Good evening,
I have a question. I want to complete some tasks step by step. One of them is the new insulation of the roof surface in the extension. Normally, the roof structure is built up as follows (from outside to inside):
The membrane under the battens is not continuous across the entire surface. Two transparent plastic roof tiles were installed in the roof surface, and the membrane was interrupted there. Now the question arises: can I simply renew the section of the membrane from the outside and seal it with appropriate tape, at least for the time being? At the moment, I don’t have the option to remove the roof tiles and battens, then reinstall the membrane, and re-cover the roof. Therefore, the idea was to repair it from the outside accordingly, so that from the inside I can proceed with the insulation as usual.
So, is this possible? Or is there anything to consider? Apart from the risk of falling off the roof.
Michael
I have a question. I want to complete some tasks step by step. One of them is the new insulation of the roof surface in the extension. Normally, the roof structure is built up as follows (from outside to inside):
- Roof tiles
- Battens for tiles
- Membrane
- Rafters with insulation
- Membrane
- Battens for drywall or similar
- Gypsum board or similar
The membrane under the battens is not continuous across the entire surface. Two transparent plastic roof tiles were installed in the roof surface, and the membrane was interrupted there. Now the question arises: can I simply renew the section of the membrane from the outside and seal it with appropriate tape, at least for the time being? At the moment, I don’t have the option to remove the roof tiles and battens, then reinstall the membrane, and re-cover the roof. Therefore, the idea was to repair it from the outside accordingly, so that from the inside I can proceed with the insulation as usual.
So, is this possible? Or is there anything to consider? Apart from the risk of falling off the roof.
Michael
K
Knallkörper5 Mar 2017 20:18As long as you can properly seal the "patch" on all sides to the existing breathable roofing membrane, there is basically nothing against it.
Okay, is it better to apply the patch from the outside or the inside?
As a layperson, I would do it from the outside, first thoroughly cleaning the membrane so the tape can stick properly. Then, I would seal the patch on all four sides from both outside and inside. The membrane should then be tight enough to test if it’s watertight, using a watering can, and then check from the inside to see if it stays dry, right?
I’m familiar with this approach from other tasks, where I inspect the work to make sure the operation was successful—especially when access becomes more difficult afterward or potential damage could be greater.
As a layperson, I would do it from the outside, first thoroughly cleaning the membrane so the tape can stick properly. Then, I would seal the patch on all four sides from both outside and inside. The membrane should then be tight enough to test if it’s watertight, using a watering can, and then check from the inside to see if it stays dry, right?
I’m familiar with this approach from other tasks, where I inspect the work to make sure the operation was successful—especially when access becomes more difficult afterward or potential damage could be greater.
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