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Heat pumps are changing how period homes are heated, but the plaster on the wall is often the last thing anyone considers. This practical guide looks at what lower flow temperatures do to lime and clay finishes, and how to spot when an old wall is being asked to cope with too much.
Walk into a UK builders’ merchant in 2026 and you’ll find no shortage of bags promising breathability. Some are excellent. Some are ordinary mortars with a green label. Here’s a practical way to ask better questions, read the datasheet and check the product on site before it goes onto a period wall.
Insulating a solid-wall UK home can cut bills, but it can also change how moisture moves through the building. Here is how lime and clay plasters fit into a breathable retrofit in 2026, and what to ask before the first coat goes on.