For Flat, Curved & Sloping Roofs

For Flat, Curved
& Sloping Roofs

25 Year Guarantee

25 Year
Guarantee

Specialist Advice & Support

Specialist Advice
& Support

Express National Delivery

Express National
Delivery

We've waterproofed 180m SqM of roofs!

We've waterproofed
180m SqM of roofs!

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a sample

Soil Vent Pipes
Soil Vent Pipes

The alwitra® soil vent pipe forms the upper end of vent pipes protruding over low slope roofs with waterproofing of any constructional type up to DN 125 (OD 125).

  • The soil vent pipe consisting of one single pipe extends over the roof build-up without any joints and is connected to the downpipe DN 125 (OD 125) and DN 100 (OD 110) below the roof structure by means of the included reducer.
  • A corresponding reducer (125/75) is available for downpipes DN 70 (OD 75)
  • The connecting flange can be made with EVALON®

Soil Vent Pipes

The alwitra® Shaft (Soil) Vent Pipe forms the upper end of vent pipes protruding over low slope roofs. The soil vent pipe consisting of one single pipe extends over the roof build-up without any joints and is connected to the downpipe.e below the roof structure by means of the included reducer.

Worldwide

As used on landmark architecture throughout the world

almost 40 years experience with waterproofing systems in the UK

Almost 40 years experience with waterproofing systems in the UK

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Advantages

  • The connecting flange can be welded dirtectly to the corresponding roof waterproofing without any auxiliary materials.
  • At the top, the soil vent pipe can be left open. Alternatively, the soil vent pipe can be covered against rain with the included vent cowl or with the optional weather cap
  • The lower part made of PP and PP bead foam is installed in the supporting substructure and flashed against the vapour and wind barrier; inserting into the vent pipe ensures air-tightness

Applications

  • Suitable for both warm and cold roofs

Product Details Back to top

Product Specification

Material: PVC pipe with vent cowl and optional weather cap made of PP
Colour: black, with factory-fitted connecting flange in the colour of the waterproofing membrane
Height above the waterproofing (excl. cowl): 300 mm
Outer pipe diameter: 125 mm (DN 125)
Outer connecting flange diameter: 480 mm
Outer support ring diameter: 240 mm
Ø of screw holes at support ring: 210 mm
Flange width support ring: 60 mm
Installation opening: Ø 190 (200) mm
Thermal insulation thickness: 0 - 300 mm (or 800 mm for SL)
Connection diameter: 125 mm (DN 125) and 110 mm (DN 100), 75 mm (DN 70) optional

Technical Drawings

Soil Vent Pipes

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Our membranes are used by architects, contractors & developers. View all

Archdiocese of Liverpool
Coventry City Council
Aecom
3D Reid
Balfour Beatty
InFrame Garden Rooms
Churchill
Fife Council
Angell Thompson
Alec French Architects
ISG
Aloft Roofing & Leadwork
English Heritage
Glasgow Housing Association
Coomber Associates
Arc
Jade-Aden
Ashtree Roofing

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Contact Us 01202 785200

Here's what some of our clients have to say...

We have been alwitra® contractors for many years and have always been impressed with the results and reliability of the product. The customers…

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Michael

I, James Hopkins Director of JH Specialist Roofing install single-ply membranes on a daily basis, we as a company have tried numerous types of…

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We have used VSK extensively over the last 5 years, we have found it to be a great product and really good for complex detail work. We find using…

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Dave

As a small flat roofing business carrying out mostly domestic refurb work and small extensions EVALON® VSK is our preferred single ply membrane…

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Charlie

We have been an approved contractor for many years, the level of customer service and the quality of the products provided by ICB (Waterproofing) is…

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Carlo

We have worked with ICB on several occasions and we would thoroughly recommend them for their high level of professionalism and efficiency. The team…

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OB Architecture

ICB provides an excellent service with all the professional back-up required at the development stage through to completion. The manner in which you…

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Dave

I am pleased to recommend ICB as Company, through my personal experience and that of my Business, for the following reasons: They are an easy Company…

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John

We believe, as one of your approved contractors, over the years we have had a great working relationship with yourselves. When working on projects…

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Martin

Best system on the market – VSK all the way!!!!!!

Richard

alwitra® is a lovely membrane when you have some detailing and gutters as you can go all the way through in a oner…

Dave

…that’s the beauty of this membrane, (you) can complete field sheet and upstand in one go, nice and tight and (a) crisp finish in the…

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Shaun

This product has to be the most versatile single-ply system we have used. Unbeatable finish.

Lee Orchard

EVALON® VSK – such a quality and versatile membrane.

Lee Orchard

In my mind the best single-ply.

Peter

Can’t beat VSK

Lee

We find all the staff at ICB, friendly, helpful & knowledgeable.

Steve

EVALON® VSK! Surely the best single-ply waterproofing membrane ever produced! A++++

Kevin

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