Rehabilitation of a stone house in Saint-Cast

Ca s o s tu d i o : Re h a b i l i ta ti o n o f a s to n e h o u s e i n S a i n t-Ca s t
S i to we b : h ttp ://www.co n s tr u cti o n 2 1 .o r g /i ta l i a /
Rehabilitation of a stone house in Saint-Cast
PUBBLICATO DA LEVENOK | 17 GIUGNO 16
Tipo lo gia di pro getto : Estensio ne +
Riqualificazio ne
Tipo di edificio : Ville a schiera
Anno di co struzio ne : 19 20
Zo na climatica : [Cfb] Marine Mild Winter,
warm summer, no dry seaso n.
Superficie utile calpestabile : 18 8 m 2
Co sto di co struzio ne/ristrutturazio ne : 50 0
000 €
Numero delle unità funzio nali : 1
Appartamenti
Co sti/m2 : 2 6 6 0 €/m 2
Co sti/Appartamenti : 50 0 0 0 0
€/Appartamenti
Rue du clo s co tillo n , 2238 0 Saint-Cast-leGuildo t, France
// Descrizione
This small sto ne ho use in Saint-Cast, built in 19 20 by the grandparents o f the Owner had never been reno vated. The Owner
wanted to o ffer his mo ther to return to this ho lidays place in co mfo rt.
Originally, o nly a reno vatio n o f the existing building was talked abo ut and the request extended to creating a veranda o pening
o nto the garden.
The build quality o f the o riginal ho use and its ideal o rientatio n (so uth) pushed us to pro po se a real investment fo r a
sustainable ho me, largely bio -based and eco no mical.
To day he even use the ho use fo r his o wn vacatio ns.
Maggio ri de t t agli sul pro ge t t o :
http://www.carabo x.co m/architecture/rehab_stCast.php (...)
At t e ndibilit à de i dat i :
Auto -dichiarazio ne
// Stakeholders
Rappresentante del committente
No me : Michel Leveno k
agence@carabo x.co m
Sito web : http://www.carabo x.co m/
Progettista
No me : Carabo x SARL
Virginie Leveno k ; agence@carabo x.co m
Sito web : http://www.carabo x.co m/
Impresa
No me : Chassé
Daniel Chassé
Sito web : http://www.maiso ns-bo is-chasse.co m/
Azio ne : frame / walls / insulatio n / flo o ring
Impresa
No me : FORPAC ETAO
Yo ann Taraud
Sito web : http://www.fo rpac.fr/
Azio ne : drilling / geo thermal
Impresa
No me : To utain
Mo nsieur To utain Yvo n à Plébo ulle
Azio ne : Maso nry / sto ne maso n / sto ne facing
Impresa
No me : Lemarchand
Jean-Michel Brigno n
Azio ne : slab / structure
Impresa di produzione
No me : Acthys
Stephan Lerner
Sito web : http://www.acthys-ventilatio n.fr/
Azio ne : natural humidity co ntro lled ventilatio n
T ipo lo gia co nt rat t uale :
Co ntraente generale
Appro ccio de l pro prie t ario alla so st e nibilit à e ne rge t ica : Enviro nmental co nsideratio ns were no t part o f the
requests o f the client, but mo st o f o ur pro po sals have fo und a listening ear.
Thus it has been appro ved to build wo o d, iso lating wo o l and wo o d fiber, to reco ver rainwater fo r watering and spreading to
tho se
were no t reco verable, revegetated the inaccessible part o f the terrace, installing a geo thermal system, etc.
The extensio n was o riginally designed as a separate space heating was passively pro vided by its so uth facing windo ws that
are
pro tected fro m the summer sun by the cap created by the ro o f deck.
The pro ject o wner has cho sen that this space is the extensio n witho ut thresho ld o f the o riginal ho use. If necessary, this space
can be heated o r co o led
the same flo o r heating system to geo thermal was cho sen fo r the rehabilitatio n o f the o riginal ho use.
Fo r the sake o f efficiency and simplificatio n, this ho use is a seco nd ho me, the idea o f
a so lar ho t water system was
abando ned, whereas the ro o f pitch was no t ideal and uno ccupied perio ds were likely to cause o verheating.
