Question 1

How long does a slate roof last?

Accepted Answer

A correctly installed slate roof has a very long lifespan – often 100 years or more – and can survive several generations with minimal maintenance.

Question 2

Does Alta Quartzite require a lot of maintenance?

Accepted Answer

No. Alta Quartzite is one of the most maintenance-friendly materials and retains both function and appearance for decades.

Question 3

How do you clean Alta Quartzite?

Accepted Answer

Normally, water and a mild detergent will suffice. Avoid strong acids and high pressure directly on the joints.

Question 4

Does Alta Quartzite need impregnation?

Accepted Answer

Outdoors: normally no.Indoors: impregnation is often recommended to reduce stain absorption (especially in exposed zones).

Question 5

Can a pressure washer be used?

Accepted Answer

Yes, but with caution: low pressure, good distance – and never directly into joints. Improper use can damage joints and the substrate.

Question 6

What are red/brown spots on slate?

Accepted Answer

Red/brown spots are often caused by external influences (iron/rust/contamination from water, steel, substrate or grout). This is normally not a material defect and can often be dealt with with proper cleaning.

Frequently asked questions