Rehabilitation of a stone house in Saint-Cast

Etu d e d e ca s : 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 te We b : h ttp ://www.co n s tr u cti o n 2 1 .o r g /m a r o c/
Rehabilitation of a stone house in Saint-Cast
PUBLIÉ PAR LEVENOK | 17 JUIN 16
Type de pro jet : Extensio n + réno vatio n
Type de bâtiment : Maiso n individuelle
iso lée o u jumelée
Année de co nstructio n : 19 20
Zo ne climatique : [Cfb] Océanique hiver
tempéré, été chaud, pas de saiso n sèche
Surface nette : 18 8 m 2
Co ût de co nstructio n : 50 0 0 0 0 €
No mbre d'unités fo nctio nnelles : 1
Lo gement
Co ût/m² : 2 6 6 0 €/m 2
Co ût/Lo gement : 50 0 0 0 0 €/Lo gement
Rue du clo s co tillo n , 2238 0 Saint-Cast-leGuildo t, France
// Description
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.
Plus de dé t ails sur ce pro je t :
http://www.carabo x.co m/architecture/rehab_stCast.php (...)
Fiabilit é de s do nné e s :
Auto -déclaratio n
// Intervenants
Maître d'ouvrage délégué
No m : Michel Leveno k
agence@carabo x.co m
Site Web : http://www.carabo x.co m/
Architecte
No m : Carabo x SARL
Virginie Leveno k ; agence@carabo x.co m
Site Web : http://www.carabo x.co m/
Entreprise
No m : Chassé
Daniel Chassé
Site Web : http://www.maiso ns-bo is-chasse.co m/
Actio n : frame / walls / insulatio n / flo o ring
Entreprise
No m : FORPAC ETAO
Yo ann Taraud
Site Web : http://www.fo rpac.fr/
Actio n : drilling / geo thermal
Entreprise
No m : To utain
Mo nsieur To utain Yvo n à Plébo ulle
Actio n : Maso nry / sto ne maso n / sto ne facing
Entreprise
No m : Lemarchand
Jean-Michel Brigno n
Actio n : slab / structure
Fabricant
No m : Acthys
Stephan Lerner
Site Web : http://www.acthys-ventilatio n.fr/
Actio n : natural humidity co ntro lled ventilatio n
Mo de co nt ract ue l :
Co ntractant général
Dé m arche dé ve lo ppe m e nt durable du m aît re d'o uvrage : 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 script io n archit e ct urale : 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.
Et si c'é t ait à re f aire ? : 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 n de s o ccupant s :
Very go o d feedback o f o ccupants who asked us fo r ano ther realizatio n.
// Energie
Consommation énergétique
Be so in e n é ne rgie prim aire :
11,46 kWh EP/m 2 /an
Be so in e n é ne rgie prim aire bât im e nt st andard : 48 ,30 kWh EP/m 2 /an
Mé t ho de de calcul :
CEEB : 0 ,0 0 kWh PE / €
Plus d'inf o rm at io n sur la co nso m m at io n ré e lle e t le s pe rf o rm ance s : 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 nso m m at io n init iale :
50 5,0 0 kWh EP/m 2 /an
Performance énergétique de l'enveloppe
UBat de l\'e nve lo ppe : 0 ,33 W.m -2 .K-1
Plus d'inf o rm at io n sur l'e nve lo ppe : 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 de co m pacit é du bât im e nt : 0 ,6 2
// EnR & systèmes
Systèmes
Chauf f age :
Po mpe à chaleur géo thermique
Plancher chauffant basse température
Wo o d bo iler
ECS :
Po mpe à chaleur
Raf raîchisse m e nt :
Po mpe à chaleur géo thermique
Ve nt ilat io n :
Ventilatio n naturelle
Ene rgie s re no uve lable s :
Chaudière-po ele bo is
PAC géo thermique sur so ndes
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 am é lio rant le s gains passif s e n é ne rgie : So uth o rientatio n o f the extensio n and main parts with a cap fo r
summer co mfo rt.
