Former forge at Tafarn-helyg is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 25 February 2005. Outbuilding.

Former forge at Tafarn-helyg

WRENN ID
deep-soffit-gilt
Grade
II
Local Planning Authority
Snowdonia National Park
Constituency
Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
Country
Wales
Date first listed
25 February 2005
Type
Outbuilding
Address
Former forge at Tafarn-helyg, Gellilydan, Maentwrog, Gwynedd
OS grid reference
SH 687 396
Coordinates
52.93825, -3.95457
Source
Cadw listing

Also on this page: flood risk · radon risk · weather exposure · detailed attributes ↓

Description

The former forge at Tafarn-helyg is a single-storey outbuilding that was originally used as a forge. It is constructed of rubble masonry, featuring large boulders, and has a slate roof with a stone gable stack on the southeast gable, complete with dripstones and capping. The main elevation faces the house to the southwest and includes a boarded stable door on the left and a two-light casement window on the right, along with a single window in the northwest gable.

The interior was not inspected during the survey conducted in June and July 2003, but the owner has stated that it retains its original forge fittings.

Local climate

Former forge at Tafarn-helyg sits in one of the wettest parts of the UK, with an average of 1,450 mm of rain a year. This makes it wetter than 98% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 96% of listed buildings.

It experiences an average of 36 freeze-thaw cycles a year, more than 60% of listed buildings. Of these, 18 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.

Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.

More on this building

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  • Detailed attributes — period, style, materials, features
  • Flood risk assessment
  • Radon risk assessment
  • Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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