Step 1 prep work.
How to felt a flat concrete roof.
Materials for felting a flat roof.
While laying felt is not an easy job it can be done by anyone who has the patience to deal with it.
For example the florida based company hurricane proof systems offers a 7 inch 18 centimeter slab of concrete in three layers.
This will give a good 15 20 years if done correctly.
Newer flat roofs on the other hand are often made of rubber.
Felt is laid on a flat roof to help keep the roofing system waterproof.
The most common complaint with regard to both concrete tile and flat concrete roofing is water leaks.
Check to ensure the roof is in good enough condition to walk over.
Use asphalt gravel or cap sheet on top of the felt if necessary and follow manufacturer instructions for the particular material.
Don t forget to replace roofing felt.
Lay a 11mm ply over the deck fix and secure with screwing the decking down.
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.
Here are simple steps to get you started.
Lay a epdm rubber roof this i would say is the best method.
The first thing to note is that it is the reinforced concrete slab not the screed that keeps the water out.
A concrete roof is exactly what it sounds like.
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.
The rolls of felt are quite heavy and to avoid damage must be handled with care.
Flat concrete roofs as they are locally constructed have a number of issues.
Use the type of felt most compatible with your roof selecting from asphalt infused felt polyester felt tar saturated felt or another kind.
Exact specifications vary but most concrete roofs are several inches thick.
The walls must be built strong enough to support it.
Prime the concrete with a bitumen primer then install a 3 layer felt system.
Leaks in concrete tiles can often be fixed by replacing.
It s a single storey structure attached to the main house with a flat concrete roof sealed with bitumen felt.
A solid slab of concrete capping the top of your house.
This is a good diy weekend project requiring only a few basic materials.
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.
