Our traditional lime mortar is made from our UK produced matured lime putty and specially selected sands. Our lime putty is made from a refined high calcium quicklime (CaO) that is slaked and left to mature for a minimum of three months.
Lime mortar was traditionally used for bedding, lime pointing and lime rendering and our high quality lime mortars are suitable for various building uses – please speak with our friendly technical sales staff for more information about how best to use lime mortar. Additional information on the different types of building lime is also available on our FAQs page or our Natural Hydraulic Lime website. For more information on the use of lime in floors, visit our dedicated Limecrete website.
Lime mortar is supplied as the following mixes:
Unhaired Coarse Mix.
3:1 ratio (sand : lime). Suitable for internal and external building, bedding Cob Blocks, rendering and plastering (scratch/float coat <10 mm), and pointing (add a pozzolan for external use)
3:1 ratio (sand : lime) with 2 kg of natural animal hair per m3 of mortar as standard but we can also make goat hair mixes to order if required. Suitable for backing coats of plaster. For the scratch coat onto lath ceilings we also supply an extra haired lime mortar (to be gauged with NHL5 or a pozzolan to create a firmer set).
Haired lime mortar needs to be used within 2 – 3 weeks as the hair will gradually dissolve with the alkaline lime. The mortar is still usable if you tease fresh hair back into it.
Extra Haired Coarse Mix.
3:1 ratio (sand : lime) with 3 kg of natural animal hair per m3 of mortar as standard . Suitable for scratch coat onto lath ceilings.
We also offer a range of coloured lime mortars for matching historic lime pointing.
This is achieved by mixing matured lime putty with blends of suitable coloured sands. We can supply sample biscuits for you to match your own mortar or we are happy to give advice if you send us a sample of your mortar in the post. The image below shows a selection of lime mortar biscuits that we can mix and supply for specific requirements for colour and texture. We can supply these by post for confirmation that the selected sample is suitable. These special mortar mixes may be charged at a higher rate than the standard unhaired mortar cost.
|2 x 50:50 / 1 x Chard
|2 x 50:50 / 1 x Chard
(Mixed with Secil NHL3.5 @ 3/1)
|2 x Blackhill /1 x 50:50||
|2 x 50:50 / 1 x Blackhill||
|2 x Blackhill / 1 x Ginger Wilkes||
|2 x Ginger Wilkes / 1 x Blackhill||
|2 x Millhill /1 x 50:50||
|1 x Millhill/1 x 50:50 / 1 x Ginger Wilkes||2 x Ginger Wilkes / 1 x 50:50||2 x 50:50 / 1 x Ginger Wilkes||Ginger Wilkes|
Our standard range of lime mortars are fully matured and available for immediate despatch. Specialist coloured mortars are typically used for pointing or bedding stone or brickwork where you need to match an existing or the local type of lime mortar. These mortars are made to order, typically with a 2-3 day lead time and some coloured lime mortars cost more than our standard lime mortar.
Please see below the standards that our raw materials conform to:
Sand: 0-4mm Sand EN12620 or BS882 Lime: BS EN 459-1 : 2001
Soundness test ( totally slaked ) – pass
PATS test ( moisture content/maturity ) – pass 99.99% is finer than 0.18mm particle size
Hair: All of the hair used in our hired lime mortar has been disinfected and has a veterinary (health) certificate.
You will find a wealth of information about how to use our products on our website, and we are very pleased to give advice on the telephone, but if you are looking for additional independent advice, we recommend The Society for the Protection of Ancient Buildings or The Listed Property Owners Club
1,000 kg of coarse mix lime mortar will:
- re-point approximately 100-150 m² of stonework.
- re-point approximately 50 m² of brickwork.
- render/plaster 50 m2 at 10 mm thick.
- lay approximately 150 cob blocks.
|Lime Mortar Unit Sizes||
20 kg tub, 500 kg bulk bag, 900 kg bulk bag, 1000 kg bulk bag