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What are the most common building defects observed by Building Control Authorities?

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Some of the most common building defects noted by the BCA's are listed below:

  1. Underfloor fill – panel fixings, pyrite etc. (Parts A, C and D)

  2. Moisture ingress – radon, DPC (Part C)

  3. Fire resistance – eaves, party walls, ducting (Part B)

  4. Sound transmission – flooring detail, insulation (Parts E and L)

  5. Condensation and mould growth (Part F)

  6. Frozen pipes, attic tank, stopcocks (Part G)

  7. Septic tanks overload, flooding (Part H)

  8. Flues, location, size, burners (Part J)

  9. Balcony, stair rails wrong height, glass (Part K)

  10. Steps to entrances (Part M)

  11. Non-existent BER calculations, stud fixings, cavities clear of mortar (Part L)

  12. Timber frame – fixings, vapour control, cavity barriers, fire stopping (Part L)

  13. Uncertified blocks (Parts A and D)

Fire safety Cavity Radon External insulation Cavity wall insulation Underfloor insulation Underfloor heating Blocks Radon barrier Radon sump DPC Underfloor heating pipes Air to water heat pump Air to air heat pump Air to ground heat pump Timber frame Ceiling insulation Roof insulation Attic Time and temperature Zone control Septic tanlk Fire stopping Fire mastic Fire wraps Fire board Moisture board Sound insulation Flooring Tongue and groove BER Building energy rating Water tank Bead insulation Pumped insulation Pump cavity External wall insulation Fire doors Eaves box Water vapour membrane Vapour control layer Fire cable