Roof repairs: the warning signs, the options and what we actually find up there.
We are roof cleaning specialists, not a re-roofing firm — and that is exactly why this page is useful. We are on Bedfordshire roofs every working day, so we know what fails, what it looks like from the ground, and what it costs you to ignore.
What Sky Scrapers does — and where a roofer takes over
Our work
- Traditional hand roof cleaning — no high-pressure washing
- Manual moss, lichen and organic build-up removal
- Softwashing and biocide treatment to slow regrowth
- Gutter clear-outs, downpipe checks and fascia cleaning
- A close-up condition check and photographs on every job
Needs a roofing contractor
- Structural repairs, re-roofing and new coverings
- Re-bedding ridges and hips, or fitting dry-fix systems
- New lead work, valley replacement and chimney flashings
- Rotten battens, torn sarking felt and timber repairs
- Anything involving scaffolding beyond safe access for cleaning
We would rather tell you the truth and lose the job than sell you a clean that hides a defect. If a repair is needed before cleaning makes sense, we will say so.
Eight warning signs you can check from the ground
None of these need a ladder. Please do not climb one — roof falls are the single most common serious accident in home maintenance.
Tile fragments or grit in the gutters and on the drive
Concrete tiles shed their surface as they weather, and mortar bedding breaks down. Loose fragments after wind or rain usually point at a ridge, verge or a run of tiles that has started to move.
A tile out of line, tipped up or missing altogether
Slipped tiles are most often a failed nail or a broken nib rather than a failed roof. Left alone, the exposed batten and felt below take the weather directly and the problem spreads across the course.
Damp patches on upstairs ceilings after driving rain only
Rain-driven ingress rather than a constant leak. Typical causes are open pointing at the verge, a lifted flashing at a chimney or abutment, or water tracking down a blocked valley.
Water running down the outside wall in heavy rain
Almost always a gutter or downpipe problem — a joint that has dropped, a blocked outlet, or a run packed with moss washed off the roof. It is one of the most common things we clear.
Thick moss cushions and standing water on the pitch
Moss holds water against the tile surface and pushes it sideways under the laps. It also breaks off in storms and blocks valleys and gutters downstream.
Cracked or hollow-sounding mortar along the ridge
Bedding mortar has a finite life. Once it cracks through, ridge tiles can lift in high wind. This is a job for a roofer, and it is one of the things we photograph and flag.
Green or black staining spreading down one slope
Algae and lichen on the shaded, damp elevation. Cosmetic in the short term, but a signal the slope stays wet longer than it should — worth cleaning and treating before growth thickens.
Daylight, drips or sagging felt visible in the loft
Check the loft after heavy weather. Daylight through the covering, wet timbers or torn sarking felt all need a roofer's eyes on them before anything else happens.
Common roof repairs explained
Understanding what a quote is describing makes it far easier to compare two of them. Here is what the common terms actually mean.
Slipped, cracked and broken tiles
Individual tiles that have slipped their nib or cracked through. Repair means lifting the courses above, replacing the tile and re-fixing it — a small job when it is caught early and an expensive one once the batten and felt below have rotted.
Ridge and hip re-bedding or re-pointing
Ridge tiles sit on a mortar bed that eventually cracks and lets go. Re-pointing tops up the joint; re-bedding lifts the tiles and relays them properly. Modern practice is often a dry-fix ridge system instead of mortar.
Verge repairs
The mortar edge at the gable is the most weather-exposed detail on most houses. Once it crumbles, wind gets under the end tiles. Dry-verge systems are a common replacement.
Valley and lead flashing work
Valleys carry the most water on the roof and are the first place debris packs down. Failed lead, split GRP or open flashing at chimneys and abutments is a frequent source of intermittent leaks.
Gutter, downpipe and fascia repairs
Dropped joints, split lengths, loose brackets and blocked outlets. We clear and check gutters as part of our own service, and we will tell you when a section has failed rather than simply blocked.
Loose or damaged flashing at chimneys
Stepped lead into the brickwork, cement fillets and soakers. Cement fillets in particular crack with movement and are a classic cause of a leak that only shows in wind-driven rain.
Every job includes a condition check
Survey before anything is touched
We look at the covering type, age, fixings, ridge, verges, valleys, flashings and gutters, and we note anything already damaged before we start work.
Photograph what you cannot see
Most roof defects are invisible from the ground. We photograph the details that matter so you can see the actual condition of your roof rather than take our word for it.
Honest recommendation
We tell you what needs doing, what can wait, and what falls outside cleaning and needs a roofing contractor. If a roof is not worth cleaning yet, we say so.
Most of the repairs we see started as maintenance nobody did
Moss is the usual culprit. It holds water against the tile, breaks off in storms, blocks the valleys and packs the gutters until rainwater finds the wall instead of the downpipe. None of that is dramatic on its own; together it is how a sound roof turns into a repair bill.
Keeping the covering clean and the drainage clear will not make an old roof new, and it will not fix a defect. What it does is stop the slow, avoidable damage — and it means somebody who knows what they are looking at gets close to your roof on a regular basis.
Roof repair FAQs
Do Sky Scrapers carry out roof repairs?
Our specialism is cleaning — hand roof cleaning, moss removal, softwashing and biocide treatment, and gutter and fascia cleaning. We are on roofs every working day, so we inspect and photograph condition as part of every job and tell you plainly what we find. Where a repair is needed we set out what we can sort while we are there and what needs a roofing contractor, and we never invent work.
Will a roof clean fix a leak?
No. Cleaning removes moss, algae and organic build-up and clears the drainage paths, which stops water being pushed where it should not go. It does not replace a cracked tile, re-bed a ridge or repair a flashing. If your roof is leaking, get the defect fixed first and clean afterwards.
Could cleaning my roof cause damage or reveal a problem?
Hand cleaning is the gentlest method available, which is exactly why we use it — no high-pressure lance driving water under the laps. What cleaning does do is expose defects that thick moss was hiding, such as a hairline crack or a tile already loose on its nib. We record those and show you the photographs rather than quietly covering them up.
How urgent is a slipped tile?
More urgent than most people assume. The felt and batten underneath are not designed to be the weather layer. A single slipped tile is a quick fix; the same tile left through a winter can mean rotten battens and a stained ceiling.
How often should a roof be inspected?
A visual check from the ground twice a year and after any serious storm is sensible, plus a look in the loft after heavy rain. If you are booking a clean anyway, you get a close-up condition check as part of it.
What information should I have ready when I call?
The rough age of the house, the roof covering if you know it (concrete tile, clay, slate), what you have noticed and when, and a photograph from the ground if you can take one safely. Never go up a ladder to investigate a roof yourself.
Do you work on commercial or rented properties?
Yes. We work for homeowners, landlords, letting agents and businesses across Bedfordshire and the surrounding counties. Condition photographs are particularly useful for landlords keeping a maintenance record.
Related reading
Towns we cover, roof problems explained and guides to how the work is priced.
Towns we cover
- Traditional roof cleaning across Ampthill and the MK45 area
- Roof moss removal in Ampthill
- Roof softwashing and biocide treatment in Ampthill, Bedfordshire
- Guttering, fascias and soffits in Ampthill
- Traditional roof cleaning across Flitwick
- Roof moss removal in Flitwick