Installation Advice
The product is designed to fit between 38mm thick trussed rafters or ceiling joists spaced at 600mm centres which provide a clear joist opening width of 562mm. If the roof design does not provide this joist opening width, a suitableopening must be formed. Trimmers must be installed across the ends of the frame. These should be spaced to give a clear opening length of 665mm.
Frame fixes with ten screws, three through each side & two through each end. Fit the loft access door after the ceiling has been plaster boarded & skimmed. The frame must be a good fit into the trimmed opening. Never force it into an opening that is too small. If the opening is too large use packers to ensure a good fit.
