The works

External works, ground levels, surface drainage

Moisture-related maintenance work

✓

Re-pointing of mortar joints

✓

Re-rendering or plastering of walls

✓

Internal wall insulation

✓

External wall insulation

Cavity wall insulation

Fit flue damper or flue balloon

✓

Block flues

Window maintenance

✓

Secondary glazing

Retrofit double glazing to external windows

Windows & external door replacement

Draughtproofing

✓

High level of airtightness

Internal redecoration

✓

Insulation of suspended timber ground floor

✓

Replacement insulated solid concrete floor

✓

Maintenance work to roof and drainage

✓

Roof insulation on flat ceiling

✓

Roof insulation on pitched ceiling

Re-plumbing

✓

New room heaters

Heating system replacement

✓

Heating controls upgrade

✓

Domestic hot water storage upgrade

✓

Solar hot water

Re-wiring

✓

Change to 100% low energy lighting

✓

Standalone extract ventilation

Whole house demand control mechanical extract ventilation

Mechanical ventilation with heat recovery

Insulation of timber floors

The existing ground floor suspended timber floor was insulated with 175mm compressed fibre insulation in netting installed from above by temporary removal of the original floorboards as part of a general reconditioning of the floor.

None

All original fabric was retained and floorboards were carefully removed

Insulation of solid floors

The solid ground floors to the rear returns were replaced and insulated with 100mm of rigid PIR board and perimeter edge insulation

Low

Existing solid floors were not significant

Wall insulation

The rear return was insulated with 50mm calcium silicate board where no period wall features existed.

Low

No wall or window features existed in the return

Attic Insulation

The roof attic spaces were insulated with 300mm fibre insulation to current standards.

None

All original roof fabric was retained

Sash window draughtproofing & repair

The existing sash windows were repaired and draughtproofed with a proprietary brush system. (Two of the original sets of shutter and shutter surrounds were missing and were fabricated to the original detail and reinstated.)

Low

Windows were repaired and draughtproofed in situ

New casement windows

New timber framed 18mm double-glazed windows to replace casement units to rear returns were installed.

Low

Opes located to the rear return had been previously modified and no original window joinery existed

Heating system replacement

A seven-zone individual room gas-fired heating system was installed to allow programmable partial heating patterns to suit the owner’s occupancy of the house.

Low

Existing service routes were used insofar as possible

Draughtproofing chimneys

The existing fireplaces were refurbished as part of the works. Three of the four existing fireplaces not intended for use had register plates inserted to the base of the chimneys to eliminate draughts. Chimney pots were capped while allowing ventilation to the flues.

None

All fireplaces retained. Register plates are completely reversible

Rendering

The rear elevation of the houses was re-rendered with hydraulic lime render to ensure the solid walls could breathe.

Low

The lime rendering replaced modern cement render

Insulation of return walls with calcium silicate board

2.1 / 0.81

€14,100

Insulation of existing timber floors

0.44 / 0.27

€ 2,800

Replacement & insulation of solid floors

1.23 / 0.21

€2,600

Total cost of insulation measures to floor, roof & walls

N/A

€19,500

Conservation, repair & draughtproofing of existing sash windows

4.8

(no change)

€11,000

New double gazed hardwood windows to the returns

4.8 / 1.4

€6,500

New seven zone heating system, gas boiler, hot water cylinder

N/A

€22,500

Control system to heating

N/A

€3,000

Miscellaneous (works to fireplaces, existing front door)

N/A

€2,000