Bâtiment intelligent
GT C :
Po wer switch fo r each main ro o m.
// Environnement
Analyse du Cycle de Vie :
Eco -m at é riaux : - 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
Eau et qualité de l'air intérieur, santé et confort
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 é de l'air int é rie ur : 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.
Co nf o rt & sant é : 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.
Co nf o rt aco ust ique : 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.
Fact e ur lum iè re nat ure lle : 2,6 po ur le séjo ur et 8 ,14 po ur l'extensio n
// Produits
Geothermal heat pump
Fabricant : FORPAC ETAO
Co nt act f abricant : Yo ann Taraud
Sit e Int e rne t f abricant : http://www.fo rpac.fr/
Cat é go rie de pro duit : Génie climatique, électricité / Chauffage, eau chaude
De script io n:
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 aire s:
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/maro c/data/so urces/users (...)
Natural ventilation hygroadjustable
Fabricant : Acthys
Co nt act f abricant : Stephan Lerner
Sit e Int e rne t f abricant : http://www.acthys-ventilatio n.fr/
Cat é go rie de pro duit : Génie climatique, électricité / Ventilatio n, rafraîchissement
De script io n:
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 aire s:
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/maro c/data/so urces/users (...)
Wood wool insulation
Fabricant : Actis
Co nt act f abricant : http://www.actis-iso latio n.co m/co ntacts.php?p=1&l=1&rub=6 &vert=1
Sit e Int e rne t f abricant : http://www.actis-iso latio n.co m
Cat é go rie de pro duit : Seco nd œuvre / Clo iso ns, iso latio n
De script io n:
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 aire s:
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/maro c/data/so urces/users (...)
Wood structure
Fabricant : CHASSÉ
Co nt act f abricant : Chassé Daniel
Sit e Int e rne t f abricant : http://www.maiso ns-bo is-chasse.co m/
Cat é go rie de pro duit : Gro s œuvre / Structure, maço nnerie, façade
De script io n:
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 aire s:
The client had no a prio ri, it was easily co nquered.
Sarking
Fabricant : STEICO
Co nt act f abricant : http://www.steico .co m/fr/service/demande-co ntact/
Sit e Int e rne t f abricant : http://www.steico .co m/fr/
Cat é go rie de pro duit : Seco nd œuvre / Clo iso ns, iso latio n
De script io n:
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 aire s:
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
Fabricant : ORSOL
Co nt act f abricant : Ricardo MACÉ
Sit e Int e rne t f abricant : http://www.o rso l.fr/pro duits/parements/causse
Cat é go rie de pro duit : Gro s œuvre / Structure, maço nnerie, façade
De script io n:
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 aire s:
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/maro c/data/so urces/users (...)
// Coûts
Co ût de co nstructio n : 50 0 0 0 0 €
Coûts de construction & exploitation
Co ût de s syst è m e s d'é ne rgie s re no uve lable s :
Aide s f inanciè re s : 0 €
18 515,0 0 €
// Environnement urbain
Enviro nne m e nt urbain : Residential District away do wnto wn Saint-Cast.
Individual ho uses with garden and / o r vegetable garden o n a dirt driveway.
Surf ace du t e rrain :
10 10 m 2
Surf ace au so l co nst ruit e :
Espace s ve rt s co m m uns :
10 %
900
Parking : 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.
// Qualité environnementale du bâti
Qualit é e nviro nne m e nt ale du bât i :
Santé, qualité air intérieur
Bio diversité
Chantier (incluant déchets)
co ncertatio n - participatio n
aco ustique
co nfo rt (o lfactif, thermique, visuel)
gestio n des déchets
gestio n de l\'eau
efficacité énergétique, gestio n de l\'énergie
énergies reno uvelables
gestio n des espaces, intégratio n dans le site
pro cédés de co nstructio n
pro duits et matériaux de co nstructio n
// Concours
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.