When you have a roof abutting a brick wall and there are not cavity trays against the abutment, how do you ensure that there are no gaps for the water to go in where the flashing is installed?. Is it always necessary to put a caulk, and if so, any particular type or technique to appply it?
Sealing effectiveness of flashing
- Thread starter frediaz
- Start date
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cavity trays are there to collect water that has permeated the outer course of brickwork through to the cavity and bears no relevance as to how you point the flashings. this water is then deflected back out by the cavity tray via weep vents which would sit in the perp joints immediately above the flashings.
some people use mortar and some use lead caulk (lead mate) to point their flashings in, i personally use mortar. it is better to wet the area first prior to mortar pointing, but it needs to be dry and dust free for the 'lead mate' method.
http://www.protecdirect.co.uk/Product.asp?i=2553
some people use mortar and some use lead caulk (lead mate) to point their flashings in, i personally use mortar. it is better to wet the area first prior to mortar pointing, but it needs to be dry and dust free for the 'lead mate' method.
http://www.protecdirect.co.uk/Product.asp?i=2553
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