Existing service penetrations can often be weatherproofed successfully. However, suitability and the correct approach depend on several factors.
Are all existing service penetrations suitable for weatherproofing?
Many existing service penetrations can be weatherproofed without extensive remedial work. However, suitability depends on:
- The roof or façade build-up.
- The type of services passing through the building envelope.
- The condition of the surrounding materials.
Existing vertical or roof penetrations are often more complex than those in new-build projects. They may have hidden defects, restricted access or incomplete construction records. These issues may require repairs or site preparation before weatherproofing begins.
What factors should be considered when weatherproofing an existing service penetration?
Several factors can influence a weatherproofing project, including:
- Substrate – Some construction materials may not be compatible with all weatherproofing methods.
- Condition – Deterioration may make some weatherproofing methods unsuitable or require remedial work.
- Access – The installer must be able to reach the substrate and have enough space to prepare the surface and apply the weatherproofing.
- Service type – The service’s material, size and layout all matter.
- Live services – Weatherproofing can be more complex if services must remain operational.
- Availability of information – The more that is known about the existing build-up, the easier it is to choose the right weatherproofing method.
Depending on the project, other considerations may include weather resistance, airtightness, thermal continuity, fire requirements and the terms of existing warranties.
How can I determine whether an existing service penetration can be weatherproofed effectively?
Drawings and photographs can help determine whether an existing service penetration can be weatherproofed effectively. Providing as much information as possible, such as the substrate, service type, previous repairs and any known water ingress, can help a building penetration specialist develop an effective weatherproofing strategy.
However, these details may not reveal the full condition of the existing penetration or all of the project requirements. A site assessment may also be necessary to determine a suitable weatherproofing approach.
What is the best method for weatherproofing an existing service penetration?
At Jones Weatherproofing, our liquid weatherproofing system is suitable for a wide range of substrates, including GRP roofs, making it well suited to weatherproofing existing penetrations.
The system is cold-applied, UV-stable and solvent-free. It cures to form a hard, seamless and durable surface. Because it is applied as a liquid, it can be used around penetrations of any size or shape, creating a reliable seal without preformed components.
Where can I get advice about weatherproofing service penetrations?
Need advice on an existing service penetration? Get project help from Jones Weatherproofing. We can review your project details and any drawings or photographs, then develop a bespoke solution.