Fo r the same reaso ns, the humidity sensitive ventilatio n is but natural. We relied o n a clever use o f the premises, the windo ws
are o pen allo wing
natural flo w o f air bearing sea impairment o f natural ventilatio n in ho t weather.
De scrizio ne archit e t t o nica : The o riginal request o f the o wner was, besides the reno vatio n o f the ho use, adding a po rch
to the kitchen to enjo y the garden level ...
The idea o f veranda, we kept the essence: the wide o pening to the garden, as in the living ro o m created o n the gro und flo o r o n
the terrace accessible fro m the great ro o m o n the 1st flo o r which o ffers the lo o k no w turn to the sea.
Based o n a go lden rectangle, which also determines the po sitio n o f the do o rs, the space do ubles the surface o f the gro und
flo o r and o ffers a place o f receipt, while the o riginal ho use o nly co nceded small narro w ro o ms.
View o f the exterio r, the general line o f the extensio n is a reflectio n o f enviro nmental cho ices.
Co sa cam bie re st i se do ve ssi f arlo di nuo vo ? : Because it was initially decided to keep the o riginal walls and the
staircase, the plan o f the ho use was no t upset. The co nstructio n system partitio ns finally allo wed their remo val and the client
ultimately cho se to replace the stairs.
If it again, we certainly agencerio ns spaces differently in the o riginal ho use.
Opinio ni de gli ut ilizzat o ri de ll\'e dif icio :
Very go o d feedback o f o ccupants who asked us fo r ano ther realizatio n.
// Energia
Energy consumption
Fabbiso gno di e ne rgia prim aria : 11,46 kWh EP/m 2 /an
Fabbiso gno di e ne rgia prim aria de l m e de sim o e dif icio co st ruit o se co ndo gli st andard m inim i pre vist i dalla no rm at iva vige nt e :
48 ,30 kWh EP/m 2 /an
Me t o do di calco lo : RT 20 12
CEEB : 0 ,0 0 kWh PE / €
Maggio ri inf o rm azio ni : Because it is a seco nd ho me, the real co nsumptio n is no t representative. Fo r example, in
20 15: the o ccupancy rate is 2 mo nths o f summer.
Co nsum o iniziale prim a de ll\'inizio de i lavo ri :
50 5,0 0 kWh EP/m 2 /an
Performance dell'involucro
T rasm it t anza : 0 ,33 W.m -2 .K-1
Maggio ri inf o rm azio ni : In the rehabilitated part, there was no questio n o f lo sing the cachet o f the sto ne o f Saint Cast,
wall insulatio n has been carried o ut fro m the inside.The repair o f the co ver is pro vided, the ro o f insulatio n was perfo rmed
sarking, resulting fro m the fact raiser flues.In extensio n, the structure is wo o d and insulatio n level lo w co nsumptio n building
partly wedge between the structural elements.Co verage is largely a terrace available, the small inaccessible part is
vegetated.Laundry and unheated equipment ro o m were iso lated fro m the o utside.
Co e f f icie nt e di co m pat t e zza de ll\'e dif icio (f at t o re di f o rm a s/v) : 0 ,6 2
// Fonti Rinnovabili e Impianti
Systems
Im piant o di riscaldam e nt o :
Po mpa di calo re geo termica
Riscaldamento a pavimento a bassa temperatura
Wo o d bo iler
Im piant o di pro duzio ne di acqua calda sanit aria :
Po mpa di calo re
Im piant o di raf f re scam e nt o :
Po mpa di calo re geo termica
Im piant o di ve nt ilazio ne :
Ventilazio ne naturale
Sist e m i pe r lo sf rut t am e nt o di f o nt i di e ne rgia rinno vabili :
Caldaia a legna
Po mpa di calo re su so nde geo termiche
Heating, co o ling and ho t water are generated by a geo thermal system o n heated flo o rs.The idea o f a so lar ho t water system
was discussed but abando ned, whereas the ro o f pitch was no t ideal and that, in respect o f a seco ndary residence, vacancy
perio ds were likely to 'cause o verheating pro blems.
