Question 1

How does the MOT Type 3 Permeable Sub-Base Calculator calculate UK quantities and costs?

Accepted Answer

Our MOT Type 3 Permeable Sub-Base Calculator uses standard UK trade formulas, British Standard compaction/wastage factors, and October 2026 UK retail/trade pricing for MOT Type 3 Open-Graded Sub-Base to estimate exact quantities and total project budgets in £ GBP.

Question 2

Where is the cheapest place to order or compare MOT Type 3 Open-Graded Sub-Base in the UK?

Accepted Answer

Most UK homeowners and trades compare trade delivery rates from Jewson / SuDS Permeable Paving alongside Screwfix and Toolstation accessory bundles.

Question 3

Should I add extra wastage when ordering materials in the UK?

Accepted Answer

Yes. UK building standards recommend adding 5%–10% wastage for straight paving, aggregates, and plasterboard, or 12%–15% for diagonal/herringbone cuts and patterned wallpaper.

MOT Type 3 Permeable Sub-Base Calculator

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