Stakeholders

Designer

SABA ARCHITECTES
contact@saba-architectes.com

Owner approach of sustainability

Environmental criteria were paramount in this project while ensuring visual, acoustic and olfactory comfort of the structure.

Architectural description

The program consists of two identical houses (four-rooms houses) with very good energy performance (Passivhaus).
Each house is composed of three separate volumes, the residential part is treated in traditional two sides slate roof and zinc deck roof in the same tonality for the saddler.
The main volumes, oriented east-west, shelters the living areas on two levels. The second volumes, more modest, are perpendicular to the first and shelter a room downstairs. The lowest volume is the cellar and its roof terrace create an awning which marks and protects the house entrance.
These two constructions are designed and constructed on a passive level. They respect the RT 2005 BBC Passivhaus standard with traditional construction techniques by increasing the insulation thickness. The energy consumption of heating, domestic hot water by thermodynamics balloon, dual-flow ventilation, auxiliary and home lighting is 31.0 kw hep/m2 (less than 42kwhep/m2 of Passivhaus label) and 6.35 kwh EF/m2 year (well less than 15 kwh EF/m2 year max of Passivhaus label).

Energy consumption

• Primary energy need : 31 kWhep/m².an
• Primary energy need for standard building : 42 kWhep/m².an

RT 2005

Envelope performance

• Envelope U-Value : 0 W.m^-2.K^-1
More information :

Interior walls - Agglos + LdV 75 + 75mm R = 5.77 - U = 0.14 W / m2.K
roof: Rampant - LdV 100mm R = 3.1 - U = 0.08 W / m2.K
Attic - LdV 100mm R=3.1 - U= 0,16 W/m2.K
ceiling - PUR 100mm R=4.3 - U= 0,11 W/m2.K
joineries: PVC Bay DV TFE + Argon with the closure - U= 1.30 W/m2.K PF en PVC DV TFE + Argon with the closure - U = 1.20 W / m2. K.F PVC DV TFE + Argon with closure - U = 1.20 W / m2.K FT wooden DV TFE + Argon without closure - U = 1.40 W / m2.K Insulated entrance door - U = 1.40 W / m2.K Floor low floor TP - Insulation 200mm R = 9.09 - U = 0.10 W / m2.K

Systems

Heating system :
• Low temperature gas boiler
• Wood boiler
Hot water system :
• Other hot water system
Cooling system :
• No cooling system
Ventilation system :
• Double flow heat exchanger
Renewable systems :
• Wood boiler

GHG emissions

• GHG in use : 2 KgCO₂/m²/an

Life Cycle Analysis

The houses are made entirely of wooden frame. They are over-insulated, which has the effect of avoiding the use of triple glazing. Wooden cladding is left natural for the two main volumes. A rendered masonry is used for cellars and for limits constructions, a rainwater recovery system equip them.

Product

Red Cedar
saliou menuiserie
ZA Balaneyer 22700 Saint Quay Perros - 02 96 49 05 40

Structural work / Structure - Masonry - Facade

Noble wood, the Red Cedar is a naturally durable without sapwood which takes a beautiful silvery gray color with age. Imported from Canada

This material is appreciated for its natural beauty and durability. Indeed, the red cedar is richly textured. The colors range from pale amber to ochre brown. It allows multiple domestic uses. Free of pitch and resins, it accepts all finishings (oils, dyes, coatings, paints). Thanks to its preservation oils, the cedar naturally resists to the moisture, rot and insects. It is also naturally anti-microbial and fungicidal. It has acoustic properties that prevent the transfer of sound vibrations and is soundproof.

Construction and exploitation costs

• Total cost of the building : 245 000 €

Urban environment

This construction project consists on two phases of two detached wooden houses, the parcel with a total area of 638 m² forms two private gardens. SABA performs two individual terraced houses on parcels of 300 m2 each. The land is flat. The site is in a rural landscape, hedgerows are bordering the field on Southwest and East. The surrounding field remain unchanged, only the access of the site will be relocated to fluidify the traffic.

Land plot area

665 m²

Building Environmental Quality