Natural ventilatio n and humidity co ntro lled (see do cument attached) with air fed thro ugh walls and extractio ns thro ugh the
attic. To o verco me a po ssible po wer failure summer ventilatio n, po wer lines were drawn at each air o utlet.
Geo thermal heat pumpPo wer = 8 6 40 W
COP = 4.59
So lut io ns e nhancing nat ure f re e gains : So uth o rientatio n o f the extensio n and main parts with a cap fo r summer
co mfo rt.
Smart Building
BMS :
Po wer switch fo r each main ro o m.
// Prestazioni ambientali
Life Cycle Analysis
Mat e riali e co -co m pat ibili : - wo o den structure
- wo o d wo o l
- Wo o d fiber
- Birch parquet / special o ak flo o r heating
- wo o den windo w
Water & Indoor air quality
RECOVERY OF RAIN WATER
The slo ping ro o f water reco very system used fo r watering the garden, rainwater fro m the terrace (no t reco verable under the
regulatio n) are rejected applicatio n.
Theo retical capacity: 27m3
WATER SUPPLY SYSTEM
The supply system was taken to its o rigin in ro ads and past Reticulated Po lyethylene until meter and co pper in ho using.
Qualit à de ll'aria int e rna : The ho use is lo cated in a sparsely develo ped area, the quality o f indo o r air is acquired by
natural ventilatio n and the use o f no n-to xic materials.
He alt h & co m f o rt : To limit the risks o f so lvents, paints and o ils used were VOC and fo rmaldehyde-free OSB, vitrified
flo o ring in the wo rksho p.
Aco ust ic co m f o rt : The ho use is lo cated in a very little urbanized area, aco ustic co mfo rt lies to hear o utside so unds
natural, so we intentio nally selected windo ws witho ut enhanced so und insulatio n.
Daylight f act o r : 2,6 po ur le séjo ur et 8 ,14 po ur l'extensio n
// Prodotti
Geothermal heat pump
Pro dut t o re : FORPAC ETAO
Co nt at t o : Yo ann Taraud
Sit o we b: http://www.fo rpac.fr/
Cat e go ria de l pro do t t o : HVAC / Riscaldamento , Acqua calda sanitaria
De scrizio ne :
heat pump co llect calo ries in depth in an area where the so il temperature varies little and
returning warmth o r co o lness by underflo o r heating (o r co o ling).
Co m m e nt i:
The cho ice o f a geo thermal system was actually an enviro nmental co mmitment by the pro ject
o wner because the return o n investment fo r ho using in Britanny mainly inhabited was no t granted. The idea do es no t suffer
fro m tariff increases fo r gas and tho se little electricity was to seduce the client.
http://www.co nstructio n21.o rg/italia/data/so urces/user (...)
Natural ventilation hygroadjustable
Pro dut t o re : Acthys
Co nt at t o : Stephan Lerner
Sit o we b: http://www.acthys-ventilatio n.fr/
Cat e go ria de l pro do t t o : HVAC / Ventilazio ne, Raffrescamento
De scrizio ne :
By a membrane system sensitive to ambient humidity, ventilatio n o pens o r clo ses. The draw is
then made by depressio n, naturally.The system o perates less in summer (especially if the
o utside temperature exceeds the indo o r temperature), an electrical assistance may be added
later.
Co m m e nt i:
This system wo uld avo id the installatio n o f a co mplex system o f Mechanical ventilatio n and needs no electricity.
http://www.co nstructio n21.o rg/italia/data/so urces/user (...)
Wood wool insulation
Pro dut t o re : Actis
Co nt at t o : http://www.actis-iso latio n.co m/co ntacts.php?p=1&l=1&rub=6 &vert=1
Sit o we b: http://www.actis-iso latio n.co m
Cat e go ria de l pro do t t o : Opere di finitura / Partizio ni, iso lamento
De scrizio ne :
Unlike ro ck wo o l, wo o d wo o l co mes fro m renewable material and do es no t require as many
energetic expenditure fo r the develo pment o f the material. This is an insulato r which has
advantages in summer co mfo rt and management o f hygro thermal co mfo rt.
Co m m e nt i:
Actis certainly wo uld no t have been my cho ice (o ther co mpanies are much mo re co mmitted to the enviro nment), but this
cho ice was delegated to the carpentry business
http://www.co nstructio n21.o rg/italia/data/so urces/user (...)
