Tekcem Durascreed from Tekfloor
ONE of the biggest frustrations for flooring and screeding contractors is the length of time a traditional sand and cement screed takes to cure.
The water content of a 75mm floating screed naturally has to be allowed to evaporate sufficiently before even light foot traffic is acceptable, meaning follow-on trades often have to wait weeks before floors are fully dry.
Nevertheless, UK specialist screeding distributor Tekfloor, which says it’s renowned for its commitment to new product development, has recently launched an addition to its additives section - and it’s said by the company to be set to revolutionise the floor screeding market.
Tekcem Durascreed is said by Tekfloor to be a technologically advanced screed hardening additive that when used in conjunction with proprietary screed mixtures, means thinner screed thicknesses can be achieved without compromising compressive strength.
Tekcem Durascreed reportedly allows screeding operatives to lay a traditional floating sand and cement screed from just 35mm thick, or an un-bonded sand and cement screed from 20mm thick.
In both instances, the finished surface becomes a highly stressed, wearing screed that meets BS 8204 standard and is claimed to be suitable for hard granular surfacing as well as underfloor heating.
Strengths of up to 60N/sq mm can also be achieved, meaning there’s reportedly no compromise on impact resistance or compressive performance when compared to its 75mm counterpart.
Tekfloor’s commercial director, Steve Foster said, ‘This is a very exciting development for the technical team at Tekfloor. The industry has been crying out for a solution like this for years and it now begs the question; Why would anyone choose to lay a floating screed at 75mm thick, if they could lay it at 35mm and still achieve a 7N/sq mm flexural strength and >2.0sq knm working load?’
It’s claimed the screed hardening additive couldn’t be simpler to use, since the company has arranged for it to be delivered in 1.3ltr containers, allowing for precision dosage to 2.5 bags of cement – no measuring of liquid is required.
Steve continued: ‘Although the construction industry is experiencing a national PIR shortage at the moment, on flooring projects where the specifier is in agreement, our customers are able to use our Durascreed screed hardening additive in conjunction with our Tektherm GPS150 insulation boards. Using a thicker insulation board with a thinner screed means operatives can often achieve a comparable system thickness to a PIR with 75mm screed.
‘Room heights aren’t overly compromised, U-values can be matched - if not improved on - and costs are highly competitive.
‘It’s a win-win for the industry. For the main contractor there are often cost savings to be had, since less sand and cement is required owing to the reduction in screed thickness, plus there are more opportunities to move the insulation away from conventional PIR, while the floor dries out twice as fast owing to the reduced thickness.
‘For the screeding contractor and follow on trades, they obviously benefit from a more widely available insulation material, plus faster laying times of a thinner screed layer.’