Scottish roofs do not fail randomly. Between the Atlantic weather coming up the Clyde, hard frosts inland in Lanarkshire and the wind funnelling through Edinburgh's tenement streets, the same faults turn up at the same times of year. If you know the pattern, you can catch things while they are still a single-tile job.
Autumn: gutters, valleys and the first gales
The first real problems of the roofing year arrive in September and October. Leaves and moss wash into gutter runs and valleys, water backs up over the fascia, and the first named storms lift the ridge tiles that were already loose from the summer. This is the single most valuable month to have a roof photographed, because anything found now can be fixed before the wet season does the damage.
- Blocked or overflowing gutters, often visible as staining down the render
- Valleys packed with debris where two slopes meet
- Ridge tiles with cracked or missing mortar bedding
- Loose flashing around chimneys after the first gales
Winter: gales, freeze-thaw and water ingress
Winter is when small faults become expensive ones. Wind gets under a slate that has already slipped and takes three more with it. Water that sat in a hairline crack freezes, expands and splits the tile properly. Anywhere the underlay is already exposed, driving rain finds it.
The tell-tale signs from inside are usually a damp patch on a bedroom ceiling, a musty smell in the loft, or a stain that appears only after wind-driven rain from one particular direction. That directional clue matters — it usually points to the elevation the fault is on.
Spring: moss, mortar and what the winter left behind
Spring is the natural time to audit the damage. Moss growth is at its most visible after a wet winter, and on north-facing Scottish slopes it can be thick enough to hold water against the tile permanently. Mortar that took a freeze-thaw battering starts crumbling out of ridge and hip lines. Slates that slipped in January are now sitting in the gutter.
- Heavy moss on north and east-facing slopes
- Slipped or delaminated slates, especially on older Victorian stock
- Crumbling ridge and hip mortar
- Debris and tile fragments sitting in the gutter run
Summer: movement, heat and flat roofs
Summer is the quietest season for pitched roofs and the hardest on flat ones. Felt and single-ply take real heat, which shows up as blistering, split seams and ponding where the fall has settled. It is also the best weather window for repairs, so a survey in early summer gives you time to get quotes and get the work booked before autumn.
So when should you actually book?
If you can only do it once, do it in early autumn — you find the faults before the weather exploits them, and roofers are not yet fully booked with emergency call-outs. If you have just had a storm, book straight after it while the evidence is fresh. If you are buying, book before you conclude missives, not after.
A drone survey takes 20 to 30 minutes on site, costs a fixed £99 for a house, and gives you every elevation photographed with each fault circled and graded. Because we never quote for repairs, the report tells you what is there — nothing more, nothing less.