Don t forget to replace roofing felt.
How to felt a flat concrete roof.
When there are leaks in a flat concrete roof the fast fix is usually to apply some kind of sealant or waterproof cement at the site of the leak.
Lay a 11mm ply over the deck fix and secure with screwing the decking down.
Materials for felting a flat roof.
It s a single storey structure attached to the main house with a flat concrete roof sealed with bitumen felt.
The best time to lay a felt roof using cold applied adhesive is when the weather is warm but this means that working on a flat roof can be exhausting work with the sun s heat and the heat reflected from the felt already laid.
Flat concrete roofs as they are locally constructed have a number of issues.
While felting a flat roof is not a particularly complex project it does require some patience and perseverance to make sure that the felt goes on smoothly and evenly.
The most common complaint with regard to both concrete tile and flat concrete roofing is water leaks.
It must be correctly designed and constructed.
Felt is laid on a flat roof to help keep the roofing system waterproof.
Step 1 prep work.
The rolls of felt are quite heavy and to avoid damage must be handled with care.
The first thing to note is that it is the reinforced concrete slab not the screed that keeps the water out.
Exact specifications vary but most concrete roofs are several inches thick.
Check to ensure the roof is in good enough condition to walk over.
A concrete roof is exactly what it sounds like.
The felt has failed at the junction with the house it was tucked under the upper storey cladding but has come away but as the house has has wide eaves it only leaks if the wind is blowing strongly from the north east while it s raining.
A solid slab of concrete capping the top of your house.
There are 3 ways to do this type of roof.
Leaks in concrete tiles can often be fixed by replacing.
For example the florida based company hurricane proof systems offers a 7 inch 18 centimeter slab of concrete in three layers.
Prime the concrete with a bitumen primer then install a 3 layer felt system.
Lay a epdm rubber roof this i would say is the best method.
The walls must be built strong enough to support it.
This will give a good 15 20 years if done correctly.
Use asphalt gravel or cap sheet on top of the felt if necessary and follow manufacturer instructions for the particular material.
Use the type of felt most compatible with your roof selecting from asphalt infused felt polyester felt tar saturated felt or another kind.
While laying felt is not an easy job it can be done by anyone who has the patience to deal with it.
