Glanville Exterior Cleaning provides professional roof cleaning, moss removal and biocide treatment for premium properties across Berkshire, Buckinghamshire and Surrey. Low-pressure carbon pole method. Safe for all tile types. Fully insured. 40+ five-star reviews.
✓ No obligation · ✓ Written fixed-price quote · ✓ Biocide treatment included as standard
Most roof cleaning companies wash the moss off and leave. We remove it manually using a low-pressure carbon pole system — safe for every tile type, including clay, slate and reclaimed — and then apply professional DDAC biocide to kill the biological root cause of the growth. The result is a roof that stays clean for two to four years, not twelve months.
We work across Berkshire, Buckinghamshire and Surrey, covering premium residential properties from Ascot and Virginia Water to Windsor, Beaconsfield and the surrounding areas. Every job includes a free pre-works survey, before and after photography, a written treatment record and 12-month treatment support.
Read our guide to roof cleaning methods or our pricing guide for honest, detailed information before you book.
Our carbon pole system removes moss mechanically without high-pressure water. No mortar displacement. No cracked tiles. No water forced beneath the tile bed.
DDAC-based professional biocide on every clean. Kills the root structures that cause rapid regrowth. Not a domestic product — professional concentration applied correctly.
For larger and more complex roofs, we carry out aerial inspection before any work begins. Included as part of the free survey at no charge.
Before and after photography, written treatment record, COSHH data and homeowner aftercare guide as standard. Useful for property records, insurance and future sales.
Every service we provide is built around one principle: doing the job properly so the result lasts.
Low-pressure carbon pole cleaning for all tile types. Manual moss removal, controlled rinse, professional biocide treatment. The complete service, not just a wash.
Full service details →Specialist moss, lichen and algae removal using our carbon fibre pole system. Methodical, thorough, safe for all surfaces. Always followed by biocide treatment.
Moss removal details →Professional DDAC biocide application to inhibit moss and algae regrowth after cleaning. The step that turns a temporary clean into a 2–4 year result.
Biocide treatment guide →Full gutter and downpipe clearing with condition report. Recommended annually on most properties — essential before moss removal to ensure drainage is clear.
Gutter clearing details →Roof cleaning, exterior washing and maintenance programmes for hotels, schools, care homes and property management companies. Full RAMS and documentation.
Commercial services →Professional cleaning of driveways, patios, block paving and hard surfaces. Many clients combine this with a roof clean during the same visit.
Driveway cleaning →From a semi-detached in Beaconsfield to a large estate in Virginia Water — the process is identical. What changes is the time it takes, not the standard.
We assess your roof in person before quoting. Tile type, moss density, mortar condition, any structural concerns. Drone inspection where suitable.
All moss removed by hand using the carbon fibre pole system. Ridge to eave, every section. No high-pressure water on the tile surface.
Professional DDAC biocide applied to the full treated surface. Kills root structures, inhibits regrowth for 2–4 years. Not a domestic product.
Before and after photography, treatment record, COSHH data and aftercare guide issued on the day the work is completed.
Straightforward reasons, stated plainly.
Clay, slate, reclaimed, concrete — the low-pressure carbon pole method is safe for all of them. We confirm your tile type during the survey and adapt accordingly.
Not an optional extra. Every clean we carry out includes professional DDAC biocide treatment because cleaning without treating the root cause is a temporary fix.
Verified by Google. Real jobs on real properties. The recurring themes — thoroughness, honest communication, documented results — reflect how we work on every project.
We visit the property, assess the roof and provide a fixed written quote. No phone estimates. No day-of adjustments. The price we quote is the price you pay.
If any regrowth appears within 12 months of treatment, we return to assess and advise at no charge. A genuine commitment, not a marketing line.
Public liability insurance in place. Registered limited company. Clear terms of business. The standard we operate to reflects the properties we work on.
Add completed roof photo
Virginia Water after photo — WebPSignificant moss across multiple elevations on a large executive home in Virginia Water. Mature woodland setting, complex roof form, lichen on ridge tiles. Full carbon pole removal and DDAC biocide treatment. Roof restored to exceptional condition in one day.
Read the case studyAdd Ascot project photo
Complex multi-pitch roof with significant moss across all elevations. Mature trees on the plot, sound structure throughout. Roof restored to pristine condition.
Case studyAdd Windsor project photo
Significant moss and organic weathering across the full roof. Mature garden setting. Kerb appeal dramatically improved in a single day.
Case studyAdd Beaconsfield project photo
Both slopes carrying heavy moss. No structural issues found. Full clean and biocide treatment completed in one day. Homeowner said it looked brand new.
Case studyAdd your before and after photography below. Each pair links to the full case study for that project.
Add before photo
Add after photo
Add before photo
Add after photo
Add before photo
Add after photo
Add before photo
Add after photo
We work across premium residential areas throughout all three counties. Click any location for specific information about roof cleaning conditions and property types in that area.
Wooded plots, period and executive homes. Among the most demanding moss-growing conditions in our coverage area.
Ascot → · Sunningdale →Wentworth Estate and surrounding GU25 properties. Mature woodland, high humidity, complex roof forms.
Virginia Water →Period and executive homes. Thames-side humidity, Great Park proximity, historic property stock.
Windsor →Old Town, Gerrards Cross and the Chiltern villages. High rainfall, wooded plots, period properties.
Beaconsfield →“[Paste a real Google review here. Choose one that mentions the method, the result or the documentation. The more specific the detail, the more trust it builds.]”
“[Paste a second real Google review here — ideally from a different area to the first review.]”
“[Paste a third real Google review here — a review that mentions the before and after improvement or the survey process rounds this set out well.]”
Glanville Exterior Cleaning was founded by Isaac Glanville, a former firefighter who built the business from scratch with a clear principle: do the job properly or not at all. That means the right method for the right roof, biocide treatment on every clean, and documentation that gives homeowners a record they can actually use.
We are not the cheapest option in Berkshire. We are the option that uses professional-grade chemistry, safe specialist equipment and a standard of care appropriate for the premium properties we work on. The reviews reflect that. The results reflect that.
Every survey, quote and conversation about your roof is handled directly. You speak to the person who will be on your roof, not a call centre.
We provide professional exterior cleaning and maintenance services for commercial properties across Berkshire, Buckinghamshire and Surrey. Full documentation, RAMS available, flexible scheduling and annual maintenance programmes.
Honest, detailed information to help you make the right decision about your roof — written by a specialist who has seen every scenario.
The honest answer: it depends on the method and the tile type. This guide covers when cleaning is safe, when it can cause damage, and what makes the difference.
Read the guideWhy prices vary, what affects the cost, what a professional quote should include, and the red flags that tell you a quote isn’t what it appears to be.
Read the guideCleaning removes the visible moss. Biocide treatment addresses the biological root cause. Without it, the moss comes back within eighteen months. Here is why.
Biocide treatment guideWe survey your roof in person, explain exactly what we find, and provide a clear fixed written quote. No obligation to proceed. No pressure. Just an honest assessment of your specific roof.