Storage buildings

How do I create a front porch? Can I also order a storage building with a different length or height?
Do the storage buildings have gutters and drainpipes? Can I make a storage building with an entry gate? Can I place the storage building on a stem wall? What is Dripstop®? Can I place a window in a storage building? Can the man door also be placed on the left? Do the storage buildings comply with the NEN 1087 ventilation standard? Is it possible to install solar panels on the roof of the storage building? Can I order a storage building without a roll-up door? How is the storage building secured against intrusion? Can I paint the storage building? Can I place a higher or wider roll-up door in the storage building? Are the storage buildings available in different colours? Can two storage buildings be permanently constructed beside each other? Can the storage building (partly) be constructed without sheet material? Can the roll-up door be moved to the side wall? Do you offer insulation? Do you have structural calculations available? Can the man door be placed on the left as well? How are these storage buildings anchored? What about rainwater drainage? I need a different length. Is that possible? Is it possible to install a steel building on pavement or asphalt? Is it easy to install a roll-up door?
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