9 degree (almost) flat roof options

missanxious

We are building an extension but the roof cannot be more than 9 degrees. The best option for us is zinc but it is very expensive. A pitched roof is only possible in one direction which will result in a valley between the current back wall and the new extension. We want to avoid this.

Are there other options we could consider for a slanted roof of 9 degrees?
(should also mention it has 3 velux windows)

I have heard of tile like material that interlocks but don't know what it is called.

Any advice welcome.

muffler

This should be useful

topcatcbr

missanxious wrote: »

We are building an extension but the roof cannot be more than 9 degrees. The best option for us is zinc but it is very expensive. A pitched roof is only possible in one direction which will result in a valley between the current back wall and the new extension. We want to avoid this.

Are there other options we could consider for a slanted roof of 9 degrees?
(should also mention it has 3 velux windows)

I have heard of tile like material that interlocks but don't know what it is called.

Any advice welcome.

This is a flat roof in my opinion and you should use a material designed as such. Felt. Trocal type stuff maybe. Your designer should have thought of this during the design. Putting velux in a flat roof isn't a problem.

Nordman profile sheeting has a roof tile effect but I doubt it can go to 9*. Most profile sheeting can go to 15 afaik but I don't have a brochure in front of me.

muffler

topcatcbr wrote: »

Nordman profile sheeting has a roof tile effect but I doubt it can go to 9*. Most profile sheeting can go to 15 afaik but I don't have a brochure in front of me.

Nordman can go as low as a snakes belly........well about 4 degrees minimum.

picorette

missanxious wrote: »

We are building an extension but the roof cannot be more than 9 degrees. The best option for us is zinc but it is very expensive. A pitched roof is only possible in one direction which will result in a valley between the current back wall and the new extension. We want to avoid this.

Are there other options we could consider for a slanted roof of 9 degrees?
(should also mention it has 3 velux windows)

I have heard of tile like material that interlocks but don't know what it is called.

Any advice welcome.

Would you be able to post a sketch of what you are proposing ? It seems strange that your mono pitch roof has to fall back to the house. Is there no way it can fall another way ? Is an assymetrical pitched roof an option ?

Regarding Velux , they are not recommended to be installed under 15 degrees. They need the pitch to allow a run off of water. They can be installed in a flat roof, but only with an upstand to give them the required pitch.

topcatcbr

muffler wrote: »

Nordman can go as low as a snakes belly........well about 4 degrees minimum.

Well that may be a solution.
(Not sure I'd like it TBH).

The velux can be installed using a built up detail.

There are some times where a flat roof is the most suitable option. While I normally avoid them where I can It can be the best option. This might just be one. A roof pitch this low can be harder to get right.

MrsWhite2

Fibreglass flat roof might be an affordable option? Zinc would give nicer appearance however.