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Been asked to prepare a loft space for a future Dormer conversion. Its a bungalow with single span, 47x100 ceiling joists. my question is; How do I manage the depth difference between the flooring joist needed and the existing ceiling joist? Do I need to replace the joists completely or is there a trick I can use that stays within building regs.
new joists will be at least 170mm deep, maybe even 195mm depending on the span
new joists will be at least 170mm deep, maybe even 195mm depending on the span