Supporting loft boards

18 Dec 2011
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United Kingdom
Im going to do our loft insulation. At the moment we have 75mm of insulation between 80mm joists.

Im going to add another 200mm of insulation and want to board the 2 main sections of loft for some general storage.

Do i really need to add more joists running across the old ones to support the boards? Any other options?

Adding 200mm timber joists to support maybe 6 square meters of boards seems a little excessive to me.

Ive seen the legs you can get but im not convinced about them.

Any other ideas?
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Other than using pre-insulated or even PIR boards no.
I would go for the 200mm timber addition, run them perpendicular to the existing joists, life will be easier.
Also when boarding out, start from the loft hatch.

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