It sounds as though your builder has adopted a belt and braces approach in that he may have insulated over a traditional weathering detail.
Given that external insulation depends wholly on the external render applied to it for its weathering, this may be a good idea.
The building envelope is what separates the inner environment from the outer ambient temperature and weather.
It includes the floor slab, walls, roof(s), windows, doors and has support, weathering and insulation details.
A penetration of the building envelope requires detailing for weathering and to minimize cold bridging.
Penetrations which traverse structural cavities may also require fire sealing from the cavities.
The Technical Guidance Documents offer guidance on this, as do these approved details.
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These http://www.environ.ie/en/Publications/DevelopmentandHousing/BuildingStandards/FileDownLoad,18752,en.pdf (details) are for solid and cavity walls.
Detail 2.20 shows the head with external insulation
Detail 2.21 shows the jamb with external insulation
These details only show external insulation.
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These http://www.environ.ie/en/Publications/DevelopmentandHousing/BuildingStandards/FileDownLoad,18756,en.pdf (details) are for hollow block walls
Detail 6.19 shows the lintol with internal insulation
Detail 6.20 shows the jamb with internal insulation
Detail 6.21 shows the concrete cill with internal insulation
These details only show internal insulation.
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The requirement to prevent cold bridging through the reveals is present in all details.
I'm not certain you can mix and match per se, but the weathering layer in the case of the solid and hollow walls, regardless of the position of the insulation, is the external render.
The weathering function of the render is totally underplayed in these details, which centre on sealing the walling and insulation to avoid cold bridges.
The threshold details are not shown and these can be the hardest to get right.
With the prevalence of large bi-folding doors, they are very important.
These are from the DOE website.
They are not my details.
ONQ
[broken link removed]
All advice on AAM is remote from the situation and cannot be relied upon as a defence or support - in and of itself - should legal action be taken.
Competent legal and building professionals should be asked to advise in Real Life with rights to inspect and issue reports on the matters at hand.