Jim Miller Design Ltd
92 Livingstone Road
Hove
East Sussex
BN3 3WL

CPHD Consultant

AECB
Passivhaus Trust
green building partnership
July 26th, 2018 | For Sale | jimmiller

Just looking for some second hand remote monitoring equipment to measure humidity in a timber sub floor.  Perhaps Omnisense?  A gateway plus a few sensors?

July 11th, 2018 | Events | jimmiller

This looks interesting:

Building Biology is the holistic study of the interrelationships between humans and their man-made environment

https://www.greenregister.org.uk/civicrm/event/info?id=437

July 11th, 2018 | BSBM / AECB | jimmiller

Interesting discussion about the feasibility of large scale retrofit last night!  NO meeting in August as people are often away but returning on Tuesday 11th September from 7pm at the Battle of Trafalgar, 34 Guildford Road, BN1 3LW.  Please do bring your ideas, drawings and projects along for an informal discussion!  Everyone very welcome.  Details

July 09th, 2018 | BSBM / AECB | jimmiller

It’s BSBM tomorrow, Tuesday 10th from 7pm at the Battle of Trafalgar, 34 Guildford Road, BN1 3LW.  Please do bring your ideas, drawings and projects along for an informal discussion!  Everyone very welcome.  Details

June 13th, 2018 | BSBM / AECB | jimmiller

Lively meeting last night.  Next meeting Tuesday 10th July from 7pm at the Battle of Trafalgar, 34 Guildford Road, BN1 3LW.  Please do bring your ideas, drawings and projects along for an informal discussion!  Everyone very welcome.  Details

June 11th, 2018 | Fenestration, Passivhaus retrofit | jimmiller

Secondary glazing was installed to this listed lodge in 2017 as stage 1 of a whole house retrofit to Passivhaus principles planned over the coming years.  ‘Traditional’ sliding sashes were chosen over inward opening ‘mock sash’ alternatives or aluminium systems to maintain the architectural detail, sight lines and operation.  The secondary glazing was made airtight while the existing fenestration was left without draught seals to reduce the risk of condensation between the new and old.  The requirement to retain the internal blinds resulted in a significant spacing between the existing and secondary glazing which required Krypton in place of argon to reduce the thickness of the glazing units.  Accoya timber was used for it’s stability and durability and concealed balances mounted in the sashes to improve airtightness and reduce cold bridging through the frames.  Some windows were fitted with a fixed panel rather than a sliding sash to reduce the cost and visual impact which required the ironmongery to be moved externally to allow cleaning.  The result is dramatically improved acoustics and significant improvement to the thermal performance while only a minimal visual change to the asethetics.  Expensive, but a lovely job which may even last loner than the existing windows.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

June 11th, 2018 | BSBM / AECB | jimmiller

It’s BSBM tomorrow, Tuesday 12th from 7pm at the Battle of Trafalgar, 34 Guildford Road, BN1 3LW.  Please do bring your ideas, drawings and projects along for an informal discussion!  Everyone very welcome.  Details

May 09th, 2018 | BSBM / AECB | jimmiller

The June BSBM is Tuesday 12th from 7pm at the Battle of Trafalgar, 34 Guildford Road, BN1 3LW.  Please do bring your ideas, drawings and projects along for an informal discussion!  Everyone very welcome.  Details

April 23rd, 2018 | Greycot new build | jimmiller

Martin’s done a lovely job on his Hemcrete outbuilding (now clad in chestnut shingles) as a proof of concept for his new house for which the excavations have been completed.  There’s a fantastic view from his outdoor bathtub while he’s ‘camping out’ during the build!

April 09th, 2018 | BSBM / AECB | jimmiller

It’s BSBM tomorrow, Tuesday 10th April from 7pm at the Battle of Trafalgar, 34 Guildford Road, BN1 3LW.  Please do bring your ideas, drawings and projects along for an informal discussion!  Everyone very welcome.  Details

March 28th, 2018 | Greycot new build | jimmiller

If anyone would like to see Hempcrete in action, a colleague has built an outbuilding (as a trial run for a house) on the outskirts of Brighton.  Please call Martin on 07890 724634.

