V F B Service & Maintenance Ltd

Separating the bath/sink/shower waste from the toilet and running it through the external wall separately could be a potential solution, but it's essential to consult with a qualified plumber or building inspector to determine if this is necessary and compliant with building regulations in your area.

1. **moisture barrier (dpm)**: since your walls have been rendered, there may be moisture present that could potentially affect the osb chipboard. using a damp proof membrane (dpm) between the rendered walls and the osb chipboard can help prevent moisture from penetrating the chipboard and causing issues like warping or mold growth. if there's any doubt about moisture levels, it's a good idea to err on the side of caution and use a dpm.

2. **fixings**: self-tapping screws can be used to attach the osb chipboard to the walls, but the choice of fixings may also depend on the thickness and condition of the rendered walls. if the walls are particularly hard or uneven, you may need more substantial fixings such as wall plugs or anchor bolts to securely fasten the chipboard.

3. **battening**: battening out the walls involves installing timber studs onto the walls and then attaching the osb chipboard to the studs. this method provides a more secure and stable surface for mounting the chipboard, especially if the rendered walls are uneven or have irregularities

It's essential to address the moisture issue first to prevent further mold growth. once the repairs are completed externally, you can remove the mold using a mixture of water and detergent or a specialized mold cleaner. afterward, apply an anti-mold primer or paint to inhibit future growth. products like zinsser mold killing primer or dulux anti-mould paint are popular choices. ensure proper ventilation in the room to reduce moisture buildup. if the mold infestation is severe, consulting a professional might be wise.

It's possible that your walls are made of solid masonry or plaster, especially if the property was built in the 1940s. without studs, hanging heavy items like a punch bag can be challenging. you could use heavy-duty wall anchors designed for masonry walls or plaster walls. these anchors expand behind the wall to provide support. make sure to choose anchors that are rated for the weight of your punch bag. alternatively, you could consider mounting a piece of plywood to the wall first and then attaching the punch bag to the plywood for added support. always follow the manufacturer's instructions and consider consulting a professional if you're unsure about the safety of your installation.