From: Matthew Heyes [matthew.heyes@colejarman.com]

Sent: 23 May 2016 11:13

To: 'BPR Architects'

Cc: 'Iain Brewester'; Anna P Fleming; Adam Sharpe

Subject: RE: 69 highgate High St. Highgate. London URGENT INFORMATION

Follow Up Flag: Follow up

Flag Status: Flagged

Mike,

The CSH only applies as part of the residential development so it is the floor between the flat and the retail unit which must achieve this performance. As the unit below is retail only the airborne sound insulation is of concern.

The construction shown within our original sound insulation memo is shown below:

Concrete on a profiled metal deck with a maximum depth of 170mm and a minimum depth of 90mm (min density 2400kg/m3). A ceiling will be required within the retail unit comprising two layers of 10kg/m2 gypsum based board on an MF grid providing a minimum void of 150mm with 50mm mineral wool within the cavity.

The construction above is capable of achieving +5 dB above building regulations.

In order to ensure that the structural steel beams within the floor aren’t a significant weakness it is recommended that they are filled with mineral wool.

Regards

Matthew Heyes
Cole Jarman
Manchester Office
t +44 (0)161 209 3644
www.colejarman.com

Address Details: Head Office | Manchester Office

From: Matthew Heyes
Sent: 23 May 2016 09:23
To: 'BPR Architects'; Adam Sharpe
Cc: Iain Brewester; Anna P Fleming
Subject: RE: 69 highgate High St. Highgate. London URGENT INFORMATION

Mike,

Sorry for the delay in responding to you. I am looking at this now and will get back to you and Anna today. For reference I’ve attached our previous sound insulation memo which provides details of how the floor will achieve the usual building control requirements.

Regards

Matthew Heyes
Cole Jarman
Manchester Office
t +44 (0)161 209 3644
www.colejarman.com

Address Details: Head Office | Manchester Office

From: BPR Architects [mailto:info@birdsportchmouthrussum.com]
Sent: 20 May 2016 17:48
To: Adam Sharpe
Cc: Iain Brewester; Anna P Fleming; Matthew Heyes
Subject: Re: 69 highgate High St. Highgate. London URGENT INFORMATION

Dear Adam,

Thank you  - it is critical that we and Anna Fleming receive this on Monday for the reasons already explained.

Have a good weekend,

Best wishes,

Mike

Birds Portchmouth Russum Architects Ltd.
Unit 11, Union Wharf
23 Wenlock Road
London N1 7SB

www.birdsportchmouthrussum.com
t: 020 7253 8205

This message has been sent on behalf of Birds Portchmouth Russum Architects (BPR) and contains information intended for the addressee(s). If you are not the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited. If you have received this e-mail in error, please notify BPR immediately by  e-mail and delete any copies made from your system.

From: Adam Sharpe <adam.sharpe@colejarman.com>
Date: Friday, 20 May 2016 16:57
To: BPR ARCHITECTS <info@birdsportchmouthrussum.com>
Subject: Re: 69 highgate High St. Highgate. London URGENT INFORMATION

Mike, 

Apologies for my delay in getting back to you on this and for your trouble getting through to us today. My colleague Matthew Heyes has a better understanding of this subject will be answering your queries in due course.

Regards

Adam Sharpe
Cole Jarman Ltd
adam.sharpe@colejarman.com
01932 829007
07802 866066

On 20 May 2016, at 13:28, BPR Architects <info@birdsportchmouthrussum.com> wrote:

Dear Adam,

We would be grateful if you could respond to this email as a matter of considerable urgency ( This was as originally requested in Elise's email of the 11 May as below ).  I have phoned yesterday and could not get an answer and today have been told everybody at Cole Jarman is on a training course.

As part of the Sustainability study there is a requirement that the airborne and impact sound attenuation will be 5dB better than Part E and that the Acousticain or client confirms it.  We assume the building achieves this as sound attenuation has been a key part of the detail design requirements of the client.  However we do not seem able to glean this information directly from your acoustic report.  Could you therefore confirm the acoustic performance is achieved and that testing will be carried out as soon as possible on Monday.

The urgency is highly critical  - this remains the one outstanding element of the Sustainability Report and the Contractor is unable to commence on site until the Sustainability Plan element is ticked off by the Council. 

Please also copy your response to Anna Fleming of Synergy Consulting who are coordinating all this information.

Kind regards,

Mike Russum

Birds Portchmouth Russum Architects Ltd.
Unit 11, Union Wharf
23 Wenlock Road
London N1 7SB

www.birdsportchmouthrussum.com
t: 020 7253 8205

This message has been sent on behalf of Birds Portchmouth Russum Architects (BPR) and contains information intended for the addressee(s). If you are not the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited. If you have received this e-mail in error, please notify BPR immediately by  e-mail and delete any copies made from your system.

