Repair to flat topped roof

[LesWilcock]

Dear forum members.

I am looking for some advice regarding a problem relating to my mothers garage roof.
This is a flat topped extension to the house and is felt covered with a small upstanding wall at the front.

During a recent rainstorm she noticed water running down the inside of the garage door and a quick inspect of the roof revealed an obvious culprit. The felt that ran up the upstanding wall had peeled back as the attached photos show.

I am looking at getting a roofer in to do the repair but would value comments from suitably experienced forum members as to potential options.

The other consideration is my mother is looking at selling the house within the next six months so whilst we have an obligation to the next owner to provide a secure and watertight solution, a new roof with a 99 yr guarantee wouldn't be an option.

I would value any comments that would allow me to have a knowledgable discussion with roofing contractors with respect to repair options.

Thanks in anticipation

Les Wilcock

 

[alan333]

To do the job properly you should remove the coping stones, felt all the way from the roof up the upstands, under the copes to an inch beyond the wall, and re-bed the copes. Obviously this would be expensive.
Next best would be to fix a drip batten to the outer edge of the copes, felt up the upstands, over the copes, and form a welted drip edge to the new timber batten, thus encasing the copes.
Next best would be to cut a chase in the wall and felt up to and into the chase, then pointing the chase with sand and cement mortar.
And finally the cheapest, and least chance of holding for any length of time... Repeat what's already there - remove the old felt upstands, prime the wall with bituminous primer, felt up to the underside of the copes, haphazardly put some silicon or something at the upper edge, and hope that it sticks and that water doesn't run down behind it. This will probably buy a bit of time.
The flat roof looks to be in sound enough condition to take new flashings, so probably no need for a complete re-roof.

 

[LesWilcock]

Hi Alan

Thanks for the most comprehensive response.

A final question, in your option what be a fair price for the last two options.
We're she staying longer I would have gone for the first two but I am looking at a more budget solution.

Thanks again

 

[alan333]

It's difficult to tell the length of the roof by the pics, but it looks like 5 metres or so?
If correct... one guy could do the job in half a day, maybe a bit longer if cutting the chase.
The materials wouldn't cost much, maybe thirty quid including a saw blade and some petrol.
The price comes down to whether someone would charge a half day, or a full day, depending on whether they want the job or not. Or whether they had another half-day job to go to after it.
Any roofers in your local pub fancy a homer?

 

[LesWilcock]

The wall traverses the front of the garage and as it's a single garage I would say it 3.0 meters as a max, probibly nearer 2.5.

So as a budget, a day should see it done.

Pity but all the guys at my local are Bankers so good for nothing.

Thanks again for the info, most appreciated.

Les