DESIGN PRINCIPLES


Introduction

 

The existing buildings were originally part of the Main Farm and latterly sold as separate units from the Farm. Planning consent exists for the main barn as residential use and the Piggery for use as holiday letting accommodation.

 

 

The site is situated to the north of Main Farm and to the west of a seperate barn previously converted to residential use. The site is only glimpsed from the main lane. 

 











Approach from the south;

 

Only the southern elevation of Barn C is visible from the public highway (Treliddon Lane)

 

 

 

 


Photograph 2

Approach from the South:

 

Little of Barn A is visible from the public highway (Treliddon Lane) and only  when at the  bend in road at Treliddon Farm

 

 

 

 

 

 

 

 

Photograph 3 Approach from the East:

From a short distance away the Barn A & C are not visible from the highway (Treliddon Lane).  Only when close to the gate of Treliddon Barn is There a partial view of East elevation of Barn A (see below)

 


 

Photograph 4 Approach to Barn from East (Treliddon Lane):

Part of Barn A visible

 

 

 


 

 

Photograph 5 View from  Trewall Hill:

Treliddon Farm is the prominent feature

 

 

 

 

Principles

 

The intention of the detail design is to conserve energy and seek to minimise the impact on the surroundings. The main element of this is to reduce the CO2 emissions and environmental impact of the building both during construction and the life span of property, and then introduce viable renewable strategies to the consumables for the building.

 

Design Overview

 

The layout and context of the buildings within the site are generally set by the existing consents to the site.

 

To address anomalies in the original approved elevations the entrance door and screen are now shown on the southern elevation, (whilst on the approved plans of the original drawings the elevations require clarification of detail).

 

The entrance door gives access to the lobby area. The solar gain to this area will be naturally convected to the habitable areas of the building. The exposed stone walling to the study and entrance lobby will act as a thermal store for the solar gain from the southern entrance screen and the west elevation glazing.

 


 

 

 

The southern glazed hip provides a contemporary aspect to the building and again allows for passive heat gain. The glazed screen and hip do not introduce overlooking to the south of the property, by virtue of the use of the lobby area and height of the hip, thus maintaining the privacy of the Farm buildings.

 

 

 

The solar panels to the southern slopes of both barns are to be flat plate rather that evacuated tube thus minimising the impact of these to the elevations in comparison to evacuated solar tubes fixed to the surface of the slates.

 

 

Photograph 6:

 

Flat plate solar panel set into roof slate is unobtrusive

 

 

 

 

 

 

 

 

 

Heating is to be provided by either ground source heat pump or biomass boiler and distributed via underfloor heating Solar panels will supplement the heating input of the boilers. The boiler plant will be centralised within Barn A to reduce CO2 compared with independent heating systems for both Barns. Heating to be supplemented in each property by wood burning stoves for spring and autumn use thus minimising the CO2 output of the buildings.

 

The building fabric will be “air sealed”, as far a reasonably practicable for an existing building, and heat recovery ventilation utilised to control heat loss and air distribution.

 

Stone on site will be reclaimed and utilised in the construction of the new walls to the barns and for the formation of the retaining walls. Additional stone will be sourced locally to supplement any short fall in quantities.

 

Details within the design will utilise the local vernacular and are based around the Caradon Design Guide of July 2000.

 

 

 

 

 

Environment

 

Rainwater harvesting will be utilised from the roofs of both barns and the surface water run off from landscaping, only the surplus to this will be discharged via pre existing drain runs from the site.

 

Foul water will be treated via a “bio disc” allowing any water to discharge safely to the land.

 

Incorporation of conservation roof lights above the kitchen, dining area, first storey bathroom and the north slope of the garage has been undertaken to provide natural light; this will reduce the need for artificial lighting therefore reducing CO2.


 

 

 

 

 

Photograph 7:

 

Conservation rooflights will be set into slate finishes

 

 

 

 

 

 

 

 

Provision for wildlife is to be made by the dedication of part of the land to a wildlife garden incorporating local fauna of the area and the maintenance of the existing traditional hedges.

 

Further to this an Owl box will be provided within the roof space of the garage.  This being detached from Barns A & C will be subject to less disturbance.

The Cornwall Enviromental Consultants Ltds report confirms that  there is no further evidence of bats to the barns, although does suggest provision for mitigation be incorporated as a bat has been previously recorded briefly at the property.  Within Barn A it is proposed to incorporate of Bat boxes in the form of Schwegler bat tubes, or similar, to the walls set behind the stone finishes to provide roosting sites around the property.

 


 

 

Schwegler bat tubes in situ

 

 

 

Environmentally friendly products will be utilised for timber treatment.

 

Appearance

 

Materials

 

Roof                                        Natural Slate

Walls                                       Local stone to match existing

Cills                                         Slate

Lintels                                     Mix of granite and timber as existing

Joinery                                    Timber windows and doors. Rooflights The Metal Rooflight Company or similar approved. Glazed hip.

Glazing                                   Doubled glazed units.

Rainwater goods                   Aluminium

Rainwater harvesting            Below ground

 

The positioning and detailing of satellite dishes, TV aerials and location of bin stores, meter boxes etc. to be positioned to minimise impact.

 

Windows and doors to be set back a minimum of  75mm from the face of the wall to create depth and shadow to the elevations.

 

 

 

 

Photograph 8 :

 

Style of window to maintain to vertical emphasis and set back from face of wall

 

 

 

 

 

 

 

 

 

 

 

 

 

Photograph 9;

 

Typical style of roof verge detail to be incorporated

 

Colour

 

The joinery to be coloured in pastel shades to match the local vernacular, harmonious with the adjacent materials.

 

Landscaping

 

Grounds to be landscaped to provide areas for growing food for own use, establishment of low level hedging and fruit trees to the boundaries. Provision of wildlife area.

 

 

Standards

 

To improve on the Building Regulations standards and utilise the Code for Sustainable Homes as the bench mark.

 

The existing external walls will be lined internally

New external walls to 0.25 U-Value

Floors to 0.18 U-Value

Roof to 0.17 U-Value

Windows to minimum of 1.8 U-Value

Ground source heat pump or bio mass boiler

Solar panels

Rainwater harvesting

Heat recovery ventilation

 

The buildings should achieve the Code’s Standards Level 3.

 

Access

 

The design principles and layout are for life long use of the buildings.

 

Barn C being single storey with level access thresholds and a level access shower within the bathroom enables the property to be available to mobility impaired and wheelchair users, the level garden further encourages this.

 

Barn A is designed with the potential for living (use of the study) and sleeping accommodation at ground storey level. The sloping nature of the site enables level access to be provided at first storey level. This level also having living and sleeping accommodation again maintains the versatility of accommodation for families as they mature.

 

On each storey the showers are provided as level access enabling ease of should for mobility impaired and wheelchair users. There is the potential for future provision of a platform lift to interconnect the two storeys with minimal impact/disruption to the fabric. Each of these features enables continued use of the property as the occupants age with out the need for extensive alteration to the fabric or for occupants to relocate.