Damp Proofing

Damp proofing products prevent moisture from passing through from one area to another and is essential. Adding damp proofing solutions will prevent moisture or condensation in a structure, which can lead to damp if left unaddressed. We offer preventative and remedial damp proofing solutions.

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  • Over Fascia Ventilator 1000mm Over Fascia Ventilator 1000mm

    Over Fascia Ventilator 1000mm

    When installing a new or re-roofed building, it is necessary to ventilate the roof space between the felt and fascia board. This is where the over fascia ventilator comes into its own. Designed to be fitted on the top of the fascia board, it discreetly...
  • Support Tray Black Refurbishment Felt 1500mm

    Support Tray Black Refurbishment Felt 1500mm

    The Support Tray is designed to bridge the rafters and provide support for the roofing felt. It eliminates the problem of rotting felt caused by the sagging and retaining of water at low-level eaves in new build and refurbishment situations. This 1.5m...
  • White Continous Soffit Ventilator 2440mm White Continous Soffit Ventilator 2440mm

    White Continous Soffit Ventilator 2440mm

    The G800 Continuous Soffit Ventilator is a strip of UPVC. Airflow is guaranteed through a series of evenly spaced slots, narrow enough to keep out large insects but large enough to prevent the vent from becoming blocked. It is designed to provide a...
  • Weep Vent Terracotta Weep Vent Terracotta

    Weep Vent Terracotta

    To comply with building regulations and ventilation guidelines, Manthorpe's G950 Weep Vent provides an unobtrusive ventilation point for cavity walls. The vent has a baffled grille to prevent the ingress of wind and rain whilst incorporating an insect...
  • Underfloor Peep Weep Clear

    Underfloor Peep Weep Clear

    G951 peepweep is a cavity wall drainage solution with a mortar key to ensure adhesion to the building fabric and an external rib to aid positioning. The rib surrounds a 62mm high opening to prevent mortar blockage from within the cavity. Its protective...
  • Telescopic Underfloor Ventilator

    Telescopic Underfloor Ventilator

    Telescopic Underfloor Ventilators are designed to be fit into place during the bricklaying process, so as to provide a clear passage for airflow into the void space beneath the flooring, creating good ventilation. If you are installing the Ventilator...
  • Vertical Extension Sleeve for Telescopic Underfloor Vent

    Vertical Extension Sleeve for Telescopic Underfloor Vent

    The G961 is a Vertical Extension Sleeve for the telescopic under floor ventilator. The G961 can be used to extend the G960 telescopic under floor void ventilator vertically and horizontally. Each extension sleeve enables a further two course brick...
  • Remote Void Vent Remote Void Vent

    Remote Void Vent

    The G962 Remote Void Ventilator is a patented product which provides ventilation to the underside of the floorboard. The adapter can be easily cut down between the pre moulded cut lines to fit the G930 Air Brick or alternatively the G960 Underfloor Vent...
  • Vent Slate 600 x 300mm

    Vent Slate 600 x 300mm

    Our pre-marked cut lines mean no measuring or cutting is required. GRSV30/25 Slate Vent can be used for both high and low-level roof ventilation requirements. Alternatively, it can also be used as an outlet terminal for extraction fans and soil pipe...
  • Cavity Tray Apex Cavity Tray Apex

    Cavity Tray Apex

    The GW290 Apex Tray is the final tray to be installed and sits atop the abutment. The front mortar clip on the tray can be removed after the mortar has set, leaving a 25mm deep slot into which the lead is put and secured using lead wedges. The GW290 Apex...
  • Cavity Tray Right Hand Brickwork Intermediate Cavity Tray Right Hand Brickwork Intermediate

    Cavity Tray Right Hand Brickwork Intermediate

    Only one end of the GW291 and GW292 Right and Left Hand Intermediate Trays has an up stand. This allows water to drain from the tray and into the cavity tray system. The tray's upstand keeps rain from reaching the outside wall and spreading across the...
  • Cavity Tray Left Hand Brickwork Intermediate Cavity Tray Left Hand Brickwork Intermediate

    Cavity Tray Left Hand Brickwork Intermediate

    Only one end of the GW291 and GW292 Right and Left Hand Intermediate Trays has an up stand. This allows water to drain from the tray and into the cavity tray system. The tray's upstand keeps rain from reaching the outside wall and spreading across the...
  • Cavity Tray Brickwork Catchment Cavity Tray Brickwork Catchment

    Cavity Tray Brickwork Catchment

    The GW293 Catchment Tray is placed at the abutment's lowest point. Water that runs down from the trays above is collected and carefully channelled out of the wall by up supports at both ends of the tray. To drain the collected water, a G950 Weep Vent...
  • Cavity Tray Refurbishment Cavity Tray Refurbishment