From: BPR ARCHITECTS <info@birdsportchmouthrussum.com>
Date: Wednesday, 11 May 2016 18:26
To: Adam Sharpe <adam.sharpe@colejarman.com>
Cc: Leon Gadsdon <leon@enmassedesign.co.uk>, Iain Brewester <iain@westsidelondon.com>, Mathew Heyes <mathew.heyes@colejarman.com>
Subject: Re: 69 highgate High St. Highgate. London

Dear Adam,

We are required by Camden Council to complete a Sustainability Plan which confirms that we meet Code for Sustainable Homes Level 3 (even though the CfSH has been abolished!).  It is an onerous piece of work and there is a question on Acoustics that we were hoping you could answer.

The requirement is that the airborne and impact sound attenuation will be 5dB better than Part E – from your Acoustic Report completed for the project in February, are you able to confirm that this target will be met? 

Many thanks in advance for your help resolving this issue.

Best,

Elise

Birds Portchmouth Russum Architects Ltd.
Unit 11, Union Wharf
23 Wenlock Road
London N1 7SB

www.birdsportchmouthrussum.com
t: 020 7253 8205

This message has been sent on behalf of Birds Portchmouth Russum Architects (BPR) and contains information intended for the addressee(s). If you are not the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited. If you have received this e-mail in error, please notify BPR immediately by  e-mail and delete any copies made from your system.

From: Adam Sharpe <adam.sharpe@colejarman.com>
Date: Monday, 29 February 2016 16:51
To: BPR ARCHITECTS <info@birdsportchmouthrussum.com>
Cc: Leon Gadsdon <leon@enmassedesign.co.uk>, Iain Brewester <iain@westsidelondon.com>, Mathew Heyes <mathew.heyes@colejarman.com>
Subject: RE: 69 highgate High St. Highgate. London

Dear Mike,

Those suggestions are all perfectly fine.

If you have any other queries please don’t hesitate to contact me.

Kind Regards

Adam Sharpe
Cole Jarman
Head Office
t +44 (0)1932 829007
www.colejarman.com

Address Details: Head Office | Manchester Office

From: BPR Architects [mailto:info@birdsportchmouthrussum.com]
Sent: 29 February 2016 14:19
To: Adam Sharpe
Cc: Leon Gadsdon (leon@enmassedesign.co.uk); Iain Brewester; Matthew Heyes
Subject: Re: 69 highgate High St. Highgate. London

Dear Adam,

Thank you for the amended window glazing spec.

There are a number of windows of which you make no suggestion for the acoustic spec.  Based upon your spec we put forward the following acoustic types for those windows. We would be grateful for your confirmation as appropriate or correction as necessary.

W1F 9  - Master bedroom ensuite bathroom – Type A

W1F 11 & Q12– Corridor , propose same spec as above – Type C

W  UG 13, W 1F 13  7 W2F 13 – Glazed slot – Type C.

All other windows not already specced will be Type D

We look forward to your response.

Kind regards,

Mike Russum

Birds Portchmouth Russum Architects Ltd.
Unit 11, Union Wharf
23 Wenlock Road
London N1 7SB

www.birdsportchmouthrussum.com
t: 020 7253 8205

This message has been sent on behalf of Birds Portchmouth Russum Architects (BPR) and contains information intended for the addressee(s). If you are not the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited. If you have received this e-mail in error, please notify BPR immediately by  e-mail and delete any copies made from your system.

From: Adam Sharpe <adam.sharpe@colejarman.com>
Date: Friday, 26 February 2016 16:17
To: BPR ARCHITECTS <info@birdsportchmouthrussum.com>
Cc: Leon Gadsdon <leon@enmassedesign.co.uk>, Iain Brewester <iain@westsidelondon.com>, Matthew Heyes <mathew.heyes@colejarman.com>
Subject: RE: 69 highgate High St. Highgate. London

Mike,

Please find a revised version of our Noise Breakin Assessment attached. As well as specifying that the roof lights within the living level will require Type C glazing, we have also spotted and rectified a mistake in section 5.2 regarding the glazing to be used for the windows facing onto Snow Hill within the master bedroom. To this end, the location details and required performance values have been updated accordingly.

If there are any further queries, please do not hesitate to contact either myself or Matthew.

Regards

Adam Sharpe
Cole Jarman
Head Office
t +44 (0)1932 829007
www.colejarman.com

Address Details: Head Office | Manchester Office

From: BPR Architects [mailto:info@birdsportchmouthrussum.com]
Sent: 26 February 2016 14:35
To: Matthew Heyes
Cc: Leon Gadsdon (leon@enmassedesign.co.uk); Iain Brewester; Adam Sharpe
Subject: Re: 69 highgate High St. Highgate. London

Dear Matthew,

Many thanks for the helpful explanation of your findings in our telephone conversation this morning.

One question I forgot to ask – is there an acoustic spec for the glazed roof lights  to the living level.

Kind regards,

Mike Russum

Birds Portchmouth Russum Architects Ltd.
Unit 11, Union Wharf
23 Wenlock Road
London N1 7SB

www.birdsportchmouthrussum.com
t: 020 7253 8205

This message has been sent on behalf of Birds Portchmouth Russum Architects (BPR) and contains information intended for the addressee(s). If you are not the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited. If you have received this e-mail in error, please notify BPR immediately by  e-mail and delete any copies made from your system.

