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RSL can supply and fit all manner of retrofit shutter solutions from the conventional retrobox albeit to RSL’s own superior design right through to inbuilt box solutions.
If the inbuilt lintel is not required the RSL box range can cover all the other situations whether on new build or existing structures.
Finished to any RAL colour as standard RSL can make a retrobox look neat and presentable when an inbuilt solution is not possible.
 
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