Ridge tile replacement: mortar bedding vs dry-fix ridge
Ridge tiles cap the apex of your roof. When the mortar bedding fails — which it will on every traditional roof eventually — they crack, lift in wind and let water track down inside the loft.
Why mortar-bedded ridges fail
Mortar is rigid; roof timbers move. Over 30–60 years the mortar cracks, water gets in, frost expands the cracks and the bond fails. On most pre-2000 roofs across Hampton, Hampton Hill, Twickenham and Teddington, the original mortar is now well past its design life.
Dry-fix ridge — the modern alternative
Dry-fix systems use a mechanically fixed ridge batten with a sealed flexible roll under each tile. No mortar, no cracking, no re-bedding ever needed. Building regs have effectively made dry-fix the standard for any new roof since 2015. We recommend converting on most re-ridge jobs unless the property is in a strict conservation area that prefers mortar.
Re-bedding vs full re-ridge conversion
If only a few ridge tiles are loose, re-bedding the affected section is cheaper. If the whole ridge line is cracked or moving, a full strip-and-dry-fix conversion is better value over 10+ years — with the chosen system documented in writing.
Hip tiles count too
Same logic applies to hip tiles on hipped roofs — common on Edwardian semis in East Sheen, Twickenham and Richmond. We dry-fix hips on the same visit when scaffolding is already up.
FAQs
Service life depends on the installed system, exposure and maintenance. There is no mortar to fail, and the fixings are stainless or galvanised throughout.
Most do — the visible finish is identical because the ridge tiles themselves are unchanged. We'll check the specific street before quoting if your property is conservation-area listed.
A typical 8–12m ridge conversion is a 1-day job once scaffolding is up. Full re-ridge with new tiles takes a second day for the bedding-tile sourcing and finishing.
Related reading
More on roof repairs and the jobs that usually come with it.
- Roof battens and nail fatigue: the hidden clock in every old roofRepairs & problems
- Can render be removed? Render removal and repair explainedRepairs & problems
- Roof moss removal: when it matters and when it doesn't
- Roof repair costs: what drives the price up or downCosts & budgeting
Looking for something specific? See our roofing services, cost guides, common roof problems or the areas we cover.
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