March 16th, 2018 | Uncategorized | jimmiller

My favourite builders go that extra mile to gain access!

March 14th, 2018 | BSBM / AECB | jimmiller

The April BSBM is Tuesday 10th from 7pm at the Battle of Trafalgar, 34 Guildford Road, BN1 3LW.  Please do bring your ideas, drawings and projects along for an informal discussion!  Everyone very welcome.  Details

March 13th, 2018 | BSBM / AECB | jimmiller

It’s BSBM tonight, Tuesday 13th March from 7pm at the Battle of Trafalgar, 34 Guildford Road, BN1 3LW.  Please do bring your ideas, drawings and projects along for an informal discussion!  Everyone very welcome.  Details

March 03rd, 2018 | 'EnerPHit', Passivhaus | jimmiller

So in the end we renovated the entire house from top to bottom, added a loft with en-suite, moved the bathroom and opened up the lower ground floor.  This added a bedroom (now 4), an en-suite and a second reception room which has transformed the house.  Internal floor area has only increased by the loft area from around 90m2 to a still modest 110m2.  Photos will be available once the decorating is completed later in the year and I’ll be blogging on lots of issues as I find time.

Remedial works, i.e. replumbing, rewiring, replastering, redecorating and strengthening etc i.e. effectively making good a building which had been badly built in ~ 1895 and unloved for many decades, cost around £90k.  The loft (including replacing the entire first floor ceiling and chopping the chimney stack in half) and opening up the lower ground floor cost around £65k.  Sustainable measures, i.e. beyond traditional building techniques to Building Regulations standards such as additional insulation, excellent airtightness, cold bridging reduction and the MVHR ventilation system cost perhaps £30k.  The nice to haves, i.e. good quality fittings another £30k, so the total works cost £210k.  As I do this for my day job, I provided the complete architectural services and this would have cost around £40k, and needs to be included, so the real cost is £250k.  (From my experience professional fees for deep retrofit can be as high as 20% if you really want to get the design and build right).  This is a staggering sum of money and raises lots of questions.  I will address the issue of added value once the house is fully decorated and we have estate agent valuations but it is clear that we cannot hope to recoup anywhere near this amount by the increase in the value of the property.  There are some follow-on savings such as (hopefully) negligible maintenance costs for decades to come which offset this amount to some extent.

Is it morally reasonable to spend such a huge sum?  Arguably, someone had to renovate the house at some point and the loft and internal re-configuration have made the house much more useable and the build costs are determined by the UK construction industry.  I find it difficult to justify spending £30k on nice to have’s but quality is a pleasure to use and the bits that wear and brake will be more robust and durable so last longer which is one of the main ways to be sustainable.

We spent £26k a few years back renovating the rear and we still need another £30k to renovate the front (internally insulate and add secondary glazing) so the final bill will be around £300k!  This will mean an average renovation cost of ~ £2,700 per m2 which is the same as high end new build!

What does it say about deep retrofit?  The deep retrofit element (i.e. works beyond simply meeting building regulations and the implicit poor construction performance) might end up being perhaps £60k depending on where you draw the line.  From a purely energy point of view, the deep retrofit might result in energy savings between £500 – £1,000 annually.  Some of fundamental interventions may last the lifetime of the building i.e. 60 – 100 years, others such as the plant and fenestration between 10 – 30 years so the lifetime energy savings could range from perhaps £500 for 30 years to £1000 for 60 years i.e. anywhere between £15k and £60k (but this needs a much deeper analysis to be anything more than a rough indication)

However, the house has been transformed by the deep retrofit element which has delivered comfort – which has improved beyond all recognition, especially the loft which is effectively Passivhaus performance (which I’ll address another time).  The simple energy cost saving calculation misses these more subtle benefits.  What’s the value of improved air quality, better acoustics both externally and within the house, better and longer sleep, less family arguments, improved health!?!  Subjects for future blogs.

