Any wooden window frame with a single glass is easy to turn into a double, having received a kind of glazing is not worse than common now brand.
This will require a brace or composite rod-the glass bead and a slightly larger format than is setup in the window so that you can lay on the frame and press with rail, bothering and seal with a rubber strip or putty.
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We usually dig? Pushing leg, bury the shovel, then bend down, take the lower part of the handle, raise the shovel from the ground and turned a seam, having unbent, then re-bury and bend...
