Mk 1 & 2 DIY SIP Frame with GRP Skin & Built in Window
Grp corrugated sky light roof sheet, 1m x 2.3m
2 upright beams (nail gunned & glued door edge off cuts )
Cross beams added, ends screwed & triangular plastic door frame off cuts screwed in for cross bracing
Close up
Further close up
Close up of outer & insert of corner brace
Close up showing 4 screws
Other side view,
End view
few screws added (sealed with silicone) to stop expanding foam pushing sheet & beams apart
closeup of end screw, perhaps should have washers
closeup of middle screws, perhaps should have washers
Scrap Polystyrene put in 2 parts of panel to save foam (other part left clear as its the window)
Polystyrene forced into ridge gaps to stop expanding foam escaping into window space
Expanding foam applied , along with one scrap panel of mdf / polystyrene
Poly appears to stop foam creeping / leaking
60cm wide Turkey size aluminium kitchen foil applied . I used this as it
was the cheapest light reflective, fire resistant material I could
think of .
This could be an interior finish or see 2 pics below
for extra panels
Close up . 2 strips of foil
Foil applied the other way on smaller part of panel
If required it can be covered in plastic panels, though more insulative, it adds more expense / weight
Pic of other side, with clear window (Insulated parts should be painted to protect grp from Uv. reflect heat & because its ugly
Close up
Close up
Mk 2
Panel with no window & single middle support
Other side view
Double Wide Beams ( most likely design)
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