Roof Cleaning Services in Southwark

Roof windows changed these houses more than anything else in the last thirty years, and they changed the roof itself as well. Each one sits in a hole cut through the covering, surrounded by a flashing kit of aprons, soakers and side sections designed to carry water around the frame and back onto the tiles below. It works beautifully while the tiles above stay clear. The moment growth arrives, the window becomes the place everything stops. A slate roof was never cut for openings when it was laid, so every one of them is an alteration the covering has had to live with since.


Debris does not travel past an obstruction, it collects behind one. Moss and leaf shed from the courses above pile against the top flashing, hold water there permanently and slowly rot the seal between frame and covering. Inside, the first sign is usually a mark on the plasterboard reveal or a draught nobody can account for. Householders blame the window, ring the manufacturer and are told the unit is fine, which it usually is. The problem is sitting on the tiles above it. Nothing about a sealed unit fails as quickly as the junction holding it in place.


Clearing above the frame is where this job earns its money. Ben's Roof Cleaning provides dependable roof cleaning in Southwark with the tiles above every roof window cleared first and the flashing kit checked while the slope is being treated. Nothing is prised or unscrewed. Tell us how many windows the roof carries and a quote comes free. Findings come back in pictures rather than description.

About Southwark

Southwark terraces have been converted upward on an enormous scale, and roof windows now feature on rear slopes across Peckham, Nunhead and Bermondsey. Most sit in original slate, cut in decades after the covering went on, with flashing kits of varying age and quality surrounding them. Ages vary enormously across a single street, and so does the standard of the installation.



The borough rises away from the river, and the residential roads carry mature street planting. Rear slopes facing away from the afternoon sun stay damp for long stretches, which is precisely where most of those windows were installed. Long afternoons of shade are exactly what keeps material sitting where it lands.

Essex is the primary service area for roof cleaning in Enfield, and the roads across cover the distance easily. Housing with mortar-bedded ridges repeats the whole way along them, so failing bedding is familiar territory. Roofers rebed or dry-fix a ridge properly. Treatment covers the ridge line as well. Gale damage arrives without warning.

What Gathers Around a Southwark Roof Window

An obstruction collects rather than sheds. Growth coming down the slope stops at the top flashing instead of travelling past it, and what stops there stays there through the winter. A clear slope carries material past; an interrupted one does not. Flashing kits vary enormously in age across a single slope. Debris stops at a frame rather than travelling past it.



Water gets held against the seal. A pile of wet moss above a frame keeps the junction permanently damp, which is the one condition a flashing kit was never designed to work in. Seals cope with running water and struggle with standing water. Material stopping at a frame stays there through the winter.


The window takes the blame unfairly. Manufacturers get called about draughts and marked reveals when the unit is sound and the trouble is sitting on the tiles a foot above it. Replacing a sound window solves nothing at all. Frames were fitted long after the covering was originally laid. Openings interrupt a slope that was continuous when laid.

Our Services in Southwark

What our customers have to say...

Cleaning a Southwark Roof With Skylights

The tiles above each window come first. Growth is cleared from the courses feeding down onto the frame before any treatment goes on, since that is where the material collects. Courses either side get the same attention, since material travels sideways as well as down. Seals are inspected from above rather than assumed to be sound. Both sides of each opening are worked as well as above.



Nothing is unscrewed, prised or lifted. Flashing sections, clips and seals stay exactly as installed, and anything that has slipped is recorded rather than pushed back into position. A slipped section is worth a roofer seeing rather than a quick push back into line. Courses above each opening are cleared before anything else. Treatment covers the slope so regrowth above the frame slows. Treatment continues down to the eaves below each frame.


The whole slope is then treated. A biocide across the covering keeps working for months, which slows the rate at which fresh material starts building above the frames again. Regrowth above a frame is what brings the trouble back, so that is what the treatment targets. Nothing is unscrewed, prised or adjusted around a fitted unit. Nothing is walked on where an opening weakens the slope.

How Southwark Roof Windows Are Handled

Windows get individual attention. Ben's Roof Cleaning bases trusted roof cleaning in Southwark on a risk assessment written for each property, insured throughout, and every opening on the slope is looked at. Two windows on one slope can be in completely different condition. Nothing about the glazing itself forms part of this work. Photographs record each frame separately for the file.


Glass is left to others. Cleaning the panes themselves is a window cleaner's job; what we deal with is the covering around them and the junction where the two meet. Anything beyond the covering itself gets named rather than quietly attempted. Manufacturers are rarely the right first call for a marked reveal. Nothing is adjusted on a unit still under warranty.


The report names each one. Which window is collecting worst, what the flashing looks like and anything showing at the reveal inside are set out with photographs. Owners generally have never seen the top of a frame before. Findings are written so an installer can act on them. Owners hear which openings need an installer rather than us.

Book a Southwark Roof Window Clean

Two details will price it. Ben's Roof Cleaning has offered trusted roof cleaning in Enfield for over 15 years. Give the address, the age of the house and whether any ridge tile looks out of line. Autumn attendance puts a loose ridge tile on record before the gales. Yearly attention keeps moss in the bedding from spreading.


One agreed price covers the property: growth taken back, treatment across the slopes, the ridge and hips inspected and photographed, and the ground cleared. Costs are settled beforehand. Autumn attendance puts a cracked fillet on record before the gales. Reporting here always photographs growth at the apex. Yearly attention keeps a failing fillet from spreading.



Ring us or write with those details. A marked reveal is worth chasing before winter rather than during it. Ask for a figure and we will find a suitable morning. Written notes follow each attendance. Photographs of the reveal help considerably before an attendance. Nothing further is charged for the written account. Photographs of the interior marking help considerably..

Frequently Asked Questions

  • Why does my roof window leak when it is new?

    Usually it does not. The unit is generally sound and the trouble is growth piled above the top flashing, holding water against the junction with the covering. Openings interrupt the run of the covering.

  • What marks the plasterboard inside?

    Moisture getting past a seal that has been kept permanently wet. Once the tiles above are clear and the covering dries properly, the cause is gone. Standing water is what the seal cannot take.

  • Do you clean the glass as well?

    That is a window cleaner's trade. Our work is the covering around the frame and the flashing junction, which is where the actual problem sits. Manufacturers hear about this constantly.

  • Will anything be unscrewed?

    Nothing at all. Flashing sections, clips and seals stay exactly as installed, and anything that has slipped is photographed rather than pushed back. Fittings stay exactly as installed.

  • Why does debris collect above the window?

    Because it cannot travel past an obstruction. Material coming down the slope stops at the top flashing, and what stops there stays through the winter. Material travels sideways as well as downward.

  • Should I call the manufacturer first?

    Plenty of people do and are told the unit is fine. Clearing the tiles above it costs less than a callout and solves it more often than not. Callouts cost more than clearing does.

  • Do older windows suffer more?

    The flashing kits vary enormously in age and quality on these roofs. Each one is photographed so you can see which is holding up and which is not. Kits vary in age across one slope.

  • How often should a slope with windows be done?

    Every three or four years. Openings interrupt the run of the covering, so material accumulates around them faster than on a clear elevation. Frames collect faster than open tile.