Moss growth on St Thomas’s roofs reflects the suburb’s tree canopy, valley humidity and Victorian roof surface types. We carry out low-pressure biocide treatment — never pressure washing — with a written post-treatment condition survey on every St Thomas property. Free quote. Call 01392 759 295.
St Thomas’s riverside position and the shade created by mature trees along the suburb’s residential streets create some of the fastest moss re-establishment rates in our coverage area. North-facing rear slopes on St Thomas Victorian properties can develop significant new moss coverage within 18–24 months of treatment in the most shaded positions. We reflect this in our maintenance recommendations for EX4: a 2–3 year treatment cycle rather than the standard 3–5 year cycle for more exposed properties.
The heritage tile surfaces on St Thomas’s Victorian stock require careful biocide selection. We use a pH-neutral, non-staining biocide formulation on all period St Thomas properties to avoid the surface marking that alkaline biocides can cause on original weathered clay tile glaze. This is confirmed by a test application on an inconspicuous slope before treating the full roof.
Most St Thomas properties benefit from treatment every 2–4 years, with annual inspection in the intervening period. The post-treatment condition survey at each visit builds a maintenance history for the property that informs future decisions. We offer scheduled annual inspection programmes for St Thomas homeowners who want consistent roof condition monitoring. Call 01392 759 295 for details.
Free survey and quote — no call-out fee, no obligation.
📞 Call 01392 759 295“Low-pressure biocide on our St Thomas slate roof. Condition survey identified a secondary issue. Good thorough service.”
“Treatment on our Victorian terrace in St Thomas. Heritage-appropriate method. Annual programme now set up.”
“North slope had been treated before with pressure washing. They explained why it kept coming back. Biocide approach has lasted much longer.”
From £200 for a smaller property to £500+ for a larger detached. Includes condition survey. Call 01392 759 295.
Every 2–4 years for most St Thomas properties. Heavily shaded slopes may need treatment every 2 years.
No — pressure washing damages tile surfaces and accelerates re-establishment. Low-pressure biocide treatment is the correct method.
Tree canopy shade, Devon’s above-average rainfall and the textured surface of concrete tile or slate provide ideal moss conditions. Treatment every 2–4 years is the correct management approach.
Yes, progressively. Moss holds moisture against tile surfaces, accelerates nail corrosion and can lift tiles. Treatment is cheaper than the repairs it prevents.
A residual biocide with minimum 6-month kill activity, applied at low pressure. pH-neutral formulation on heritage surfaces. Never alkaline products on original tile glaze.
Yes — every treatment visit includes a written condition survey identifying any secondary issues found during access.
No call-out fee. No obligation. Local Exeter roofers who turn up when they say they will.
01392 759 295