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Probably. Need a preliminary BER (i.e. get someone to do a BER based on your specification and then vary it depending on putting in triple glazing).Would triple glazed option be worth the extra money?
Generally no need for insulation. 6" screed sounds huge - I assume the Engineer sized it?Precast slab and 6" of screed between ground and 1st floor with suspended ceiling and 12.5" plasterboard (No insulation needed?)
You need a preliminary BER to tell you.I will also run 200mm of rockwool along flat part of attic roof. Proposed u value of 0.12/.013??
Would insulated plasterboard be overkill?
It might cause problems depending on how well draught proofed and insulated it was.Also a very topical question, is whether to leave trap doors along wall for extra storage or does this cause trouble with heat loss?
Sounds pretty good. The fact that you are asking the questions and that it isn't a BER person controlling everything (from airtightness to insulation) is slightly worrying however.As asked at start, is that a sufficent spec of insulation or can someone advise me of another idea?
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