radical simplicity in passivhaus timber building

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Nick Grant Elementalsolutions.co.uk @ecominimalnick Radical simplicity; How to achieve high performance timber building, affordably: Woodbuild Wales 2017 Photo Juraj Mikurcik

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Page 1: Radical simplicity in Passivhaus Timber Building

NickGrantElementalsolutions.co.uk

@ecominimalnick

Radicalsimplicity;Howtoachievehighperformancetimberbuilding,affordably:Woodbuild Wales2017

PhotoJuraj Mikurcik

Page 2: Radical simplicity in Passivhaus Timber Building

Aspirationalsustainabilityisanoxymoron

“I’dlovetodesignanEco-House*butwehaven’thadtherightclient”*Insertenvironmentaltargetofchoice.

Page 3: Radical simplicity in Passivhaus Timber Building

Sustainablebuildingsforthemanynotthefew

Manifesto

Page 4: Radical simplicity in Passivhaus Timber Building

ValueEngineeringIstheAnswer!But>90%ofArchitectsthinkisisabadthing

Animageproblem:

Page 5: Radical simplicity in Passivhaus Timber Building

Value= FunctionCost

Natureisallaboutvalue

Image;tes.com

Eventhepeacockisoptimisedbyconstraints

Page 6: Radical simplicity in Passivhaus Timber Building

ValueEngineering CostCutting

VEvs.Costcutting

NickGrant,www.elementalsolutions.co.uk

Page 7: Radical simplicity in Passivhaus Timber Building

ValueEngineering CostCutting

NickGrant,www.elementalsolutions.co.uk

DaisyStone;Flickr

VEvs.Costcutting

Page 8: Radical simplicity in Passivhaus Timber Building

Example:Airtightness

MoreimportantthanthickinsulationItisagoodthing– trustme!

• Comfort– nodrafts• Airquality– crucialforgoodventilation!• Durabilityofbuild(interstitialcondensationrisk)• Measurabletestofbuildquality

• (Alsosavesenergy)

Page 9: Radical simplicity in Passivhaus Timber Building

Airtightnesscanbedifficult

(Verytidywork,don’tblamethebuilderforthecostorfinalresult)

FromTwitter

Useasmallchildtodothisbit

Page 10: Radical simplicity in Passivhaus Timber Building

Orsimple

Welikerobustboardbasedairbarriers

stripofmembrane

wallstopsshortuntiltapingcompleteorusestripofmembrane

FirsttimePassivhausBuilder,n50 =0.1airchanges/hourfirsttest

Nostructuralpenetrations

Page 11: Radical simplicity in Passivhaus Timber Building

Mike Whitfield super-insulated traditional cruck frame extension

NickGrant,www.elementalsolutions.co.uk

ThislookstrickybutisactuallyOK!(structureinside)

Page 12: Radical simplicity in Passivhaus Timber Building

AlsoontheoutsideWeathertightness…

Veryfiddly,lotsoftape,notrobust Wind&watertight&cheapertobuild.Samedetailusedforun-insulatedgarage.

NickGrant,www.elementalsolutions.co.uk

Page 13: Radical simplicity in Passivhaus Timber Building

Airtightnessisgoodvalueifdesignedin

n500.2isthenew0.6

(Builder’sresponsetobeingtoldthathehasachieved0.6airchanges.Hegot0.16onpreviousjob!)

Likeridingabike

Page 14: Radical simplicity in Passivhaus Timber Building

ManyWayse.g.Wrapa2x4standardhouse,robustandsimplesteps.

slab EPS

EPS

4x2frameisservicevoid(insulated)

airbarrier

LarsenTruss

Page 15: Radical simplicity in Passivhaus Timber Building

ArchitectAdrianCook

TyCasimCrickhowel

n50=0.18airchanges

Page 16: Radical simplicity in Passivhaus Timber Building

RadicalapproachIstudsteeteringonfloatingslabedge!

slab EPS

EPS

Genuinelyminimal

servicevoid

airbarrier

Istuds

Page 17: Radical simplicity in Passivhaus Timber Building

As light as aballoon(frame)

Page 18: Radical simplicity in Passivhaus Timber Building

Detailshaveevolvedoveranumberofprojects

lessfiddlybits!

Page 19: Radical simplicity in Passivhaus Timber Building

NickGrant,CharlesGrylls &MikeWhitfield

Designforeasyon-sitebuildFlexiblewindowlocation

Page 20: Radical simplicity in Passivhaus Timber Building

Structural slab

Lod

Thermalmodellingonlyworthdoingifdetailswillberepeated.Economyofscale.

©ElementalSolutions

NickGrant,www.elementalsolutions.co.uk

Page 21: Radical simplicity in Passivhaus Timber Building

Fixedwindows30%cheaper– thelargerwindowsarefixed.Nomullions

nofluenow!

NickGrant,www.elementalsolutions.co.uk

SlateCottage

Bump-outsoutsidethethermalenvelope

CheapcorrugatedAluzincroof

n50=0.26airchanges

Page 22: Radical simplicity in Passivhaus Timber Building

Designedfromtheinsideout.Windowsize,shapeandpositiondrivenbyfunction– includingframedviewswithprivacywhilstinbed

Page 23: Radical simplicity in Passivhaus Timber Building

TyPren Self-BuildBlaenfossArchitectDempseyDecourcy

Page 24: Radical simplicity in Passivhaus Timber Building

TyPren Self-BuildBlaenfoss

DaybeforestormDoris!

Page 25: Radical simplicity in Passivhaus Timber Building

TyPren Self-BuildBlaenfoss

TyPren Self-BuildBlaenfoss

Page 26: Radical simplicity in Passivhaus Timber Building

TyPren Self-BuildBlaenfoss

Windowsinstalledbehindthewrapinthedry

Page 27: Radical simplicity in Passivhaus Timber Building

TyPren Self-BuildBlaenfoss

Page 28: Radical simplicity in Passivhaus Timber Building

Firsttimeusingtapesn50=0.1airchanges!(0.09m/h– newUKrecord?)

TyPren Self-BuildBlaenfoss

Page 29: Radical simplicity in Passivhaus Timber Building

Self-builderDaiwithAdamandcamerashyDad,JimofWoodandGlass.

“it’saneasywaytobuildahouse”

Page 30: Radical simplicity in Passivhaus Timber Building

MoreinfoHowtoBuildaPassivhaus;Freetodownload:PassivhausTrust.org

Otherdownloadsandinfo:ElementalSolutions.co.uk

Thanks

@ecominimalnick