Bryn Mawr is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 5 April 1993. House.
Bryn Mawr
- WRENN ID
- former-barrel-mint
- Grade
- II
- Local Planning Authority
- Powys
- Constituency
- Montgomeryshire and Glyndwr MP: Steve Witherden (Lab)
- Country
- Wales
- Date first listed
- 5 April 1993
- Type
- House
- Address
- Bryn Mawr, Llandysilio
- OS grid reference
- SJ 251 188
- Coordinates
- 52.76236, -3.11036
- Source
- Cadw listing
Description
Bryn Mawr is a two-storey building with a single pile and adjoining rear wings that have separate roofs. The front and part of the west wing are constructed from rubble stone, with the front rendered, while the rest is made of painted brick. The building features slate roofs, brick detailing at the eaves, and flush stacks, including one with a brick upper on the front right gable and another on the east wing gable.
The front has two windows, with the ground floor windows featuring chambered heads. The windows are two-light metal casements hung on gudgeon pins, except for the lower left window, which is a wooden casement. The front door is part glazed and has four panels. The west wing includes a three-light chamfered mullion window with wooden shutters, which are now glazed, and a two-light chamfered mullion window on the first floor of the west wing that has been re-used.
Adjoining the east wing is a stone rubble lean-to with a tin roof and a gable stack, which serves as a bakehouse/washhouse that contains an oven and a copper. Inside, the original front portion retains two 17th-century main axial beams that are chamfered and have scroll stops, along with exposed joists. The wings feature narrow chamfered beams, and the east wing has beaded plank panelling on the lower half of the walls. Throughout the building, plank doors are hung on gudgeon pins.
Local climate
Bryn Mawr receives an average of 850 mm of rain a year. This makes it wetter than 58% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 66% of listed buildings.
It experiences an average of 41 freeze-thaw cycles a year, more than 78% of listed buildings. Of these, 22 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.
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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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