- Posted March 18, 2014 by
jjm home modification answer the question :How do I restore a fiber cement roof?
Many buildings in our campaigns have fiber cement roofs: old barn renovated to house, jjm home modification economy during construction... If you have bought a property with this type of roof, this article is for you. Of course the best advice is to replace this coating a more traditional roofing (tiles, slate, steel pan... ). But the cost of such a change is very important, so until we have the necessary budget... maintain your roof!
Inspect your roof
It should already have a general idea of the condition of the roof before undertaking any work. jjm home modification For this, nothing is easier than to go closer: finding holes, check chaining, ridge, gutter....
The disadvantage of fibro plates lies in the fact that as you age, they become porous! We must therefore see when frost or heavy rain, if the inside of your left wet plates ( home side).
Proceed to cleaning!
When you have checked the condition of your roof, you must make a great cleaning.
You must remove the foam that had accumulated over time and promotes moisture ( not care if high pressure cleaning asbestos ).
Then you can pass an anti foam product with a sprayer ( less than 4 bar ). jjm home modification It is often necessary to spend 2 layers in dry weather, so that the product acts in the best ( curative effect with elimination of fungi, moss, lichen and sustainable preventive effect... ). The best is, of course refer to the product label.
Regular cleaning of gutters is also an essential element.
Waterproof your roof
Under the effects of weather, aging and damaged materials. Prevention, or renovation, it must pass a water repellent that will harden the material but also facilitate run-off and thus reduce the drying time of plates ( in gels, rain... ). This will improve your potential condensation problems and moisture. Be careful to take a permeable product water vapour so that your roof can still breathe.
Ask a screen underlay if it is not enough
If despite all your plates are porous, it will consider the installation of a sub- screen roof between the rafters and your plates. This remains difficult to perform since we took off the roof, ask the screen underlay and put the fibro sheets.
Be careful to take a HPV screen is to say that your breathable insulation, jjm home modification under penalty of having condensation problems!
From inside the house to the outside, you will need:
- Final coating ( eg plasterboard )
- + Vapor barrier insulation (often hooked together )
- Blade ventilated air 2cm
- Screen under roof
- Blade ventilated air 2cm
- Fibro plate.