waterproofing brickwork and mortar

[mickfitz]

Hello

I'm building an outdoor brick oven. The roof will be a brick arch. Like the image below (if it works! )

It's obviously gonna get loads of rain on it. I need it to be as waterproof of possible, so I have 2 questions please:

1. Is there an additive I can add to the mortar?
2. What is the best waterproofing product I can brush/spray to the brick-work?

Thanks in advance

Mick

 

[PrenticeBoyofDerry]

You can if needed, add a waterproofing admixture to the mortar, this will give it extra water resistant qualities. There are a few about like SBR latex.
Thompson do a good water sealer
http://www.thompsonsweatherproofing.co.uk/products/product.jsp?id=1

 

[theoldun]

Respectfully, and not trying to put you of, it is a beautiful looking oven and a credit to the skill of who ever built it, but in my opinion it will not work.
The design is wrong. Even with 300 to 450mm light weight insulated concrete underneath the arched brickwork, the heat loss up the flue will not allow the oven to achieve the temperatures that you will be looking for.
Suggest you read some of the American web sites, How to build pizza ovens.
oldun

 

[mickfitz]

Thanks for the replies

I have heard Thompsons a few times so I'll go for that

Oldun ... it's already working mate and cooking lovely pizza. I did preen a lot of advise from the Americans especially http://www.fornobravo.com. They even have a set of free plans there