Ponding water on flat roofs (where water cannot drain away) can cause costly flat roof leaks. Mainly caused by poor draining preparation of the roof deck when constructed.
Another problem area is sun blistering of the roof membrane (usually mineral felt). Over time, once this cracking and splitting has occurred you will have ingress of rain and snow, eventually causing roof structure damage and roof leaks.
Clayridge Roofing have many years of experience and knowledge of installing and repairing flat roofing in Croydon and South London be it traditional or modern systems. We are happy to visit and advise you on the options available and the best course of action for your flat roof problems.
Here is an example from some of our work on flat roofs.
|Flat roof showing deterioration of original roof felt.Part way through re-roofing using heat gun to affix new felt.|
|Before and after looking to the rear of the property.|
|Before and after looking to the front of the property.|
This series of photos show work undertaken on flat roofs in 2009.
|Flat Roof – Croydon – back to top|
|Flat roof showing deterioration of existing felt prior to re-roofing.|
|The old roof is stripped to original boards and de-nailed, new insulation is installed between the joists.|
|New plywood is installed, then three layers of bonding felt, tacked down with half inch clout nails, spaced at four to six inches (not shown).Green mineral and felt top layer all bonded by hot torching.|
|Facias and guttering||Before||After|
|Flat Roof – Balham 2009 – back to top|
|The roof in it’s original condition.Starting the stripping process.|
|Stripped to original joists and new insulation installed.|
|New plywood sheeting installed.Three layers of bonding felt, tacked down with half inch clout nails, spaced at four to six inches. Tiles from other roof stripped back and new felt extended under tiles.|
|Green mineral and felt top layer all bonded by hot torching. The finished roof.|
|Flat Roof – Example 1 – back to top|
|Flat part of roof prior to re-roofing.|
|Flat part of roof stripped to original boards and de-nailed, replacing rotten timber and board where necessary.|
|Three layers of bonding felt, tacked down with half inch clout nails, spaced at four to six inches.Green mineral and felt top layer all bonded by hot torching.|
|Flat Roof – Example 2 – back to top|
|Old wood roof frame strengthened with new timbers and covered in new plywood sheeting.|
|Skylight surrounds in place.|
|Three layers of bonding felt, tacked down with half inch clout nails, spaced at four to six inches.|
|Skylight coverings in place.Starting to lay green mineral. Green mineral and felt top layer all bonded by hot torching.|
|Flat Roof – Example 3 – back to top|
|Flat roof prior to re-roofing.|
|Roof stripped and rotten timber replaced.Two new layers of bonding felt and one top layer of green mineral felt (far right).|