[i] >= 0:
-                                            baseface = [f]
-                                    else:
-                                        baseface = f
+                                    baseface = [f]
+
+                                    '''  Whether layers or not, all baseface = [f] '''
+
+                                    #if layers:
+                                    #    if layers[i] >= 0:
+                                    #        baseface = [f]
+                                    #else:
+                                        #baseface = f
+
                         if baseface:
                             base,placement = self.rebase(baseface)
         else: