Cavity Trays offers preformed corbel cavitrays
Cavity Trayscontact supplier
preformed corbel cavitray
A preformed corbel cavitray that envelops the hidden faces of the corbel is manufactured to order by Cavity Trays.
Where corbel dimensions result in the cavity being encroached or breached, a different approach is required.
This must ensure the corbel cannot act as a bridge via which penetrating dampness can reach the inside skin.
The corbel cavitray prevents dampness from permeating inwardly and with thermal insulation bonded on those faces that run parallel with the outside skin, it also addresses cold bridging.
The envelopment can incorporate an upward angled section on the top of the corbel surround - to guard against water tracking - where masonry exists between it and its position in relation to the roofline.
The corbel cavitray is manufactured from petheleyne dpc and the phenolic insulation has a k value of 0.029W/mK.
Use of corbel cavitrays can improve the thermal behaviour at the point of incorporation and ensure the detail is unable to support water ingress.
Cavity Trays is pleased to schedule and quote for your requirements upon receipt of drawings.
Type BA Cavity Barrier Arch cavitrays from Cavity Trays have been designed for use in shaped rather than horizontal cavity walls to provide opening protection. Type BA cavitrays offer total protection to the angled head, extending upwardly and outwardly to prevent the build up of concentrated water wash.
New Pyramid Weep for cavity masonry download
The new Pyramid Weep for cavity masonry from Cavity Trays replaces traditional reed straw systems. Triangular in profile, the new weep provides an aesthetically neutral means of removing water that may permeate a structure. The possible flow width of the weep is maximised due to its flat base which also allows it to bed as flat and low as possible to service water evacuation from lintels, dpc’s and trays. The Pyramid Weep is manufactured using PVCu and, as a result, will not rot.
Cavity Trays is reporting that cavity walls that support an opening using separate lintels will improve the overall thermal performance of the structural opening as the lintels do not connect and therefore do not conduct heat loss. Using this method alongside a self-supporting Cavitray and an infilling profile Cavistock enhances performances levels even further. This arrangement can promote a lintel value of up to 0.05W/mk.
Cavity Trays movement challenges the lastest British Standard PD 6697: 2010 detail that results in the entire parapet masonry above the DPC being separated from the masonry below the DPC and is not the ideal structural arrangement for a highly exposed wall at the top of a building. They outline why the use of preformed self-supporting Type P parapet cavitray is the preferred option.
Cavity Trays, already the only UK manufacturer of preformed cavitrays to hold European Technical Approval, has now secured additional approvals from LABC Registered Details (Local Authority Building Control) for preformed curved and straight cavitrays plus its extensive range of Cavicloaks.