the builders experience – mere compliance to enhanced performance sustainable new homes and sound...
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The builder’s experience – “mere compliance to enhanced
performance”
Sustainable new homes and sound insulation conference
Dave Poole
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Safety first
So you think you have problems!
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Pre 2003: Case Study 1Houses
ADE “Deemed to satisfy constructions” – The cost of failure!
Post occupation remedial costs
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Pre 2003: Case Study 2Apartments
Fencing / skips / protection to common areas + labour
Post occupation remedial costs
Removal / storage / return of furniture & soft coverings
Hotel accommodation for occupiers – 12 weeks
Remove & replace wall coverings / kitchens / electrics & bathrooms
New ceilings and flanking wall treatments + cleaning & redecoration
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Pre-completion Testing (PCT)
Requires PERSON CARRYING OUT THE WORK to ensure:
Appropriate sound testing is carried out
Give results to BCB no later than 5 days after completion
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ADE Guidance constructions
Built correctly example constructions achieve sound insulation requirements
PCT - Proof of performance “as built”
Testing raises standards!
Assured customer satisfaction?
“if” built correctly “should” meet the requirements
Failed tests
Remedial works
Delay in legal completions
Additional testing
Costs and litigation
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robustdetails
• Register each plot with RDL
• Build in accordance with the
relevant RD specification
• Give registration document
to the BCB [before work starts]
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robustdetails approach
Robust Detail Status
Familiar construction
Meets thermal performance
Cost effective
Poor visibility
Continuity of batts
Blockwork joints
Checklists not completed
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No Check sheets filled out as
yet!
Site Manager unaware of need
to use Check sheets!
Site Manager unable to confirm
density of blocks used in Party
or Flanking walls!
Parge coat was smooth!
Wall ties to Party Wall are not
the correct type!
Cavity width varied – in places
less than 75mm!
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Post 2003: Case Study 3Houses
Constructions outside the Guidance and robust details
Range 52 – 58D +Cntw tr
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Beyond Compliance
A commitment to carry out a programme of PCT based on frequency and performance
1 credit = 50% of walls / floors ADE pass
2 credits = 75% of walls / floors ADE pass
3 credits = 75% of walls / floors ADE + / - 3dB
4 credits = 75% of walls / floors ADE + / - 5dB
(Based on 6No dwellings of the same type)
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PCT sample data
30
35
40
45
50
55
60
65
Separating walls
dB
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PCT sample data
30
35
40
45
50
55
60
65
Separating floors Impact
dB
30
35
40
45
50
55
60
65
Separating floors Airborne
dB
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Industry wide training needed!
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www.bryant.co.uk