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Cavity Wall Construction for a 4-5 bedroom detached house - Look at different options from 100mm to 125mm cavity construction with lightweight and medium dense blockwork
Timber Frame Construction for a 4-5 bedroom detached house - with 140mm stud walls with options for full fill mineral wool or partial fill PIR insulation
System Build Construction for a 4-5 bedroom detached house - Consider 142mm SIPs system or other alternative systems
Enhanced Construction for a 4-5 bedroom detached house - Using system builds and enhanced construction (such as Passivhaus) to further enhance the energy performance of your dwelling