    Cavity Tray Refurbishment

    The GW294 Refurbishment Horizontal Tray is meant to shield an existing wall from a new horizontal roof abutment. It can also be used in cases where the original system has decayed or been removed from the wall structure. It can also be utilised in...
  • Wykamol Baseline 8 Merchant Kit

    Wykamol Baseline 8 Merchant Kit

    This membrane kit is used to waterproof surfaces including flooring and walls, creating a sealed system for use in renovation projects. The kit comes with everything you need including double-sided joint tape, plugs, collars and seals.
  • Eco TPS General Purpose 4000 x 25,000mm

    Eco TPS General Purpose 4000 x 25,000mm

    Eco TPS General Purpose Sheeting is 4m wide and 25m long. It is suitable for use in a wide variety of situations to protect the surface from the elements of dirt and debris. TPS is a heavy-duty polyethene sheet that can also be used for the protection...
  • Cromar Breather Membrane Roll Classic Lightweight (115G) 1000 x 50,000mm

    Cromar Breather Membrane Roll Classic Lightweight (115G) 1000 x 50,000mm

    £43.47 - £65.22 (Ex VAT)
    £52.16 - £78.26 (Inc VAT)
    Vent 3 classic is for warm and cold roof applications, it has no additional ventilation and has excellent nail tear strength. It is UV stable for 3 months and is clean and easy to use, weighing 135 gsm.
  • Cromar Breather Membrane Roll High Performance (135G) 1000 x 50,000mm

    Cromar Breather Membrane Roll High Performance (135G) 1000 x 50,000mm

    £54.57 - £83.25 (Ex VAT)
    £65.48 - £99.90 (Inc VAT)
    Vent 3 is for warm and cold roof applications, it has no additional ventilation and has excellent nail tear strength. It is UV stable for 3 months and is clean and easy to use, weighing 135 gsm.
  • Damp Proof Membrane 250mu Blue PIFA Approved 4000 x 25,000mm

    Damp Proof Membrane 250mu Blue PIFA Approved 4000 x 25,000mm

    £39.22 - £45.64 (Ex VAT)
    £47.06 - £54.77 (Inc VAT)
    Standard Damp Proof Membrane BBA Approved. Plastic sheetused to prevent dampness from occurring through capillary action.
  • POLYTHENE DAMPPROOF COURSE 337.5mm 30m roll

    POLYTHENE DAMPPROOF COURSE 337.5mm 30m roll

    £3.47 - £31.20 (Ex VAT)
    £4.16 - £37.44 (Inc VAT)
    Capital Valley Plastics Polythene Damp Proof Course is 100mm wide and comes in a 30m roll. It is suitable for preventing walls made from brick, stone and concrete in either a domestic or an industrial environment, from rising damp. The Damp Proof Course...

Damp Proofing

Damp proof products such as damp proof membrane and damp proof course are an integral part of many construction and landscaping projects.

What is damp proofing?

Damp proofing is a method of controlling moisture and preventing it from moving between walls and floors.

A damp proof course is designed to be waterproof and usually positioned close to the ground, within the wall, to prevent rising damp. It is a must when building property foundations. The damp proof course will help prevent moisture from rising through the structure, protecting it from damp and helping to prolong its lifespan. A good damp course will prevent the need to repair any excessive damage that damp could cause.

At Howarth Timber & Building Supplies, we offer several types of Damp Proofing, including:

Plastic DPC
Plastic Damp Proof Course has high compressive strength and a long life expectancy. Its purpose is to act as a barrier to prevent damp spreading.

High-Performance DPC
High-Performance Damp Proof Course is thinner than traditional damp-proof courses, however, this doesn’t compromise on performance. This type of DPC can also offer fire resistance.

Insulated DPC
Insulated Damp Proof Course minimises cold bridges (sometimes referred to as thermal bridges) that can occur when there is a gap in insulation.

Ventilation
Ventilation is a crucial part of any home, as allowing air to move freely helps to prevent moisture build up and therefore damp. Ventilation helps homes with existing damp problems caused by large amounts of condensation, including shower areas. Air bricks are a good option for ventilating areas between cavity walls and suspended floors.

Expansion Joints
Expansion Joints are installed between brickwork and blocks and designed to handle movement such as from heat related expansion and contraction of building materials. The Expansion Joints purpose is to stop moisture from penetrating the building, preventing the creation and spread of damp.

Remedial Solutions
Remedial Solutions are products applied to surfaces including walls, floors, and ceilings to remedy existing damp problems such as those caused by condensation.

For expert advice and guidance on the best damp proofing for your property, please contact your friendly local Howarth branch.

Frequently Asked Questions

How much is damp proofing?
To know how much damp proofing is, you can speak to one of your local, friendly Howarth branches to discuss prices.
Do I need a damp proof course?
We would recommend a damp proof course.