London Flat Roofing investigated a leak caused by two old joined leaking roofs of different materials – plastic and corrugated asbestos. With no falls on one of the roofs and lots of details to dress around, we chose the Kemper V210 System. This is reinforced fleece saturated with a resin, and can be formed around most details; when completed there are no joints, therefore safeguarding against leaks.
One thing’s for sure, all the insulation on the roof will have to come out and we will have to probe the timbers to find out their moisture content before we can even think of re-roofing. We have our suspicions that not only was the vapour barrier not installed correctly on this roof, but the roof was also leaking in places. I will post more videos as the job progresses.
This roof is leaking or sweating, so we’ve been asked to make some inspection holes to see if we can determine the cause of the problem. We first noted that the falls on the roof are incorrect and inadequate, as water is puddling. For a 4 year old building, this is not a good sign. One of the things that kills a flat roof is incorrect falls, and that is the case here.
This flat roof is covered with a single ply roofing material and at the moment we don’t know if the roof is leaking or there is a problem with the vapour control barrier, we have to make holes all over the roof to assess the situation before our surveyors can work out what the exact problem may be.
This old mineral felt roof was covering ten garages. We stripped the old leaking mineral felt covering and removed all the old decking, fixed new joists then new decking with Sterling board (not ply). Then we re-roofed the garages using EPDM rubber as this is a long-lasting material with a lifespan of over 40 years, and is perfect for large open areas. I would’ve recommended other materials like Kemper v210, RoofKrete or Liquid Plastic if the detail was difficult, but EPDM looks good here and is the perfect roofing material for this project.
Replacement of an old flat asphalt roof using insulation covered with EPDM, a skylight and a new insulated tank box. We had to have a tin roof over the roof for this project, because we knew the roof would be open for longer than a day. The new flat roof will be insulted to the new building regulations. New flat roofs today have to be insulated to a very high standard today.
Inverted roofs, or upside down roofs, have the insulation laid onto the waterproofing membrane. There is normally some ballast to hold the insulation down. The problem with this kind of flat roof is that if maintenance is needed or there is a leak from the flat roof, it’s very difficult to find the leak, as you will see large areas of the insulation have to be removed, just to look at the flat roof covering.
This is a flat roof with a large puddle in the middle. The weight of the water has made the supportive timbers below bend and break. London Flat Roofing Ltd have had to carry out some major repair work and strengthening of the roof to bring the roof back to a good sound condition.
If your roof is leaking, a new flat roof formed from Kemper v210 is a good choice. This system is relatively cheap and comes with a good guarantee. Flat roof repairs can also be carried out using the material. New flat roofs can be layered over the old flat roof, so stripping and exposing the old decking is not always necessary. If you are in the www.London-Flat-Roofing.co.uk area we will pop over and give you a free site survey. Areas we work are Harrow, Finchley, Barnet, Mill Hill, Kensington, Chelsea, St Johns Wood, Hampstead W8, W2, W1, NW1, NW3, W4, and the list goes on, but basically everywhere inside the M25.