The short answer
Sometimes, but not as a promise. When the cause is plain, such as a slipped slate or a cracked ridge tile, one visit can finish the job. More often the first visit stops water entering and makes the roof safe, and the lasting repair comes after, when weather, materials and access allow. We will tell you which kind of visit yours is before work starts.
A leak that stops on day one is not always a leak that is mended. The difference matters, and you should know which one you are paying for.
When one visit really does finish it
Some leaks have an obvious cause that can be sorted in a single trip. A slate or tile that has slipped out of its course leaves a gap straight onto the underlay beneath the tiles, and a replacement fitted properly closes it. A cracked ridge tile, the capping that runs along the very top of the roof, can be rebedded or swapped. Flashing that has lifted, the metal seal where roof meets wall or chimney, can often be dressed back down.
What makes a repair a one visit job?
Three things tend to line up. The cause can be seen and reached with a ladder. The materials are on the van or can be matched on the day, which is easy for common concrete tiles and harder for old clay or a particular slate. And the weather lets the work be done properly, because a repair made in the wet with mortar or sealant does not always last.
Even then, the roofer should look around the repair. A slipped slate is often one of several, and a single clean fix does not mean the next gale will not catch the one beside it.
Why the first visit is often a make-safe
When a ceiling is already letting water through, the priority is to stop the damage growing. That can mean a temporary cover over the opening, a patch of membrane, or a tarpaulin fixed down so the wind cannot lift it. The aim is to stop water entering, and the lasting repair is planned for later.
Is a temporary repair the same as a fix?
No. A temporary repair buys time. It keeps rain out for now, and it gives the roofer time to open up the area, find how far the damp has spread, and order what is needed. A tarpaulin is not a covering you want to leave over the winter, and a bead of sealant under a tile is not a substitute for rebuilding the detail properly.
Where a leak has been running a while, the visible hole may only be the end of the story. Battens, the thin timbers under the tiles, may need replacing if they got wet. Insulation may have soaked up water and slumped. Those jobs cannot always be done in the first hour on a wet roof, and it is better to hear that plainly than to be told it is all sorted.
What can hold up the permanent repair
Several ordinary things can push a permanent repair to a second visit. Dry weather is the first. Roofing materials such as lead, mortar and adhesive-backed membranes need dry surfaces, and a roofer who works in the rain to look busy is doing you no favours.
Why might the right materials not be to hand?
Matching an older roof can take time. A Double Roman tile, a hand-made clay plain tile or a particular slate may need sourcing, and where a roof is listed or in a conservation area, the choice of material also has consent implications. Our answer on temporary roof repairs explains what a make-safe can and cannot do in the meantime.
Access is the other usual cause. A high chimney stack, a roof over a conservatory, or a slope above a pavement can need a tower or scaffold, and a scaffold standing on the road or pavement needs a licence issued by the highway authority (Highways Act 1980 s169), which adds time that a ladder job does not need.
The last cause is the roof itself. If the survey shows the covering is worn out, patching a hole in it may only move the leak a few feet along, and the better advice is to plan a larger repair.
How to judge a roofer who promises a fix
Be wary of anyone who says on the phone, before seeing the roof, exactly what the job will be and what it will cost. Water travels, and the stain on the ceiling and the hole in the roof are often far apart.
What should you be shown before you agree?
Ask to see pictures of your roof taken during the visit, showing the damaged area and the repair. A roofer who has been up should be able to show you what was found, explain what was done and say what is left to do. If a make-safe was fitted, you should know how long it is expected to hold and what the next step is.
Ask for one total price in writing and find out whether VAT and scaffolding are in it. For a leak found after a storm, the insurer should be told first; our answer on home insurance and a leaking roof covers what to keep.
To find out whether your leak is a one visit job, send photos of the ceiling and the roof from the ground. The survey that follows says which kind of visit you need, with photographs from your own slopes and a total in writing for the work. The emergency roof repairs page explains how it works.
More on first visits and leaks
Will the ceiling stain disappear after the roof is mended?
Not by itself. A stain is a mark left by water and it stays until the ceiling is dried, sealed and redecorated. Wait until the plaster has dried completely before painting, and use a stain blocking primer. If the ceiling is bulging or sagging, have it checked before anyone stands beneath it.
Should I wait for dry weather before calling a roofer?
No. Call as soon as water is coming in, because a make-safe can be fitted in conditions where a permanent repair cannot. Protect the room, move furniture, and photograph the damage. The lasting work can then be planned for a dry spell, once the cause has been found.
The full picture: Emergency and general roof repairs in Taunton ยท More short answers