Co Derry / Londonderry,
Northern Ireland


Completed 2014



Square Footage:


Kudos supplied and installed:

Timber Frame Core
Air Tightness

This house on the North Coast, not only has an enviable, uninterrupted view overlooking the Atlantic Sea, but the design demanded the versatile engineering of a steel and timber frame core

The Brief

Key features that were on the brief to the architect included:

  • Modern, light filled home designed to suit the couple’s desired use of space
  • Energy Efficient – adopting Passive House low energy principles
  • Use of sustainable materials and building practices where possible
  • Picture Windows
  • Easy to maintain
  • Future proofed to accommodate 2 maturing generations
Caslterock home inside
Castlerock interior
Caslterock outside
Castlerock interior
McGarry-Moon Architects
Castlerock House
Castlerock inside and out

We love this house in Castlerock which perfectly showcases the versatility of timber frame.


The architecture of the house with its big windows and desired efficiency standard, drove the construction method of the build. Its modern design with the multi-roof profile required a versatile engineering solution that only a composite steel and timber frame core could deliver.

Building core and fabric

The timber acts as a natural insulating partner and a crucial element in achieving the desired airtightness, particularly given the scale of the glazing. Embracing the sustainability ethos, the house was completed to a very high level of insulation.

In this case, the insulating materials comprise sheep’s wool, a high tech cellulose material, sealed with an insulating render.

Castlerock stairway

Achieving a low energy home

Efficient form, orientation and window shape are key components in achieving a low energy home. High levels of insulation as previously outlined, together with stringent air tightness measures are all critical to achieving a high performance, comfortable home.

Another vital component of a low energy, airtight, healthy, breathing home is ventilation. The installation of mechanical heat recovery system boosts air quality and comfort and completes the drive to attain optimum air tightness.


The house relies on natural solar gain from the expansive glazing throughout as its primary heating source.