February 28th, 2018 | Passivhaus, PassivOFFICE case study | jimmiller
Just had an email from my client at the PassivOFFICE:
‘Just thought you might like to know that on the coldest morning for 4 years (maybe longer), I am working in the garden office in a T-shirt, with no heating on!’
February 16th, 2018 | Hove Passivhaus, Passivhaus | jimmiller

The boiler went off by accident in January (so the building was unheated) but being so well insulated nobody noticed for 3 days!  That’s what you get from a Passivhaus – surely how all new building should function in the 21st century?

February 16th, 2018 | Hove Passivhaus, Passivhaus | jimmiller

The internal fit out is nearing completion, moving on to the driveway next month.  The external solar roller blinds still allow a fair amount of visible light through as can be seen in the third image (where the top window is protected but the lower window is not).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

February 16th, 2018 | BSBM / AECB | jimmiller

The March BSBM is Tuesday 13th from 7pm at the Battle of Trafalgar, 34 Guildford Road, BN1 3LW.  Please do bring your ideas, drawings and projects along for an informal discussion!  Everyone very welcome.  Details

February 09th, 2018 | BSBM / AECB | jimmiller

It’s BSBM this coming Tuesday 13th February from 7pm at the Battle of Trafalgar, 34 Guildford Road, BN1 3LW.  Please do bring your ideas, drawings and projects along for an informal discussion!  Everyone very welcome.  Details

January 10th, 2018 | BSBM / AECB | jimmiller

Good meeting last night with no fewer than 4 people bringing in drawings of projects for discussion!  Next meeting Tuesday 13 February from 7pm at the Battle of Trafalgar, 34 Guildford Road, BN1 3LW.  Please do bring your ideas, drawings and projects along for an informal discussion!  Everyone very welcome.  Details

January 08th, 2018 | BSBM / AECB | jimmiller

It’s BSBM tomorrow night, Tuesday 9th January from 7pm at the Battle of Trafalgar, 34 Guildford Road, BN1 3LW.  Please do bring your ideas, drawings and projects along for an informal discussion!  Everyone very welcome.  Details

December 13th, 2017 | 'EnerPHit', Materials | jimmiller

Free to the collector:

December 13th, 2017 | BSBM / AECB | jimmiller

The January BSBM is Tuesday 9th from 7pm at the Battle of Trafalgar, 34 Guildford Road, BN1 3LW.  Please do bring your ideas, drawings and projects along for an informal discussion!  Everyone very welcome.  Details

December 10th, 2017 | BSBM / AECB | jimmiller

It’s BSBM this Tuesday 12th December from 7pm at the Battle of Trafalgar, 34 Guildford Road, BN1 3LW.  Please do bring your ideas, drawings and projects along for an informal discussion!  Everyone very welcome.  Details

November 15th, 2017 | BSBM / AECB | jimmiller

The December BSBM is Tuesday 12th from 7pm at the Battle of Trafalgar, 34 Guildford Road, BN1 3LW.  Please do bring your ideas, drawings and projects along for an informal discussion!  Everyone very welcome.  Details

November 14th, 2017 | BSBM / AECB | jimmiller

It’s BSBM tonight, Tuesday 14th November from 7pm at the Battle of Trafalgar, 34 Guildford Road, BN1 3LW.  Please do bring your ideas, drawings and projects along for an informal discussion!  Everyone very welcome.  Details

November 01st, 2017 | Hove Passivhaus | jimmiller

Been a while but the project nears completion with a classic pre-christmas move in date, ‘ready or not’!  Intermediate air test result of 0.6 ACH means the house is likely to be a non-certified Passivhaus.

