Hello everyone in the summer heat!
I will soon need to remove a white-painted asbestos cement board from the façade to allow for two pipe penetrations for internal/embedded rainwater pipes (110 mm). Knowing how porous/dangerous it is to work with asbestos cement, I have opted against making penetrations in the existing board. Now I wonder; do you have any tips before I start looking around at builders' merchants here around Lund; what are some sensible board materials suitable for this? In other words, good façade cladding/moisture resistance properties and reasonably easy to work with considering the pipe penetrations.
I should add that the asbestos cement is about 6 mm thick and the boards are 70 cm wide and 240 cm long - in the worst case, I can live with using two new boards and filling the joint.
Additional question; are there any specific risks with making such a penetration (it will naturally be a completely sealed pipe system, hardly needs mentioning)?
The wall in question belongs to an extension/storage area that is attached to the house - the same exterior wall - but with a partition wall on the inside. When I've broken away the interior wall paneling, it seems to be just framework wood, plasterboard, and some kind of simple wall insulation (not as thick as inside the house walls and then asbestos cement boards on the outside).
The storage would likely have been a cold storage if it had been freestanding, but it retains some heat even in winter since it's attached to the house.
As I understand it, there shouldn't be any specific issues with condensation and moisture migration around the pipe penetration - or?
I'm thinking of making the penetration hole in the exterior wall fairly tight, with a few millimeters of clearance that I then seal with exterior silicone or sealant. On the inside, I won't place anything, meaning neither insulation nor interior wall in contact with the pipe - instead, creating a kind of visible niche for the penetration that allows control and access to the pipe.
Best regards and thanks in advance,
Jörgen
I will soon need to remove a white-painted asbestos cement board from the façade to allow for two pipe penetrations for internal/embedded rainwater pipes (110 mm). Knowing how porous/dangerous it is to work with asbestos cement, I have opted against making penetrations in the existing board. Now I wonder; do you have any tips before I start looking around at builders' merchants here around Lund; what are some sensible board materials suitable for this? In other words, good façade cladding/moisture resistance properties and reasonably easy to work with considering the pipe penetrations.
I should add that the asbestos cement is about 6 mm thick and the boards are 70 cm wide and 240 cm long - in the worst case, I can live with using two new boards and filling the joint.
Additional question; are there any specific risks with making such a penetration (it will naturally be a completely sealed pipe system, hardly needs mentioning)?
The wall in question belongs to an extension/storage area that is attached to the house - the same exterior wall - but with a partition wall on the inside. When I've broken away the interior wall paneling, it seems to be just framework wood, plasterboard, and some kind of simple wall insulation (not as thick as inside the house walls and then asbestos cement boards on the outside).
The storage would likely have been a cold storage if it had been freestanding, but it retains some heat even in winter since it's attached to the house.
As I understand it, there shouldn't be any specific issues with condensation and moisture migration around the pipe penetration - or?
I'm thinking of making the penetration hole in the exterior wall fairly tight, with a few millimeters of clearance that I then seal with exterior silicone or sealant. On the inside, I won't place anything, meaning neither insulation nor interior wall in contact with the pipe - instead, creating a kind of visible niche for the penetration that allows control and access to the pipe.
Best regards and thanks in advance,
Jörgen
You might try using minerit. It is often used as a firewall, among other things.
If it were me, I would leave the board in place and make two holes in it. Especially since they are so large. It will be quite clear that a board has been replaced. You most likely won't get cancer and drop dead from making two holes. Asbestos is very harmful if you work with it daily in the dust, which the construction workers did back when eternit was used. But if you make two holes, outdoors moreover, I would probably say you can feel safe. If you don't want to rout or saw, which can stir up dust, you can score it with a sharp knife. Eternit is, after all, relatively porous.
If it were me, I would leave the board in place and make two holes in it. Especially since they are so large. It will be quite clear that a board has been replaced. You most likely won't get cancer and drop dead from making two holes. Asbestos is very harmful if you work with it daily in the dust, which the construction workers did back when eternit was used. But if you make two holes, outdoors moreover, I would probably say you can feel safe. If you don't want to rout or saw, which can stir up dust, you can score it with a sharp knife. Eternit is, after all, relatively porous.
Hi!
Thanks for that - I reconsidered and also realized that it would be easiest to make a hole in the eternit. Even though the material is extremely dangerous, I am inclined to believe that a single exposure to the dust over a lifetime cannot be super critical.
It turned out to be very difficult to saw the eternit with a circular saw, so I drilled a hole and broke off pieces with a large pair of pliers.
Thanks for that - I reconsidered and also realized that it would be easiest to make a hole in the eternit. Even though the material is extremely dangerous, I am inclined to believe that a single exposure to the dust over a lifetime cannot be super critical.
It turned out to be very difficult to saw the eternit with a circular saw, so I drilled a hole and broke off pieces with a large pair of pliers.