• Shutterstock 111923795
  • Shutterstock 230010793
  • BCS 4
  • Shutterstock 132054128
  • BCS 3

Trade Specifications

tagged "Mastic"

The following Trade Specifications must be read in conjunction with all other Contract documentation including; Tender Letter, General Terms, Conditions of Contract for Works, Labour Only and Purchase Orders, General Construction Notes (England & Wales), Suppliers and Sub Contract Works - Customer Charter and the Company's Occupational Safety, Health & Environmental Management System.

Our aim is to enable our sub-contractors and suppliers to access key Commercial information such as Terms & Conditions, Trade Specification, etc. online as soon as they are updated and revised. We hope that this will ensure that our supply chain is always fully informed as quickly as possible.

Whilst available online, this information is also available from the Commercial Departments at our Divisional offices and will form part of any contract we place (as set out in the Order).

Please be aware that bogus web sites seeking fees for the chance of working with major contractors exist.

Jon Hayward
Senior Group Commercial Manager


Revision Q - 01.08.2020

2. External Mastic

Clarification has been added to 2.1 (v) around perimeter of integral garage ceilings and perimeter of shared double garages with the use of intumescent sealant.

4. Internal Mastic

The following requirement has now been deleted in section 4.1 (i) The joint between the masonry wall and the timber joists and any other air path to the external face of the structure are to be carefully sealed with silicone sealant if the joists are not on hangers or shoes but built in to masonry wall.

Revision P - 01.01.2019

Two tables have been added to the trade specification, where mastic is required to be applied, both internally and externally, to assist contractors with the requirements already noted. No additional areas of mastic have been added to the requirements.

Revision O - 01.01.2018

3.1 addition - Do not silicone around any Amtico installation for a minimum of 72 hours after installation to allow for flooring adhesive to fully set.

Revision N - 01.07.2017

Formatting changes only.

Revision K - 01.07.2016

Within section 1, Quotation, a new subsection has been added limiting the inclusion for fire proofing, "1.4 Fire proofing within this trade specification is limited to dwellings and flat above garage units. Where Fire Proofing is required to Apartments the Contractor must refer specifically to the Fire Proofing Trade Specification."

Section 2, Mastic, has been split into 2. External Mastic and 3. Internal Mastic. Within section 3, subsection 3.1 two new points have been added for mastic to be completed "(v) Around cavity closer prior to fitting the window frame. The joint between the cavity closer and blockwork to be sealed prior to dry lining." and "Around mechanical extract fans where passing through the wall."

Within subsection 3.1, point (vii) has been amended to remove internal garage personnel doors with this being added into a new subsection 3.2 "Garages, where there is an apartment / flat above, to be sealed with intumescent acoustic sealant as follows: (i) All perimeter ceiling plasterboard joints sealed with intumescent acoustic sealant. (ii) Internal garage personnel door frames."

A new section 4 has been added to note Schedule of Material to be used when undertaking mastic works, "The Contractor is to use only the following materials in the locations noted above unless expressly noted otherwise by the Company in the tender enquiry."

Tags: Mastic