Condensation in Blandford Forum: thermal movement
Thermal movement and expansion in Blandford Forum 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 and expansion in Blandford Forum 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.
Condensation Blandford Forum: 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.
Condensation Blandford Forum: thermal movement
Because expansion is temperature-driven. A seasonal pattern points at movement and clearance rather than at wear, and the remedy is different.
thermal movement decision path for Condensation in Blandford Forum
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.
Condensation Blandford Forum: thermal movement
- Condensation in Blandford Forum: Why is the fault worse at certain times of year? — what matters for Georgian market-town terraces?
- 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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