How to Tell You Need Roof Cleaning
Roof cleaning covers moss, algae and general soiling that build up on Ipswich roofs in the damp valley air. Done correctly it protects the tiles; done with a pressure washer it damages them — which is why method matters.
- Green or black algae staining across the tiles
- Thick moss holding water against the covering
- Debris and growth choking the valleys and gutters
- A north-facing or tree-shaded roof that stays damp and discoloured
- Porous-looking concrete tiles pitting under the growth
When it is not the answer: If the tiles have delaminated or failed under the growth, cleaning only delays the inevitable — the honest answer may be that the slope needs re-covering. Read the full guide.
The damp air of the Gipping valley and Ipswich's heavy tree cover mean roofs here soil and grow moss and algae faster than in drier, more open towns. North-facing slopes and the shaded roofs under the canopy on the leafier roads stay damp and discoloured, and on porous concrete tiles the growth pits and degrades the surface over time. The right approach protects the tiles: a soft-wash and hand-scrape to lift the growth, followed by a biocide to slow its return — never a pressure washer, which forces water under the tiles and strips the weathered surface that protects them. Because the shade and damp that feed the growth don't go away, the most affected Ipswich roofs benefit from a periodic re-treatment rather than a one-off clean.
The right method protects the tiles rather than shortening their life. We soft-wash and hand-scrape the moss and algae off, then apply a biocide that carries on working to slow the regrowth — and we never use a pressure washer on a tiled roof, because the force drives water under the tiles and strips the weathered surface that protects concrete tiles from further decay. We clear the growth out of the valleys and gutters as part of the visit, since that is where it does the structural damage. And because the north-facing aspect and the damp Gipping valley air that feed the growth do not change, we are straight with you that the most shaded Ipswich roofs benefit from a periodic re-treatment rather than a single clean that simply grows back.
The roofs we are most often called to clean in Ipswich are the north-facing slopes and the shaded roofs under the tree canopy on the leafier roads, where the damp never really dries and the moss and algae take hold year after year. A clean on a typical semi is a day's work from a tower or roof ladders; a larger detached roof runs to two. We always pair the clean with clearing the valleys and gutters, because the growth we scrape off has usually been feeding straight into them. And we are honest at the survey about what a clean will and will not achieve — on a genuinely shaded roof it restores the appearance and protects the tiles, but the growth will return over the years, which is why a periodic re-treatment keeps it in check rather than a single clean that simply grows back.
The roofs we are most often called to clean in Ipswich are the north-facing slopes and the shaded roofs under the tree canopy on the leafier roads, where the damp never really dries and the moss and algae take hold year after year. A clean on a typical semi is a day's work from a tower or roof ladders; a larger detached roof runs to two. We always pair the clean with clearing the valleys and gutters, because the growth we scrape off has usually been feeding straight into them. And we are honest at the survey about what a clean will and will not achieve — on a genuinely shaded roof it restores the appearance and protects the tiles, but the growth will return over the years, which is why a periodic re-treatment keeps it in check rather than a single clean that simply grows back.