 

 

 

October 26th, 2017 | 'EnerPHit', For Sale, Materials | jimmiller

Coming to the end of the works and there’s a few leftover specialist building materials.  Free (or a bottle of something perhaps) to anyone collecting soon.  There’s woodfibre boards, TR27 PIR insulation, Solitex, Intello, bitumen flat roofing membrane and even some Spacetherm.   Also Foamglas and a single room heat recovery extractor from Environvent

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October 25th, 2017 | BSBM / AECB | jimmiller

The November BSBM is Tuesday 14th from 7pm at the Battle of Trafalgar, 34 Guildford Road, BN1 3LW.  Please do bring your ideas, drawings and projects along for an informal discussion!  Everyone very welcome.  Details

October 09th, 2017 | BSBM / AECB | jimmiller

Just a reminder that it’s BSBM tomorrow evening, Tuesday 10th October from 7pm at the Battle of Trafalgar, 34 Guildford Road, BN1 3LW.  Please do bring your ideas, drawings and projects along for an informal discussion!  Everyone very welcome.  Details

September 27th, 2017 | Materials | jimmiller

Apologies, never got back to you with the results of the Proclima Tescon VANA repair to my surfboard… used the board twice in heavy swells and the tape didn’t seem to notice!  The tape looked exactly the same afterwards (which I was expecting) but it’s always good to check out manufacturers claims!

September 20th, 2017 | For Sale | jimmiller

Last chance to make me an offer on my Internorm HV350 tilt and turn window (528 x 2007mm) and a set of french doors (1684 x 1980mm) fitted to my loft conversion but being swapped out w/c 2 October due to minor defects.  The specification is top end: aluminium clad larch, triple glazed with solar powered integral blind behind a 4th pane of glass (to control overheating) and U values ~ 0.85.  External colour is light grey.  Both are fully functioning but one door is slighty warped and there is some minor cosmetic damage.  Any reasonable offer accepted.   Collection from Hove / Brighton in early October.  Download the paperwork

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September 13th, 2017 | BSBM / AECB | jimmiller

The October BSBM is Tuesday 10th from 7pm at the Battle of Trafalgar, 34 Guildford Road, BN1 3LW.  Please do bring your ideas, drawings and projects along for an informal discussion!  Everyone very welcome.  Details

September 07th, 2017 | Materials | jimmiller

Can Proclima’s very effective and useful Tescon VANA tape hold an ageing suf board together in the sea?  I’ll report back after the weekend!

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August 29th, 2017 | BSBM / AECB | jimmiller

The September BSBM is Tuesday 12th from 7pm at the Battle of Trafalgar, 34 Guildford Road, BN1 3LW.  Please do bring your ideas, drawings and projects along for an informal discussion!  Everyone very welcome.  Details

August 18th, 2017 | For Sale | jimmiller

I have installed an Internorm HV350 tilt and turn window (528 x 2007mm) and a set of french doors (1684 x 1980mm) to my loft conversion but due to minor defects these are being completely swapped out by Internorm.   The specification is top end: aluminium clad larch, triple glazed with solar powered integral blind behind a 4th pane of glass (to control overheating) and U values ~ 0.85.  External colour is light grey.  Both are fully functioning but one door is slighty warped and there is some minor cosmetic damage.  Any reasonable offer accepted.   Collection from Hove / Brighton in early October.  Download the paperwork

August 07th, 2017 | BSBM / AECB | jimmiller

Just a reminder that it’s BSBM tomorrow evening, Tuesday 8th August from 7pm at the Battle of Trafalgar, 34 Guildford Road, BN1 3LW.  Please do bring your ideas, drawings and projects along for an informal discussion!  Everyone very welcome.  Details

July 31st, 2017 | BSBM / AECB, Events | jimmiller

The August BSBM is Tuesday 8th from 7pm at the Battle of Trafalgar, 34 Guildford Road, BN1 3LW.  Please do bring your ideas, drawings and projects along for an informal discussion!  Everyone very welcome.  Details

July 19th, 2017 | Airtightness, Passivhaus, Project 117 | jimmiller

Fantastic news today, the rebuild of a Victorian cottage in Brighton has achieved an airtightness of 0.35 ACH so way below EnerPhit and acheiveing full Passivhaus performance.  The homeowner has toiled on the project for 5 years and the result of a lot of hard work and dedication has paid off.