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EXTERNAL ENVELOPE
From Rust to Resilience R
estoration of 170-year-old ironwork on a heritage property was achieved with ease by a Devon decorating
company, thanks to its discovery of Ferrozinc from HMG Paints.
Dart Decorators were tasked with a complete makeover of the Grade II listed townhouse at Ashburton, a small town on the edge of Dartmoor, and turned to Rabart Decorators Merchants for advice on how to tackle the guttering and other ironwork. “They asked for advice on the external decoration as it was in such a poor state,” says Rabart’s area sales manager for Devon Peter Bird. “As well as advising on window, render repairs and external coatings we were able to introduce the contractor to the system of HMG specialist products best suited to tackling the ironwork.” “On the guttering there was 170 years- worth of paint to be stripped back plus some rusting” explains Dart Decorators’ Oliver Price. Rather than a costly stripping or blasting process the Rabart team recommended to treat the rust with HMG’s
blast clean metal
Ferrozinc followed by BDX Primer, then a fi nish with two coats of C71 Speedline. Ferrozinc rust converter is ideal for situations where it is not possible or practical to
substrates such as
restorations on historic properties. Ferrozinc’s primary advantage lies in its straightforward application. After removing loose debris and failed coatings, a simple scraping and wire brushing to eliminate loose rust prepares the surface. Applying a thin coat of Ferrozinc to the affected areas completes the process and a white-to- black colour change confi rms Ferrozinc’s rust neutralisation.
“This was an old building that needed really good quality paints,” says Oliver. “The HMG products were easy to use, and they took the restoration of the ironwork up to a different level.” The guttering was fi nished in a shade of pearl which was colour matched by Rabart to match the rest of the restored facades.
The HMG system is fast becoming a go-to for decorators and professionals tasked with
this type of work. After a thorough cleaning of loose material Ferrozinc can be applied to all signs of rust. The product goes on white and turns black to indicate that the rust patches have been neutralised.
Ferrozinc is then overcoated with BDX
Primer, a high-build, anti-corrosive coating and followed by C71 Speedline, a synthetic alkyd enamel which provides a tough fi nish, and is particularly suited to areas with a challenging exposure to the elements.
0161 205 7631
shop.hmgpaint.com
A. Proctor Group supports collaborative approach to new Passivhaus-standard campus
T
wo primary schools, an Early Learning and Childcare Centre, and other community facilities will all be housed
in the new £34m Faifl ey Community Campus in Clydebank. Due to be completed in 2026, the project is being delivered in compliance with the Net Zero Public Sector Buildings Standard (NZPSBS), as part of funding through the Learning Estate Investment Programme (LEIP2). As such, the new campus will be certifi ed to the Passivhaus standard, which requires thermally effi cient, airtight building fabric. The campus’ external wall build-up features A. Proctor Group’s Wraptite® airtightness membrane.
UV external
Architects Holmes Miller have embedded the Passivhaus standard into their work. Their track record in delivering Passivhaus-standard buildings includes East End Community Campus, which features A. Proctor Group’s standard Wraptite membrane. Like its counterpart membrane, Wraptite,
the specifi ed Wraptite UV membrane allows the campus buildings to benefi t from moving the airtight line to the exterior face of the external wall. Doing so avoids a lot of complex detailing (such as around services and other penetrations) that often occurs at the internal face. The composition of Wraptite UV makes it more resilient to the effects of UV exposure. It is typically used behind open-jointed cladding, though this wasn’t a consideration at Faifl ey Community Campus with its masonry and sinusoidal cladding facing materials. A benefi t of Wraptite UV’s resilience is that it can be left exposed for longer if required, which may have benefi ted the construction programme in this particular case. Wraptite UV is fully-adhered and doesn’t require a primer, saving on labour and material costs. It’s also vapour permeable, so can achieve a high level of airtightness without increasing condensation risk within the structure.
01250 872 261
proctorgroup.com/products/wraptite-uv
WWW.ARCHITECTSDATAFILE.CO.UK
ADF APRIL 2025
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