From: Matthew Heyes <mathew.heyes@colejarman.com>
Date: Thursday, 25 February 2016 18:11
To: BPR ARCHITECTS <info@birdsportchmouthrussum.com>
Cc: Leon Gadsdon <leon@enmassedesign.co.uk>, Iain Brewester <iain@westsidelondon.com>, Adam Sharpe <adam.sharpe@colejarman.com>
Subject: RE: 69 highgate High St. Highgate. London

Mike,

Please find our updated Noise Breaking assessment report and our sound insulation memo.

With regards to internal noise levels within the flat we have reviewed the impact of using higher performance glazing and vents (than those specified within the report) but we found that the improvement is very marginal (around 1dB) and so it didn’t appear to be worth the additional cost. The reason for the small improvement is the performance of the walls and so any real improvement above what we have specified would require significant change in the façade build up. The current proposals meet the recommended internal noise levels which are usually proposed for residential developments and so are considered suitable.

If you have any questions regarding the attached please don’t hesitate to contact me.

Regards

Matthew Heyes
Cole Jarman
Manchester Office
t +44 (0)161 209 3644
www.colejarman.com

Address Details: Head Office | Manchester Office

From: BPR Architects [mailto:info@birdsportchmouthrussum.com]
Sent: 19 February 2016 18:44
To: Adam Sharpe
Cc: Leon Gadsdon; Iain Brewester
Subject: 69 highgate High St. Highgate. London

Dear Adam,

Further to our telephone conversation we would like to confirm the current strategy for the envelope and the environmental servicing so that you are aware of what is realistic in terms of maximising the acoustic envelope to the new building.  I should reiterate that our client, Iain Brewester,  is extremely sensitive to noise, particularly when asleep at night-time - as discussed he currently sleeps next door with ear plugs in.  As you are already aware the location has varying noise sources at night–time ranging from heavy duty traffic braking and accelerating by mini roundabouts immediately outside on the High Street and drunken louts tipping down Snow Hill into Pond Square.

In terms of the design of the building the general environmental strategy has been developed with acoustic protection in mind as follows. Generally the windows will be shut and the ventilation is achieved by continuous mechanical air extraction from the bathrooms, undercut doors where necessary and trickle ventilation supplied through the acoustic trickle vents in Snow hill window heads.  Due to any possible overheating arising from the carefully managed window opening there will be 2 chiller units recycling internal air and feeding the master bedroom, the corridor outside the kids bedrooms and the living level - where there is a greater solar build up from the glazed doors to the external terrace and the roof lanterns.

Clearly we are looking for the best acoustic attenuation on the bedroom level at the first floor (and the lounge in the nose of the living area). At bedroom level the windows facing directly to the High Street have anodised aluminium frames, they are sealed shut and have triple glazed panels.  The windows facing the similarly noisy West Hill have anodised aluminium frames, and  triple glazed panels but due to the fretted metal screen in front they need to open so that the external face can be cleaned.  The slot windows facing Snow Hill have anodised aluminium frames with double glazed panels floor to ceiling panels with their upper half openable with tilt & turn windows and acoustic trickle vents set within the frame above.  We have already forwarded the wall construction to you and would draw your attention to the floor construction at bedroom level.  Here we are conscious of the potential for road noise penetration through the shop windows through the ceiling & floor slab so in this instance we are proposing that the steel structure has a comflor 80 ribbing dropped to soffit level and filled with in situ concrete.  In turn this will have 20 mm acoustilay topped with either timber boarding or carpet.  The ceiling zone to the bedroom level and floor to the living level will have a Posi-joist construction to allow all the services to be treaded to the living and bedroom levels and will have a screed and resin floor.

The living level at the second floor has the same window arrangement as the bedroom level but will have full height double glazed  doors leading to the terrace overlooking Pond Square.  The wall make up will be identical to the bedroom level below.  We are currently proposing that for build ability and cost reasons that the roof construction will be 150 deep timber joists with mineral wool between.  However there is a considerable area of sedum roofing upon this roof to add to the acoustic attenuation.

We are seeking to maximise the acoustic attenuation to the building – ideally within what we believe are the sensible strategy outlined above.  Clearly the bedroom level and more particularly the master bedroom suite and lounge at living level are the most critical areas.  We would be grateful if you could consider all of this, together with the comments we made in our earlier email and then phone Iain Brewester so that you and he are entirely clear about the level of acoustic attenuation appropriate and then make recommendations to us about how best /appropriate to maximise acoustic attenuation.

Iain's work telephone number is 020 7434 0235.  

We trust all this is clear – we look forward to receiving your advice. We are issuing the tender drawings at the end of next week   - we would therefore be very grateful if you forward us the necessary information by end of play next Tuesday.

Kind regards,

Mike Russum

Birds Portchmouth Russum Architects Ltd.
Unit 11, Union Wharf
23 Wenlock Road
London N1 7SB

www.birdsportchmouthrussum.com
t: 020 7253 8205

This message has been sent on behalf of Birds Portchmouth Russum Architects (BPR) and contains information intended for the addressee(s). If you are not the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited. If you have received this e-mail in error, please notify BPR immediately by  e-mail and delete any copies made from your system.

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