Ty-isaf is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 21 July 1999. House.
Ty-isaf
- WRENN ID
- silent-render-bramble
- Grade
- II
- Local Planning Authority
- Gwynedd
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 21 July 1999
- Type
- House
- Address
- Ty-isaf, Garreg Fawr, Caernarfon, Waunfawr
- OS grid reference
- SH 536 581
- Coordinates
- 53.10056, -4.18779
- Source
- Cadw listing
Description
Ty-isaf is a single-storey building with an asymmetrical two-room plan, positioned roughly north-south on a slope. It features a cowhouse under a continuous roof line at the north (left) gable end. The exterior is made of roughly coursed rubblestone blocks set on a boulder plinth, with large quoins and lintels. The graded slate roof has been re-roofed with slate on the rear slope of the house.
The front of the building has an asymmetrical two-window arrangement with tall rectangular openings, which were formerly fitted with sash windows, flanking a roughly central boarded door that includes a glazed panel. A large ridge stack with slate drips is located to the left at the junction with the cowhouse. There is a small window opening in the upper part of the right gable end, along with two additional windows and a doorway on the back wall. The cowhouse features two doorways at the front, an opening in the gable end, and a window at the rear.
Inside, there is a stone cross-wall dividing the two rooms. The larger room on the left has boarded partitions and a massive inglenook fireplace with a chamfered timber lintel. The ceiling is boarded, revealing the bases of two A-frame trusses. The smaller room has plain joists supporting the floor of a croglofft, which also has a boarded ceiling. A rotted ladder is found on the floor of the main room. The cowhouse contains a central A-frame truss.
Local climate
Ty-isaf sits in one of the wettest parts of the UK, with an average of 1,380 mm of rain a year. This makes it wetter than 97% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 98% of listed buildings.
It experiences an average of 25 freeze-thaw cycles a year, fewer than 73% of listed buildings. Of these, 12 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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- No EPC on record for this property
- No sale records on file
- No related consent applications matched
- 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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