Boarders and CONST_PROP_MOVEABLE

[hellboy]

Why boarders have moveable property?

for i = 1, 10 do
      local tempItem = tile:getThing(i)
      if tempItem == nil then
            break
      elseif tile:hasProperty(CONST_PROP_MOVEABLE, tempItem) then
            print(i..' '..tempItem:getId())
      end
end

Example output:

1 4551
2 8309
3 5901

1. - Boarder
2. - Nails
3. - Wood

How I can skipp boarders (using another propherty?)

#EDIT
Solved
tempItem:getType():isMovable()