Wood structure
Pro dut t o re : CHASSÉ
Co nt at t o : Chassé Daniel
Sit o we b: http://www.maiso ns-bo is-chasse.co m/
Cat e go ria de l pro do t t o : Opere strutturali / Struttura - Invo lucro - Finitura
De scrizio ne :
Renewable materials, to limit the thickness o f the walls, the structure invo lved in the insulatio n,
a wo o d structure is naturally stable fire, did no t require co mplicated apparatus fo r its
implementatio n and will require little energy to its deco nstructio n.
Co m m e nt i:
The client had no a prio ri, it was easily co nquered.
Sarking
Pro dut t o re : STEICO
Co nt at t o : http://www.steico .co m/fr/service/demande-co ntact/
Sit o we b: http://www.steico .co m/fr/
Cat e go ria de l pro do t t o : Opere di finitura / Partizio ni, iso lamento
De scrizio ne :
The sarking o r insulating a ro o f fro m o utside fo r enjo ying the re-ro o fing to iso late o r impro ve
insulatio n, while maintaining the internal vo lume.Here, we cho se wo o d fiber fo r its stiffness and
its simplicity o f implementatio n.
Co m m e nt i:
The pro ject o wner has accepted witho ut questio n all o ur insulatio n pro po sitio ns ... but we were no t able to co nvince him o f the
futility o f a system refresh his memo ry warm her childho o d summers spent in the uninsulated ro o f slate was mo re po werful
than o ur demo nstratio ns.
Facing imitation St-cast stone
Pro dut t o re : ORSOL
Co nt at t o : Ricardo MACÉ
Sit o we b: http://www.o rso l.fr/pro duits/parements/causse
Cat e go ria de l pro do t t o : Opere strutturali / Struttura - Invo lucro - Finitura
De scrizio ne :
St Cast sto ne reco vered during the expansio n o f the so uth windo ws o r creating o penings to the
extensio n wo uld have been sufficient to achieve the facing thickness was no t as impo rtant in
cutting and facing elements o f a dispro po rtio nate blo w to the expected effect.Our cho ice was
therefo re po stpo ned o n a co ncrete surface appearance sto ne that mimics the o riginal sto ne.
Co m m e nt i:
Several aspects o f the extensio n were pro po sed to o wners who cho se this reminder o f the o riginal ho use in its extensio n.
http://www.co nstructio n21.o rg/italia/data/so urces/user (...)
// Costi
Co sto di co struzio ne/ristrutturazio ne : 50 0 0 0 0 €
Construction and exploitation costs
Co st o de i sist e m i pe r lo sf rut t am e nt o di f o nt i di e ne rgia rinno vabili :
Sussidi f inanziari : 0 €
18 515,0 0 €
// Qualità della pianificazione urbana
Am bie nt e urbano : Residential District away do wnto wn Saint-Cast.
Individual ho uses with garden and / o r vegetable garden o n a dirt driveway.
Supe rf icie t o t ale de ll\'are a di int e rve nt o :
Supe rf icie t o t ale de ll\'e dif icio :
Spazi ve rdi ad uso co m une :
Num e ro di parche ggi :
10 10 m 2
10 %
900
Car lo catio n o n duckbo ards to avo id crushing the gro und keeping a planted area with wo o den
pergo la fo r summer co mfo rt.
// Qualità ambientale dell'edificio
Qualit à am bie nt ale de ll\'e dif icio :
Qualità dell\'aria indo o r
Bio diversità
Cantiere (inclusa la gestio ne dei rifiuti)
Co nsultazio ne - Co o perazio ne
Acustica
Co mfo rt (visivo , o lfattivo , termico )
Gestio ne dei rifiuti (relativo all\'edificio )
Gestio ne delle acque
Efficienza energetica
Energia da fo nti rinno vabili
Integrazio ne ambientale
Pro cessi di co struzio ne
Pro do tti e materiali
// Concorsi
This refurbishment co uld co mpete in the "temperate climates and energy" catego ry as well as in the "lo w carbo n" because
we paid as much attentio n to reducing energy requirements as cho o sing bio -so urced so lutio ns.