Nhbc Roofing Mortar

Chapter 7 2 pitched roofs page 12 s12 b includes the following guidance.

Nhbc roofing mortar.

The mortar should be a mix based on sharp sand with soft sand added to achieve workability. National house building council is registered in england and wales under company number 320784. Mortar is vulnerable to deterioration by sulfates especially when masonry is saturated for long periods of time. The outcome of this research is that nhbc has up dated the mortar mix for roofing.

Nhbc is authorised by the prudential regulation authority and regulated by the financial conduct authority and the prudential regulation authority. All colors in stock lowest prices quick shipping. National house building council is registered in england and wales under company number 320784. Clay bricks contain soluble sulfate s1 designations have no limit on their sulfate content and so a suitable mortar should be used.

Following meetings with nfrc research was undertaken jointly to establish the suitability of some alternative proven mortar mixes for roofing applications. To reduce risk sulfate resisting portland cement to bs en 197 1 should be used. Nhbc s registered address is. A cavity tray should be provided to direct to the outside any water that enters the cavity.

Wet bedded verge tiles or slates should be fully bedded on roofing mortar having a minimum width of 100mm. Nhbc is authorised by the prudential regulation authority and regulated by the financial conduct authority and the prudential regulation authority. Nhbc house davy avenue knowlhill milton keynes bucks mk5 8fp. On page 5 specifically addresses mortar placement to verges which nhbc has seen to be susceptible to the effects of freeze thaw action.

In cavity walls over openings air bricks and the like. The proportion of sharp sand should not be less than one third of the total sand content proprietary mixes may be accepted by nhbc where they are shown to have similar strength durability and workability. The cavity tray should fully protect the opening. General wall area above dpc.

Mortar designation to bs en 1996 1 1. Nhbc s registered address is.