For this you will need to first clean the entire roof surface with a pressure washer.
Repairing cracks in flat roofs.
Once the primer is dry apply an elastomeric sealant to the cracks corners and damaged areas and then to the entire roof.
Inspect the roofing for cracks at raised ridges and blistered areas.
Suited for repairs to felt concrete and asphalt.
Typical cracks show up as deep lines in the roofing.
Remove loose roofing gravel at the area of a crack with a wire brush.
Like all flat roof systems gutters are prone to be blocked and need to be regularly cleaned.
As with most temporary flat roof repair work a paint on solution can fix leaks.
For small repairs grind out the effected area back to the board then apply some woven bandage with roofing resin blend the new with the old the best you can applying slightly more resin than required prior to sanding back smooth before you apply the roofing topcoat.
Suitable for cracks in felt asphalt and lead.
This will achieve a much nicer finish.
Felt flat roof repair.
Old pour and roll felt roofing can crack get puncture holes usually from impact or the felt could split.
And not to use too much of it making it uneconomical messy or potentially more difficult to repair replace professionally later on.
Cut around the damaged area until the membrane rests flat.
The surface may also suffer from dips or hollows.
Where the flat roof abuts a wall there will be some form of sealing flashing usually a zinc or zinc substitute strip.
For most small punctures you can repair your roof simply by forcing sealant into them.
The best way to repair this flashing is to use one of the proprietary self adhesive repair tapes follow the manufacturer s instructions.
Using a utility knife make a shallow cut until you can remove material around the spot without damaging the layers underneath it.
In addition to this it is advisable to regularly sweep your roof to clear the build up of any debris such as leaves and dirt.
Edging can also lift or old flashings against the wall could leak.
The trick with any flat roof repair is use the right repair material on the right type of roof.