Draughts in Plymouth: thermal movement
Thermal movement and expansion in Plymouth openings. Note when the problem is at its worst through the year — it genuinely narrows the diagnosis.
Note when the problem is at its worst through the year — it genuinely narrows the diagnosis.
Materials change length with temperature, and they do it at different rates. A dark-coloured length of profile in afternoon sun can be many degrees above the masonry it sits in, so the two move against each other every single day of the year.
thermal movement decision path for Draughts in Plymouth
Designers allow for this with expansion gaps, packers and flexible perimeter joints. Fill that allowance with rigid mortar or over-tight fixings and the movement has nowhere to go, so it appears as bowing, as a sash that binds in summer, or as a cracked joint line.
Thermal movement and expansion in Plymouth openings
Materials change length with temperature, and they do it at different rates. A dark-coloured length of profile in afternoon sun can be many degrees above the masonry it sits in, so the two move against each other every single day of the year.
Designers allow for this with expansion gaps, packers and flexible perimeter joints. Fill that allowance with rigid mortar or over-tight fixings and the movement has nowhere to go, so it appears as bowing, as a sash that binds in summer, or as a cracked joint line.
Diagnosis is often seasonal. A fault that appears in July and disappears in January is a movement problem; one that is constant year-round is usually wear or fixing failure instead.
Draughts Plymouth: thermal movement
Because expansion is temperature-driven. A seasonal pattern points at movement and clearance rather than at wear, and the remedy is different.
Draughts Plymouth: thermal movement
Diagnosis is often seasonal. A fault that appears in July and disappears in January is a movement problem; one that is constant year-round is usually wear or fixing failure instead.
Draughts Plymouth: thermal movement
- Draughts in Plymouth: Why is the fault worse at certain times of year? — what matters for 1950s post-war terraces in Devonport?
- Because expansion is temperature-driven. A seasonal pattern points at movement and clearance rather than at wear, and the remedy is different.
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